تعریف سازگاری اندروید 15

1. مقدمه

این سند شرایطی را که باید برای سازگاری دستگاه‌ها با Android 15 رعایت شود، برشمرده است.

استفاده از "MUST"، "MUST NOT"، "REQUIRED"، "SHALL"، "SHALL NOT"، "SHOULD"، "SHOULD NOT"، "Recommended"، "MAY" و "OPTIONAL" طبق IETF است. استاندارد تعریف شده در RFC2119 .

همانطور که در این سند استفاده می‌شود، «پیاده‌کننده دستگاه» یا «پیاده‌کننده» شخص یا سازمانی است که راه‌حل سخت‌افزار/نرم‌افزاری را با Android 15 توسعه می‌دهد. «پیاده‌سازی دستگاه» یا «پیاده‌سازی» راه‌حل سخت‌افزار/نرم‌افزاری است که به این شکل توسعه یافته است.

برای اینکه پیاده‌سازی‌های دستگاه با Android 15 سازگار در نظر گرفته شوند، باید الزامات ارائه‌شده در این تعریف سازگاری، از جمله هر سندی که از طریق مرجع گنجانده شده‌اند، داشته باشند.

در مواردی که این تعریف یا تست‌های نرم‌افزاری توضیح داده شده در بخش 10 بی‌صدا، مبهم یا ناقص باشد، این مسئولیت اجرای دستگاه است که از سازگاری با پیاده‌سازی‌های موجود اطمینان حاصل کند.

به همین دلیل، پروژه متن باز اندروید هم مرجع و هم پیاده سازی ترجیحی اندروید است. به اجراکنندگان دستگاه اکیداً توصیه می‌شود که پیاده‌سازی‌های خود را تا حد ممکن بر اساس کد منبع «بالادست» موجود در پروژه منبع باز Android قرار دهند. در حالی که برخی از مؤلفه‌ها می‌توانند به صورت فرضی با پیاده‌سازی‌های جایگزین جایگزین شوند، اکیداً توصیه می‌شود که از این رویه پیروی نکنید، زیرا گذراندن آزمون‌های نرم‌افزار به طور قابل‌توجهی دشوارتر می‌شود. این مسئولیت پیاده‌کننده است که از سازگاری کامل رفتاری با پیاده‌سازی استاندارد Android، از جمله و فراتر از مجموعه تست سازگاری اطمینان حاصل کند. در نهایت، توجه داشته باشید که تعویض و اصلاح برخی از اجزا به صراحت توسط این سند ممنوع است.

بسیاری از منابع مرتبط با این سند به طور مستقیم یا غیرمستقیم از Android SDK مشتق شده اند و از نظر عملکردی با اطلاعات موجود در اسناد آن SDK یکسان خواهند بود. در هر موردی که این تعریف سازگاری یا مجموعه تست سازگاری با مستندات SDK مخالف باشد، اسناد SDK معتبر تلقی می‌شوند. هر گونه جزئیات فنی ارائه شده در منابع مرتبط در سراسر این سند با گنجاندن بخشی از این تعریف سازگاری در نظر گرفته می شود.

1.1 ساختار سند

1.1.1. الزامات بر اساس نوع دستگاه

بخش 2 شامل تمام الزاماتی است که برای یک نوع دستگاه خاص اعمال می شود. هر بخش فرعی از بخش 2 به نوع خاصی از دستگاه اختصاص دارد.

تمام الزامات دیگر، که به طور جهانی برای هر پیاده سازی دستگاه Android اعمال می شود، در بخش های بعد از بخش 2 فهرست شده است. این الزامات به عنوان "نیازهای اصلی" در این سند ذکر شده است.

1.1.2. شناسه مورد نیاز

شناسه مورد نیاز برای الزامات MUST اختصاص داده شده است.

  • شناسه فقط برای الزامات MUST اختصاص داده شده است.
  • الزامات STRONGLY RECOMMENDED به عنوان [SR] علامت گذاری شده اند اما شناسه اختصاص داده نشده است.
  • شناسه شامل موارد زیر است: شناسه نوع دستگاه - شناسه وضعیت - شناسه مورد نیاز (به عنوان مثال C-0-1).

هر شناسه به صورت زیر تعریف می شود:

  • شناسه نوع دستگاه (بیشتر را در 2. انواع دستگاه ببینید)
    • C: Core (الزاماتی که برای همه پیاده سازی های دستگاه اندروید اعمال می شود)
    • H: دستگاه Android Handheld
    • T: دستگاه Android TV
    • A: پیاده سازی Android Automotive
    • W: پیاده سازی Android Watch
    • تب: پیاده سازی تبلت اندروید
  • شناسه وضعیت
    • هنگامی که شرط بدون قید و شرط باشد، این شناسه به عنوان 0 تنظیم می شود.
    • وقتی شرط شرطی است، 1 برای شرط اول اختصاص داده می شود و عدد در همان بخش و همان نوع دستگاه، 1 افزایش می یابد.
  • شناسه مورد نیاز
    • این شناسه از 1 شروع می شود و در همان بخش و شرایط یکسان 1 افزایش می یابد.

1.1.3. شناسه مورد نیاز در بخش 2

شناسه های مورد نیاز در بخش 2 دارای دو بخش هستند. اولین مورد مربوط به شناسه بخش همانطور که در بالا توضیح داده شد. بخش دوم فاکتور فرم و نیاز خاص فرم فاکتور را مشخص می کند.

شناسه بخش که با شناسه مورد نیاز شرح داده شده در بالا دنبال می شود.

  • شناسه در بخش 2 شامل: شناسه بخش / شناسه نوع دستگاه - شناسه شرایط - شناسه مورد نیاز (به عنوان مثال 7.4.3/A-0-1).

2. انواع دستگاه

پروژه منبع باز Android یک پشته نرم افزاری را ارائه می دهد که می تواند برای انواع مختلف دستگاه ها و عوامل شکل استفاده شود. برای پشتیبانی از امنیت در دستگاه‌ها، انتظار می‌رود پشته نرم‌افزار، از جمله هر سیستم‌عامل جایگزین یا اجرای هسته جایگزین، در یک محیط امن همانطور که در بخش 9 و جاهای دیگر این CDD توضیح داده شده است اجرا شود. چند نوع دستگاه وجود دارد که اکوسیستم توزیع کاربرد نسبتاً بهتری دارند.

این بخش انواع دستگاه ها و الزامات و توصیه های اضافی قابل اجرا برای هر نوع دستگاه را شرح می دهد.

همه پیاده‌سازی‌های دستگاه Android که در هیچ یک از انواع دستگاه‌های توصیف‌شده قرار نمی‌گیرند، باید همچنان همه الزامات موجود در بخش‌های دیگر این تعریف سازگاری را برآورده کنند.

2.1 تنظیمات دستگاه

برای تفاوت‌های عمده در پیکربندی سخت‌افزار بر اساس نوع دستگاه، الزامات خاص دستگاه را که در این بخش دنبال می‌شود، ببینید.

2.2. الزامات دستی

دستگاه Android Handheld به یک پیاده سازی دستگاه اندرویدی اشاره دارد که معمولاً با نگه داشتن آن در دست استفاده می شود، مانند پخش کننده mp3، تلفن یا تبلت.

پیاده‌سازی‌های دستگاه اندروید در صورتی که تمام معیارهای زیر را داشته باشند به عنوان دستی طبقه‌بندی می‌شوند:

  • منبع تغذیه ای داشته باشید که تحرک را فراهم می کند، مانند باتری.
  • اندازه صفحه نمایش مورب فیزیکی در محدوده 4 اینچ تا 8 اینچ داشته باشید.
  • یک رابط ورودی صفحه لمسی داشته باشید.

الزامات اضافی در بقیه این بخش مختص پیاده سازی دستگاه Android Handheld است.

توجه: الزاماتی که برای دستگاه‌های تبلت Android اعمال نمی‌شوند با علامت * مشخص می‌شوند.

2.2.1. سخت افزار

پیاده سازی دستگاه های دستی:

  • [ 7.1 .1.1/H-0-1] باید حداقل یک صفحه نمایش سازگار با Android داشته باشد که حداقل اندازه آن 2.2 اینچ در لبه کوتاه و 3.4 اینچ در لبه بلند باشد.
  • [ 7.1 .1.3/H-SR-1] اکیداً توصیه می شود تا امکان تغییر اندازه نمایشگر (تراکم صفحه) را به کاربران ارائه دهند.

  • [ 7.1 .1.1/H-0-2] باید ترکیب GPU بافرهای گرافیکی را حداقل به اندازه بالاترین وضوح صفحه نمایش داخلی پشتیبانی کند.

  • [ 7.1 .1.1/H-0-3]* باید هر صفحه نمایش UI_MODE_NORMAL که برای برنامه های شخص ثالث در دسترس است، در یک ناحیه نمایش فیزیکی بدون مانع که حداقل 2.2 اینچ در لبه کوتاه و 3.4 اینچ در لبه بلند است، نقشه برداری کند.

  • [ 7.1 .1.3/H-0-1]* باید مقدار DENSITY_DEVICE_STABLE را 92% یا بیشتر از چگالی فیزیکی واقعی نمایشگر مربوطه تنظیم کند.

اگر پیاده سازی دستگاه های دستی شامل پشتیبانی از Vulkan باشد، آنها:

اگر پیاده‌سازی‌های دستگاه دستی از طریق Configuration.isScreenHdr() از نمایشگرهای محدوده دینامیکی بالا پشتیبانی می‌کنند، آنها:

  • [ 7.1 .4.5 VK_EXT_swapchain_colorspace H-1-1] باید برای EGL_EXT_gl_colorspace_bt2020_pq ، EGL_EXT_surface_SMPTE2086_metadata ، EGL_EXT_surface_CTA861_3_metadata پسوندهای VK_EXT_hdr_metadata .

پیاده سازی دستگاه های دستی:

  • [ 7.1 .4.6/H-0-1] باید گزارش دهد که آیا دستگاه از قابلیت نمایه سازی GPU از طریق ویژگی سیستم graphics.gpu.profiler.support پشتیبانی می کند یا خیر.

اگر پیاده‌سازی‌های دستگاه دستی از طریق ویژگی سیستم graphics.gpu.profiler.support پشتیبانی را اعلام کنند، آنها:

  • [ 7.1 .4.6/H-1-1] باید یک ردیابی پروتوباف را به عنوان خروجی گزارش کند که با طرح شمارشگرهای GPU و مراحل پردازش گرافیکی تعریف شده در مستندات Perfetto مطابقت دارد.
  • [ 7.1 .4.6/H-1-2] باید مقادیر منطبق را برای شمارنده‌های GPU دستگاه به دنبال پروتو بسته ردیابی شمارنده gpu گزارش کند.
  • [ 7.1 .4.6/H-1-3] باید مقادیر منطبق برای GPU RenderStages دستگاه را به دنبال پروتوی بسته ردیابی مرحله رندر گزارش کند.
  • [ 7.1 .4.6/H-1-4] باید یک نقطه ردیابی فرکانس GPU را همانطور که با فرمت مشخص شده گزارش کند: power/gpu_frequency .

پیاده سازی دستگاه های دستی:

  • [ 7.1 .5/H-0-1] باید شامل پشتیبانی از حالت سازگاری برنامه های قدیمی همانطور که توسط کد منبع باز بالادستی Android پیاده سازی شده باشد. به این معنا که پیاده‌سازی دستگاه نباید محرک‌ها یا آستانه‌هایی را که در آن حالت سازگاری فعال می‌شود، تغییر دهند، و نباید رفتار خود حالت سازگاری را تغییر دهند.
  • [ 7.2 .1/H-0-1] باید شامل پشتیبانی از برنامه های کاربردی ویرایشگر روش ورودی (IME) شخص ثالث باشد.
  • [ 7.2 .3/H-0-2] باید هر دو رویداد فشار عادی و طولانی عملکرد Back ( KEYCODE_BACK ) را به برنامه پیش زمینه ارسال کند. این رویدادها نباید توسط سیستم مصرف شوند و می توانند توسط خارج از دستگاه Android (به عنوان مثال صفحه کلید سخت افزاری خارجی متصل به دستگاه Android) فعال شوند.
  • [ 7.2 .3/H-0-3] باید عملکرد Home را در همه نمایشگرهای سازگار با Android که صفحه اصلی را ارائه می دهند، ارائه دهد.
  • [ 7.2 .3/H-0-4] باید عملکرد Back را در همه نمایشگرهای سازگار با Android و عملکرد Recents را در حداقل یکی از نمایشگرهای سازگار با Android ارائه دهد.
  • [ 7.2.4 /H-0-1] باید از ورودی صفحه لمسی پشتیبانی کند.
  • [ 7.2 .4/H-SR-1] برای راه‌اندازی برنامه کمکی انتخاب‌شده توسط کاربر، به عبارت دیگر برنامه‌ای که VoiceInteractionService یا فعالیتی که ACTION_ASSIST را با فشار طولانی KEYCODE_MEDIA_PLAY_PAUSE یا KEYCODE_HEADSETHOOK برای فعالیت‌های زمینه، اجرا می‌کند، به شدت توصیه می‌شود. آن رویدادهای مطبوعاتی طولانی را مدیریت نمی کند.
  • [ 7.3 .1/H-SR-1] اکیداً توصیه می‌شود که شتاب‌سنج 3 محوره را در خود جای دهید.

اگر پیاده سازی های دستگاه دستی شامل شتاب سنج 3 محوره باشد، آنها:

  • [ 7.3 .1/H-1-1] باید بتواند رویدادها را تا فرکانس حداقل 100 هرتز گزارش کند.

اگر پیاده‌سازی‌های دستگاه دستی شامل گیرنده GPS/GNSS باشد و قابلیت آن را از طریق پرچم ویژگی android.hardware.location.gps به برنامه‌ها گزارش کند، آنها:

  • [ 7.3 .3/H-2-1] باید اندازه گیری های GNSS را به محض یافتن گزارش کند، حتی اگر مکان محاسبه شده از GPS/GNSS هنوز گزارش نشده باشد.
  • [ 7.3 0.3/H-2-2] باید مقادیر شبه و نرخ شبه GNSS را گزارش کند، که در شرایط آسمان باز پس از تعیین مکان، در حالی که ساکن یا حرکت با شتاب کمتر از 0.2 متر بر ثانیه مجذور شتاب، برای محاسبه کافی است. موقعیت در 20 متر، و سرعت در 0.2 متر در ثانیه، حداقل 95٪ از زمان.

اگر پیاده سازی های دستگاه دستی شامل یک ژیروسکوپ 3 محوره باشد، آنها:

  • [ 7.3 .4/H-3-1] باید بتواند رویدادها را تا فرکانس حداقل 100 هرتز گزارش کند.
  • [ 7.3 .4/H-3-2] باید قادر به اندازه گیری تغییرات جهت تا 1000 درجه در ثانیه باشد.

پیاده سازی های دستگاه دستی که می توانند تماس صوتی برقرار کنند و هر مقداری غیر از PHONE_TYPE_NONE را در getPhoneType نشان دهند:

  • [ 7.3 .8/H] باید دارای حسگر مجاورت باشد.

پیاده سازی دستگاه های دستی:

  • [ 7.3 .11/H-SR-1] برای پشتیبانی از حسگر پوز با 6 درجه آزادی به شدت توصیه می شود.

شروع الزامات جدید برای اندروید 15

  • [ 7.4 .3/H] باید شامل پشتیبانی از بلوتوث و بلوتوث LE باشد.

پیاده سازی دستگاه های دستی که شامل پشتیبانی از بلوتوث LE است:

  • [ 7.4 .3/H-SR-1] برای پشتیبانی از افزونه طول بسته داده بلوتوث LE به شدت توصیه می شود.

پایان الزامات جدید

اگر دستگاه‌ها با اعلام PackageManager.FEATURE_WIFI_AWARE و مکان Wi-Fi (زمان رفت و برگشت Wi-Fi — RTT) از پروتکل Wi-Fi Neighbor Awareness Networking (NAN) با اعلام PackageManager.FEATURE_WIFI_RTT پشتیبانی می‌کنند، آن‌گاه:

  • [ 7.4 0.2.5/H-1-1] باید محدوده را به دقت در محدوده +/-1 متر در پهنای باند 160 مگاهرتز در صدک 68 (همانطور که با تابع توزیع تجمعی محاسبه می شود)، +/-2 متر در پهنای باند 80 مگاهرتز گزارش کند. در صدک 68، +/-4 متر در پهنای باند 40 مگاهرتز در صدک 68، و +/-8 متر در پهنای باند 20 مگاهرتز در صدک 68 در فواصل 10 سانتی متر، 1 متر، 3 متر و 5 متر، به عنوان از طریق WifiRttManager#startRanging Android API مشاهده شده است.

  • [ 7.4 .2.5/H-SR-1] اکیداً توصیه می شود که محدوده را به طور دقیق در محدوده +/-1 متر در پهنای باند 160 مگاهرتز در صدک 90 (همانطور که با تابع توزیع تجمعی محاسبه می شود)، +/-2 متر در پهنای باند 80 مگاهرتز در صدک 90، +/-4 متر در پهنای باند 40 مگاهرتز در صدک 90، و +/-8 متر در پهنای باند 20 مگاهرتز در صدک 90 در فواصل 10 سانتی‌متر، همانطور که از طریق WifiRttManager#st مشاهده شده است. API .

اکیداً توصیه می شود مراحل تنظیم اندازه گیری مشخص شده در کالیبراسیون حضور را دنبال کنید.

اگر پیاده‌سازی‌های دستگاه دستی FEATURE_BLUETOOTH_LE را اعلام کنند، آنها:

  • [ 7.4 .3/H-1-3] باید اندازه گیری و جبران Rx Offset شود تا اطمینان حاصل شود که میانه BLE RSSI در فاصله 1 متری از دستگاه مرجعی که در ADVERTISE_TX_POWER_HIGH ارسال می کند -50dBm +/-15 دسی بل است.
  • [ 7.4 .3/H-1-4] باید برای Tx offset اندازه گیری و جبران شود تا اطمینان حاصل شود که میانه BLE RSSI -50dBm +/-15 dB در هنگام اسکن از دستگاه مرجع واقع در فاصله 1 متری و ارسال در ADVERTISE_TX_POWER_HIGH است.

اگر پیاده‌سازی‌های دستگاه دستی شامل یک دستگاه دوربین منطقی باشد که قابلیت‌ها را با استفاده از CameraMetadata.REQUEST_AVAILABLE_CAPABILITIES_LOGICAL_MULTI_CAMERA فهرست می‌کند.REQUEST_AVAILABLE_CAPABILITIES_LOGICAL_MULTI_CAMERA، آنها:

  • [ 7.5 .4/H-1-1] باید به طور پیش فرض میدان دید طبیعی (FOV) داشته باشد و باید بین 50 و درجه باشد.

پیاده سازی دستگاه های دستی:

  • [ 7.6 .1/H-0-1] باید حداقل 4 گیگابایت فضای ذخیره سازی غیرفرار برای داده های خصوصی برنامه (معروف به پارتیشن "/data") در دسترس باشد.
  • [ 7.6 .1/H-0-2] وقتی کمتر از 1 گیگابایت حافظه در اختیار هسته و فضای کاربر وجود دارد، باید برای ActivityManager.isLowRamDevice() "true" را برگرداند.

اگر پیاده‌سازی‌های دستگاه دستی فقط از ABI 32 بیتی پشتیبانی می‌کنند:

  • [ 7.6 .1/H-1-1] حافظه موجود برای هسته و فضای کاربر باید حداقل 416 مگابایت باشد اگر نمایشگر پیش فرض از وضوح فریم بافر تا qHD (مثلاً FWVGA) استفاده می کند.

  • [ 7.6 .1/H-2-1] حافظه موجود برای هسته و فضای کاربر باید حداقل 592 مگابایت باشد اگر نمایشگر پیش‌فرض از وضوح فریم بافر تا HD+ استفاده می‌کند (مثلاً HD، WSVGA).

  • [ 7.6 .1/H-3-1] حافظه موجود برای هسته و فضای کاربر باید حداقل 896 مگابایت باشد اگر صفحه نمایش پیش فرض از وضوح فریم بافر تا FHD استفاده می کند (به عنوان مثال WSXGA+).

  • [ 7.6 .1/H-4-1] اگر صفحه نمایش پیش فرض از وضوح فریم بافر تا QHD (به عنوان مثال QWXGA) استفاده می کند، حافظه موجود برای هسته و فضای کاربر باید حداقل 1344 مگابایت باشد.

اگر پیاده‌سازی‌های دستگاه دستی از هر ABI 64 بیتی (با یا بدون هیچ ABI 32 بیتی) پشتیبانی می‌کنند:

  • [ 7.6 .1/H-5-1] حافظه موجود برای هسته و فضای کاربر باید حداقل 816 مگابایت باشد اگر نمایشگر پیش‌فرض از وضوح فریم بافر تا qHD (به عنوان مثال FWVGA) استفاده می‌کند.

  • [ 7.6 .1/H-6-1] حافظه موجود برای هسته و فضای کاربر باید حداقل 944 مگابایت باشد اگر نمایشگر پیش‌فرض از وضوح فریم بافر تا HD+ استفاده می‌کند (مثلاً HD، WSVGA).

  • [ 7.6 .1/H-7-1] حافظه موجود برای هسته و فضای کاربر باید حداقل 1280 مگابایت باشد اگر صفحه نمایش پیش فرض از وضوح فریم بافر تا FHD استفاده می کند (به عنوان مثال WSXGA+).

  • [ 7.6 .1/H-8-1] حافظه موجود برای هسته و فضای کاربر باید حداقل 1824 مگابایت باشد اگر صفحه نمایش پیش فرض از وضوح فریم بافر تا QHD (مثلا QWXGA) استفاده می کند.

توجه داشته باشید که "حافظه در دسترس برای هسته و فضای کاربر" در بالا به فضای حافظه ارائه شده به اضافه هر حافظه ای که قبلاً به اجزای سخت افزاری مانند رادیو، ویدئو و غیره اختصاص داده شده است که در پیاده سازی های دستگاه تحت کنترل هسته نیستند، اشاره دارد.

اگر پیاده‌سازی‌های دستگاه دستی شامل کمتر یا مساوی 1 گیگابایت حافظه در دسترس هسته و فضای کاربر باشد، آنها:

  • [ 7.6 .1/H-9-1] باید پرچم ویژگی android.hardware.ram.low را اعلام کند.
  • [ 7.6 .1/H-9-2] باید حداقل 1.1 گیگابایت فضای ذخیره سازی غیر فرار برای داده های خصوصی برنامه (معروف به پارتیشن "/data") داشته باشد.

اگر پیاده سازی های دستگاه دستی شامل بیش از 1 گیگابایت حافظه در دسترس هسته و فضای کاربر باشد، آنها:

  • [ 7.6 .1/H-10-1] باید حداقل 4 گیگابایت فضای ذخیره سازی غیر فرار برای داده های خصوصی برنامه (معروف به پارتیشن "/data") در دسترس باشد.
  • باید پرچم ویژگی android.hardware.ram.normal را اعلام کند.

اگر پیاده‌سازی‌های دستگاه دستی شامل حافظه بیشتر یا مساوی 2 گیگابایت و کمتر از 4 گیگابایت در اختیار هسته و فضای کاربر باشد، آنها:

  • [7.6.1/H-SR-1] اکیداً برای پشتیبانی از فضای کاربری 32 بیتی (هم برنامه ها و هم کد سیستم) توصیه می شود.

اگر پیاده سازی های دستگاه دستی شامل کمتر از 2 گیگابایت حافظه در دسترس هسته و فضای کاربر باشد، آنها:

  • [7.6.1/H-1-1] باید فقط از یک ABI (فقط 64 بیتی یا فقط 32 بیتی) پشتیبانی کند.

پیاده سازی دستگاه های دستی:

  • [ 7.6 .2/H-0-1] نباید یک برنامه ذخیره سازی مشترک کوچکتر از 1 گیگابایت ارائه کند.
  • [ 7.7.1 /H] باید دارای یک درگاه USB باشد که از حالت جانبی پشتیبانی می کند.

شروع الزامات جدید برای اندروید 15

اگر پیاده‌سازی‌های دستگاه دستی شامل یک پورت USB باشد که از کنترل‌کننده‌ای که در حالت جانبی کار می‌کند پشتیبانی می‌کند ، آنها:

  • [ 7.7 .1/H-1-1] باید API Android Open Accessory (AOA) را پیاده سازی کند.

پایان الزامات جدید

اگر پیاده‌سازی‌های دستگاه دستی شامل یک پورت USB باشد که از حالت میزبان پشتیبانی می‌کند، آنها:

  • [ 7.7 .2/H-1-1] باید کلاس صوتی USB را همانطور که در مستندات Android SDK مستند شده است پیاده سازی کند.

پیاده سازی دستگاه های دستی:

  • [ 7.8 .1/H-0-1] باید دارای میکروفون باشد.
  • [ 7.8 .2/H-0-1] باید یک خروجی صدا داشته باشد و android.hardware.audio.output اعلام کند.

اگر پیاده‌سازی‌های دستگاه دستی قادر به برآورده کردن تمام الزامات عملکرد برای پشتیبانی از حالت VR و شامل پشتیبانی از آن باشند، آنها:

  • [ 7.9 .1/H-1-1] باید پرچم ویژگی android.hardware.vr.high_performance را اعلام کند.
  • [ 7.9 .1/H-1-2] باید شامل برنامه ای باشد که android.service.vr.VrListenerService را اجرا می کند که می تواند توسط برنامه های VR از طریق android.app.Activity#setVrModeEnabled فعال شود.

اگر پیاده‌سازی‌های دستگاه دستی شامل یک یا چند پورت USB-C در حالت میزبان و پیاده‌سازی (کلاس صوتی USB)، علاوه بر الزامات بخش 7.7.2 ، آنها:

  • [ 7.8 .2.2/H-1-1] باید نقشه نرم افزاری زیر را از کدهای HID ارائه کند:
تابع نقشه برداری ها زمینه رفتار
الف صفحه استفاده HID : 0x0C
استفاده از HID : 0x0CD
کلید هسته : KEY_PLAYPAUSE
کلید Android : KEYCODE_MEDIA_PLAY_PAUSE
پخش رسانه ورودی : فشار کوتاه
خروجی : پخش یا مکث
ورودی : فشار طولانی
خروجی : دستور صوتی را اجرا کنید
در صورتی که دستگاه قفل باشد یا صفحه نمایش آن خاموش باشد: android.speech.action.VOICE_SEARCH_HANDS_FREE را ارسال می کند . android.speech.RecognizerIntent.ACTION_WEB_SEARCH را در غیر این صورت ارسال می کند
تماس ورودی ورودی : فشار کوتاه
خروجی : پذیرش تماس
ورودی : فشار طولانی
خروجی : رد تماس
تماس در حال انجام ورودی : فشار کوتاه
خروجی : پایان تماس
ورودی : فشار طولانی
خروجی : بی‌صدا یا بی‌صدا کردن میکروفون
ب صفحه استفاده HID : 0x0C
استفاده از HID : 0x0E9
کلید هسته : KEY_VOLUMEUP
کلید Android : VOLUME_UP
پخش رسانه، تماس در حال انجام ورودی : فشار کوتاه یا طولانی
خروجی : صدای سیستم یا هدست را افزایش می دهد
سی صفحه استفاده HID : 0x0C
استفاده از HID : 0x0EA
کلید هسته : KEY_VOLUMEDOWN
کلید Android : VOLUME_DOWN
پخش رسانه، تماس در حال انجام ورودی : فشار کوتاه یا طولانی
خروجی : صدای سیستم یا هدست را کاهش می دهد
D صفحه استفاده HID : 0x0C
استفاده از HID : 0x0CF
کلید هسته : KEY_VOICECOMMAND
کلید Android : KEYCODE_VOICE_ASSIST
همه در هر نمونه ای می توان راه اندازی کرد. ورودی : فشار کوتاه یا طولانی
خروجی : دستور صوتی را اجرا کنید
  • [ 7.8 .2.2/H-1-2] باید ACTION_HEADSET_PLUG را روی یک درج پلاگین راه اندازی کند، اما فقط پس از اینکه رابط های صوتی USB و نقاط پایانی به درستی شمارش شدند تا نوع ترمینال متصل شده را شناسایی کنید.

هنگامی که ترمینال صوتی USB نوع 0x0302 شناسایی شد، آنها:

  • [ 7.8 .2.2/H-2-1] باید Intent ACTION_HEADSET_PLUG را با «میکروفون» اضافی روی 0 پخش کند.

هنگامی که ترمینال صوتی USB نوع 0x0402 شناسایی شد، آنها:

  • [ 7.8 .2.2/H-3-1] باید Intent ACTION_HEADSET_PLUG را با «میکروفون» اضافی روی 1 پخش کند.

هنگامی که API AudioManager.getDevices () فراخوانی می شود در حالی که دستگاه جانبی USB متصل است، آنها:

  • [ 7.8 .2.2/H-4-1] اگر فیلد نوع پایانه صوتی USB 0x0302 باشد، باید دستگاهی از نوع AudioDeviceInfo.TYPE_USB_HEADSET و نقش isSink() را فهرست کند.

  • [ 7.8 .2.2/H-4-2] اگر فیلد نوع پایانه صوتی USB 0x0402 باشد، باید دستگاهی از نوع AudioDeviceInfo.TYPE_USB_HEADSET و نقش isSink() را فهرست کند.

  • [ 7.8 .2.2/H-4-3] اگر فیلد نوع پایانه صوتی USB 0x0402 باشد، باید دستگاهی از نوع AudioDeviceInfo.TYPE_USB_HEADSET و نقش isSource() فهرست کند.

  • [ 7.8 .2.2/H-4-4] اگر فیلد نوع پایانه صوتی USB 0x603 باشد، باید دستگاهی از نوع AudioDeviceInfo.TYPE_USB_DEVICE و نقش isSink() فهرست کند.

  • [ 7.8 .2.2/H-4-5] اگر فیلد نوع پایانه صوتی USB 0x604 باشد، باید دستگاهی از نوع AudioDeviceInfo.TYPE_USB_DEVICE و نقش isSource() را فهرست کند.

  • [ 7.8 .2.2/H-4-6] اگر فیلد نوع پایانه صوتی USB 0x400 باشد، باید دستگاهی از نوع AudioDeviceInfo.TYPE_USB_DEVICE و نقش isSink() را فهرست کند.

  • [ 7.8 .2.2/H-4-7] اگر فیلد نوع پایانه صوتی USB 0x400 باشد، باید دستگاهی از نوع AudioDeviceInfo.TYPE_USB_DEVICE و نقش isSource() را فهرست کند.

  • [ 7.8 .2.2/H-SR-1] برای انجام شمارش توصیفگرهای USB، شناسایی انواع ترمینال و پخش Intent ACTION_HEADSET_PLUG در کمتر از 1000 میلی ثانیه، پس از اتصال یک دستگاه صوتی USB-C به شدت توصیه می شود.

شروع الزامات جدید برای اندروید 15

اگر برای پیاده سازی های دستگاه دستی که android.hardware.audio.output و android.hardware.microphone را اعلام می کنند، آنها: الزامات RTL و TTL را در بخش 5.6 ببینید .

  • [ 5.6 /H-1-1] باید میانگین تأخیر رفت و برگشت پیوسته 300 میلی ثانیه یا کمتر در 5 اندازه گیری، با میانگین انحراف مطلق کمتر از 30 میلی ثانیه، در مسیرهای داده زیر داشته باشد: "بلندگو به میکروفون"، 3.5 میلی متر آداپتور Loopback (در صورت پشتیبانی)، USB Loopback (در صورت پشتیبانی).

  • [ 5.6 /H-1-2] باید میانگین تأخیر ضربه به تن 300 میلی ثانیه یا کمتر در حداقل 5 اندازه گیری در مسیر داده بلندگو به میکروفون داشته باشد.

پایان الزامات جدید

محرک رزونانس خطی (LRA) یک سیستم فنر تک جرمی است که دارای فرکانس تشدید غالب است که در آن جرم در جهت حرکت مورد نظر ترجمه می شود.

اگر پیاده‌سازی‌های دستگاه دستی شامل حداقل یک محرک رزونانس خطی 7.10 باشد، آنها:

  • [ 7.10 /H] باید محل قرارگیری محرک را در نزدیکی محلی قرار دهید که معمولاً دستگاه را با دست نگه داشته یا لمس می‌کنید.

  • [ 7.10 /H] باید محرک لمسی را در محور X (چپ-راست) جهت طبیعی دستگاه حرکت دهد.

اگر پیاده‌سازی‌های دستگاه دستی دارای یک محرک لمسی با هدف عمومی باشند که محرک تشدید خطی محور X (LRA) است، آنها:

  • [ 7.10 /H] باید فرکانس تشدید LRA محور X کمتر از 200 هرتز باشد.

اگر پیاده سازی دستگاه های دستی از نگاشت ثابت های لمسی پیروی کنند، آنها:

2.2.2. چند رسانه ای

پیاده سازی دستگاه های دستی باید فرمت های رمزگذاری و رمزگشایی صوتی زیر را پشتیبانی کرده و آنها را برای برنامه های شخص ثالث در دسترس قرار دهند:

  • [ 5.1 /H-0-1] AMR-NB
  • [ 5.1 /H-0-2] AMR-WB
  • [ 5.1 /H-0-3] نمایه AAC MPEG-4 (AAC LC)
  • [ 5.1 /H-0-4] نمایه MPEG-4 HE AAC (AAC+)
  • [ 5.1 /H-0-5] AAC ELD (AAC تاخیر کم تقویت شده)

پیاده سازی دستگاه های دستی باید از فرمت های رمزگذاری ویدیوی زیر پشتیبانی کرده و آنها را برای برنامه های شخص ثالث در دسترس قرار دهند:

  • [ 5.2 /H-0-1] H.264 AVC
  • [ 5.2 /H-0-2] VP8
  • [ 5.2 /H-0-3] AV1

پیاده سازی دستگاه های دستی باید از فرمت های رمزگشایی ویدیوی زیر پشتیبانی کرده و آنها را برای برنامه های شخص ثالث در دسترس قرار دهند:

  • [ 5.3 /H-0-1] H.264 AVC
  • [ 5.3 /H-0-2] H.265 HEVC
  • [ 5.3 /H-0-3] MPEG-4 SP
  • [ 5.3 /H-0-4] VP8
  • [ 5.3 /H-0-5] VP9
  • [ 5.3 /H-0-6] AV1

2.2.3. نرم افزار

پیاده سازی دستگاه های دستی:

  • [ 3.2.3.1 /H-0-1] باید برنامه‌ای داشته باشد که اهداف ACTION_GET_CONTENT ، ACTION_OPEN_DOCUMENT ، ACTION_OPEN_DOCUMENT_TREE ، و ACTION_CREATE_DOCUMENT را همانطور که در اسناد SDK توضیح داده شده است، مدیریت کند و با استفاده از امکان دسترسی به DocumentsProvider API اطلاعات کاربر را فراهم کند.
  • [ 3.2.3.1 /H-0-2]* باید یک یا چند برنامه یا مؤلفه خدمات را با یک کنترل کننده هدف، برای همه الگوهای فیلتر هدف عمومی تعریف شده توسط اهداف برنامه زیر که در اینجا ذکر شده است، از قبل بارگیری کنید.
  • [ 3.2.3.1 /H-SR-1] برای از پیش بارگذاری یک برنامه ایمیل که می تواند ACTION_SENDTO یا ACTION_SEND یا ACTION_SEND_MULTIPLE قصد ارسال ایمیل را مدیریت کند، اکیداً توصیه می شود.
  • [ 3.4 .1/H-0-1] باید اجرای کاملی از android.webkit.Webview API را ارائه دهد.
  • [ 3.4 .2/H-0-1] باید شامل یک برنامه مرورگر مستقل برای مرور وب کاربران عمومی باشد.
  • [ 3.8 .1/H-SR-1] برای اجرای یک راه‌انداز پیش‌فرض که از پین کردن میان‌برها، ویجت‌ها و ویژگی‌های ویجت در برنامه پشتیبانی می‌کند، به شدت توصیه می‌شود.
  • [ 3.8 .1/H-SR-2] برای پیاده‌سازی یک راه‌انداز پیش‌فرض که دسترسی سریع به میانبرهای اضافی ارائه‌شده توسط برنامه‌های شخص ثالث را از طریق ShortcutManager API فراهم می‌کند، اکیداً توصیه می‌شود.
  • [ 3.8 .1/H-SR-3] اکیداً توصیه می‌شود که یک برنامه راه‌انداز پیش‌فرض که نشان‌ها را برای نمادهای برنامه نشان می‌دهد، داشته باشند.
  • [ 3.8 .2/H-SR-1] برای پشتیبانی از ویجت های برنامه شخص ثالث به شدت توصیه می شود.
  • [ 3.8 .3/H-0-1] باید به برنامه های شخص ثالث اجازه دهد تا از طریق کلاس های Notification و NotificationManager API کاربران را از رویدادهای قابل توجه مطلع کنند.
  • [ 3.8 .3/H-0-2] باید از اعلان های غنی پشتیبانی کند.
  • [ 3.8 .3/H-0-3] باید از اعلان‌های heads-up پشتیبانی کند.
  • [ 3.8 .3/H-0-4] باید شامل یک سایه اعلان باشد که به کاربر امکان کنترل مستقیم (مثلاً پاسخ، به تعویق انداختن، رد کردن، مسدود کردن) اعلان‌ها را از طریق هزینه‌های کاربر مانند دکمه‌های عمل یا پانل کنترل همانطور که اجرا می‌کند، می‌دهد. در AOSP
  • [ 3.8 .3/H-0-5] باید انتخاب های ارائه شده از طریق RemoteInput.Builder setChoices() در سایه اعلان نمایش دهد.
  • [ 3.8 .3/H-SR-1] اکیداً توصیه می شود که اولین انتخاب ارائه شده از طریق RemoteInput.Builder setChoices() در سایه اعلان و بدون تعامل اضافی با کاربر نمایش داده شود.
  • [ 3.8 .3/H-SR-2] اکیداً توصیه می‌شود که همه گزینه‌های ارائه شده از طریق RemoteInput.Builder setChoices() در سایه اعلان‌ها هنگامی که کاربر همه اعلان‌ها را در سایه اعلان گسترش می‌دهد، نمایش داده شود.
  • [ 3.8 .3.1/H-SR-1] برای نمایش اقداماتی که Notification.Action.Builder.setContextual برای آنها به عنوان true در خط با پاسخ های نمایش داده شده توسط Notification.Remoteinput.Builder.setChoices تنظیم شده است، قویاً توصیه می شود.
  • [ 3.8 .4/H-SR-1] اکیداً توصیه می شود یک دستیار را روی دستگاه اجرا کنید تا عمل Assist را انجام دهد.

اگر پیاده سازی های دستگاه دستی از اعلان های MediaStyle پشتیبانی می کنند:

  • [ 3.8 .3.1/H-SR-2] به شدت توصیه می‌شود تا یک مقرون به صرفه برای کاربر (به عنوان مثال، سوئیچ‌کننده خروجی) که از رابط کاربری سیستم قابل دسترسی است که به کاربران امکان می‌دهد بین مسیرهای رسانه‌ای موجود (مثلاً دستگاه‌های بلوتوث و مسیرهای ارائه‌شده به) سوئیچ کنند، ارائه کنند. MediaRouter2Manager ) زمانی که یک برنامه اعلان MediaStyle را با توکن MediaSession ارسال می کند.

اگر پیاده‌سازی‌های دستگاه از جمله کلید ناوبری عملکرد اخیر که در بخش 7.2.3 توضیح داده شده است، رابط را تغییر دهد، آنها:

  • [ 3.8 .3/H-1-1] باید رفتار پین کردن صفحه را اجرا کند و منوی تنظیمات را برای تغییر دادن ویژگی در اختیار کاربر قرار دهد.

اگر پیاده‌سازی‌های دستگاه دستی از عمل Assist پشتیبانی می‌کنند، آنها:

  • [ 3.8 .4/H-SR-2] اکیداً توصیه می شود از فشار طولانی کلید HOME به عنوان تعامل تعیین شده برای راه اندازی برنامه کمکی همانطور که در بخش 7.2.3 توضیح داده شده است، استفاده کنید. باید برنامه کمکی انتخاب شده توسط کاربر را راه‌اندازی کند، به عبارت دیگر برنامه‌ای که VoiceInteractionService یا فعالیتی را که هدف ACTION_ASSIST را مدیریت می‌کند، اجرا می‌کند.

اگر پیاده‌سازی‌های دستگاه دستی از conversation notifications پشتیبانی می‌کنند و آن‌ها را در بخش جداگانه‌ای از اعلان‌های هشدار و بدون مکالمه گروه‌بندی می‌کنند، آنها:

  • [ 3.8 .4/H-1-1]* باید اعلان‌های مکالمه را قبل از اعلان‌های غیرمکالمه نمایش دهد، به استثنای اعلان‌های سرویس پیش‌زمینه و اعلان‌های اهمیت: بالا .

اگر پیاده‌سازی‌های دستگاه Android Handheld از صفحه قفل پشتیبانی می‌کنند، آنها:

  • [ 3.8 .10/H-1-1] باید اعلان‌های صفحه قفل از جمله الگوی اعلان رسانه را نمایش دهد.

اگر پیاده سازی های دستگاه دستی از صفحه قفل ایمن پشتیبانی می کنند، آنها:

  • [ 3.9 /H-1-1] باید طیف کاملی از خط‌مشی‌های مدیریت دستگاه تعریف‌شده در اسناد Android SDK را اجرا کند.

اگر پیاده‌سازی‌های دستگاه دستی شامل پشتیبانی از ControlsProviderService و Control API باشد و به برنامه‌های شخص ثالث اجازه انتشار کنترل‌های دستگاه را بدهد، آن‌ها:

  • [ 3.8 .16/H-1-1] باید ویژگی flag android.software.controls را اعلام کرده و آن را روی true تنظیم کند.
  • [ 3.8 .16/H-1-2] باید امکان افزودن، ویرایش، انتخاب و اجرای کنترل های دستگاه مورد علاقه کاربر را از کنترل های ثبت شده توسط برنامه های شخص ثالث از طریق ControlsProviderService و Control API ها فراهم کند. .
  • [ 3.8 0.16/H-1-3] باید دسترسی به این مقرون به صرفه کاربر را در سه تعامل از یک راه‌انداز پیش‌فرض فراهم کند.
  • [ 3.8 .16/H-1-4] باید نام و نماد هر برنامه شخص ثالثی که کنترل‌ها را از طریق ControlsProviderService API و همچنین فیلدهای مشخص شده توسط Control APIها ارائه می‌کند، در این اطلاعات کاربر به دقت ارائه شود.

  • [ 3.8 .16/H-1-5] باید امکانی را برای کاربر فراهم کند تا از کنترل‌های دستگاه‌های بی‌اهمیت تعیین‌شده برنامه از کنترل‌های ثبت‌شده توسط برنامه‌های شخص ثالث از طریق ControlsProviderService و Control Control.isAuthRequired API استفاده کند.

  • [ 3.8 .16/H-1-6] پیاده‌سازی دستگاه باید به‌طور دقیق توانایی کاربر را به شرح زیر ارائه کند:

    • اگر دستگاه config_supportsMultiWindow=true تنظیم کرده باشد و برنامه فوق داده META_DATA_PANEL_ACTIVITY در اعلان ControlsProviderService ، از جمله ComponentName یک فعالیت معتبر (همانطور که توسط API تعریف شده است) اعلام کند، برنامه باید فعالیت مذکور را در این کاربر تعبیه کند.
    • اگر برنامه فوق داده META_DATA_PANEL_ACTIVITY را اعلام نکند، باید فیلدهای مشخص شده را همانطور که توسط ControlsProviderService API ارائه شده است و همچنین فیلدهای مشخص شده توسط Control API ارائه شود.
  • [ 3.8 .16/H-1-7] اگر برنامه فوق داده را META_DATA_PANEL_ACTIVITY اعلام کند، باید مقدار تنظیم تعریف شده در [3.8.16/H-1-5] را با استفاده از EXTRA_LOCKSCREEN_ALLOW_TRIVIAL_CONTROLS هنگام راه‌اندازی فعالیت ارسال کند.

برعکس، اگر پیاده‌سازی‌های دستگاه دستی چنین کنترل‌هایی را اجرا نکنند، آنها:

اگر پیاده‌سازی‌های دستگاه دستی در حالت کار قفل اجرا نمی‌شوند، وقتی محتوا در کلیپ‌بورد کپی می‌شود، آنها:

  • [3.8.17/H-1-1] باید تأییدیه ای به کاربر ارائه کند که داده ها در کلیپ بورد کپی شده اند (به عنوان مثال، یک تصویر کوچک یا هشدار از "محتوا کپی شده است."). به‌علاوه، در اینجا نشانه‌ای در نظر بگیرید که آیا داده‌های کلیپ‌بورد بین دستگاه‌ها همگام‌سازی می‌شوند یا خیر.

پیاده سازی دستگاه های دستی:

  • [ 3.10 /H-0-1] باید از خدمات دسترسی شخص ثالث پشتیبانی کند.
  • [ 3.10 /H-SR-1] اکیداً توصیه می‌شود که سرویس‌های دسترس‌پذیری را در دستگاه از قبل بارگذاری کنند که با عملکردهای دسترسی سوئیچ و TalkBack (برای زبان‌هایی که توسط موتور از پیش نصب شده تبدیل متن به گفتار پشتیبانی می‌شوند) قابل مقایسه یا فراتر از آن است. پروژه منبع باز تاک بک
  • [ 3.11 /H-0-1] باید از نصب موتورهای TTS شخص ثالث پشتیبانی کند.
  • [ 3.11 /H-SR-1] اکیداً توصیه می‌شود که موتور TTS را شامل شود که از زبان‌های موجود در دستگاه پشتیبانی می‌کند.
  • [ 3.13 /H-SR-1] اکیداً توصیه می‌شود که شامل یک مؤلفه رابط کاربری تنظیمات سریع باشد.

اگر پیاده‌سازی‌های دستگاه دستی Android پشتیبانی از FEATURE_BLUETOOTH یا FEATURE_WIFI را اعلام کنند، آنها:

  • [ 3.16 /H-1-1] باید از ویژگی جفت شدن دستگاه همراه پشتیبانی کند.

اگر عملکرد پیمایش به‌عنوان یک عمل مبتنی بر اشاره روی صفحه ارائه شود:

  • [ 7.2 .3/H] منطقه تشخیص حرکت برای عملکرد Home نباید از پایین صفحه در ارتفاع بالاتر از 32 dp باشد.

اگر پیاده سازی دستگاه های دستی یک عملکرد ناوبری را به عنوان یک ژست از هر نقطه در لبه های چپ و راست صفحه ارائه دهید:

  • [ 7.2 .3/h-0-1] منطقه ژست عملکرد ناوبری باید از هر طرف کمتر از 40 dp باشد. منطقه ژست باید به طور پیش فرض 24 دسی پی در پی باشد.

اگر پیاده سازی دستگاه های دستی از یک صفحه قفل ایمن پشتیبانی می کند و بیشتر یا مساوی با 2 گیگابایت حافظه در دسترس برای هسته و فضای کاربری ها ، آنها: آنها:

  • [3.9/H-1-2] باید پشتیبانی از پروفایل های مدیریت شده را از طریق پرچم android.software.managed_users اعلام کند.

اگر پیاده سازی دستگاه های دستی Android پشتیبانی از دوربین را از طریق android.hardware.camera.any آنها اعلام کنید:

اگر برنامه تنظیمات اجرای دستگاه عملکردی تقسیم ، با استفاده از تعبیه فعالیت را پیاده سازی می کند ، پس آنها:

اگر پیاده سازی دستگاه به کاربران اجازه می دهد تا از هر نوع تماس برقرار کنند ، آنها

2.2.4. عملکرد و قدرت

  • [ 8.1 /H-0-1] تأخیر قاب ثابت . تأخیر قاب متناقض یا تأخیر در ارائه فریم ها نباید بیشتر از 5 فریم در ثانیه اتفاق بیفتد و در یک ثانیه باید زیر 1 فریم باشد.
  • [ 8.1 /H-0-2] تأخیر در رابط کاربری . اجرای دستگاه باید با پیمایش لیستی از ورودی های لیست 10K که توسط مجموعه تست سازگاری اندرویدی (CTS) در کمتر از 36 ثانیه تعریف شده است ، تجربه کاربر تأخیر کم را تضمین کند.
  • [ 8.1 /H-0-3] تعویض کار . هنگامی که چندین برنامه راه اندازی شده است ، پس از راه اندازی مجدد یک برنامه در حال اجرا دوباره باید دوباره اجرا شود.

پیاده سازی دستگاه های دستی:

  • [ 8.2 /H-0-1] باید عملکرد نوشتن متوالی حداقل 5 مگابایت در ثانیه را تضمین کند.
  • [ 8.2 /H-0-2] باید عملکرد نوشتن تصادفی حداقل 0.5 مگابایت در ثانیه را تضمین کند.
  • [ 8.2 /H-0-3] باید عملکرد خواندن متوالی حداقل 15 مگابایت در ثانیه را تضمین کند.
  • [ 8.2 /H-0-4] باید عملکرد خواندن تصادفی حداقل 3.5 مگابایت در ثانیه را تضمین کند.

اگر پیاده سازی دستگاه های دستی شامل ویژگی هایی برای بهبود مدیریت انرژی دستگاه است که در AOSP گنجانده شده یا ویژگی هایی را که در AOSP گنجانده شده است ، گسترش می دهند: آنها:

  • [ 8.3 /H-1-1] برای فعال کردن و غیرفعال کردن ویژگی محافظ باتری باید هزینه کاربر را فراهم کند.
  • [ 8.3 /H-1-2] باید هزینه کاربر را برای نمایش کلیه برنامه هایی که از حالت آماده به کار برنامه معاف هستند و حالت های صرفه جویی در مصرف برق را ارائه می دهند ، فراهم کند.

پیاده سازی دستگاه های دستی:

  • [ 8.4 /H-0-1] باید یک پروفایل قدرت در هر جزء را فراهم کند که مقدار مصرف فعلی را برای هر مؤلفه سخت افزاری و تخلیه تقریبی باتری ناشی از قطعات در طول زمان تعریف کند ، همانطور که در سایت پروژه منبع باز اندروید ثبت شده است.
  • [ 8.4 /H-0-2] باید تمام مقادیر مصرف برق را در ساعات میلی لیتر (MAH) گزارش دهد.
  • [ 8.4 /H-0-3] باید مصرف انرژی CPU را در مورد UID هر فرآیند گزارش دهد. پروژه منبع باز اندروید از طریق اجرای ماژول هسته uid_cputime با این نیاز برآورده می شود.
  • [ 8.4 /H-0-4] باید این استفاده از برق را از طریق دستور Shell adb shell dumpsys batterystats به توسعه دهنده برنامه در دسترس قرار دهد.
  • [ 8.4 /h] در صورت عدم امکان استفاده از انرژی مؤلفه سخت افزار به یک برنامه ، باید به خود مؤلفه سخت افزار نسبت داده شود.

اگر پیاده سازی دستگاه های دستی شامل یک صفحه نمایش یا خروجی ویدیو باشد ، آنها:

  • [ 8.4 /H-1-1] باید از android.intent.action.POWER_USAGE_SUMMARY هدف خودداری کنید و یک منوی تنظیمات را نمایش دهید که این استفاده از قدرت را نشان می دهد.

پیاده سازی دستگاه های دستی:

  • [ 8.5 /H-0-1] باید برای دیدن کلیه برنامه ها با خدمات پیش زمینه فعال یا مشاغل مبتنی بر کاربر ، از جمله مدت زمان هر یک از این خدمات ، از زمان شروع به شرح در سند SDK ، یک هزینه کاربر را فراهم کند.

  • [ 8.5 /h-0-2] باید برای متوقف کردن برنامه ای که یک سرویس پیش زمینه یا یک کار توسط کاربر را اجرا می کند ، هزینه کاربر را فراهم کند.

2.2.5. مدل امنیتی

پیاده سازی دستگاه های دستی:

  • [9/H-0-1] باید ویژگی android.hardware.security.model.compatible را اعلام کند.
  • [ 9.1 /H-0-1] باید به برنامه های شخص ثالث اجازه دهد تا از طریق android.permission.PACKAGE_USAGE_STATS به آمار استفاده دسترسی پیدا کنند و یک مکانیزم قابل دسترسی کاربر را برای اعطای یا لغو دسترسی به چنین برنامه هایی در پاسخ به android.settings.ACTION_USAGE_ACCESS_SETTINGS فراهم کنند. android.settings.ACTION_USAGE_ACCESS_SETTINGS قصد.

شروع نیازهای جدید برای اندروید 15

پیاده سازی دستگاه باید پشتیبانی از android.software.credentials را اعلام کند و:

  • [9/H-0-2] باید از android.settings.CREDENTIAL_PROVIDER قصد داشته باشد تا یک ارائه دهنده ارجح را برای مدیر اعتبار انتخاب کند. این ارائه دهنده برای Autofill فعال خواهد شد و همچنین مکان پیش فرض برای ذخیره اعتبار جدید وارد شده از طریق مدیر اعتبار خواهد بود.

  • [9/H-0-3] باید حداقل از 2 ارائه دهنده اعتبار همزمان پشتیبانی کند و برای فعال کردن یا غیرفعال کردن ارائه دهندگان ، هزینه کاربر را در برنامه تنظیم فراهم کند.

پایان الزامات جدید

اگر پیاده سازی های دستگاه پشتیبانی از android.hardware.telephony را اعلام می کنند ، آنها:

  • [ 9.5 /H-1-1] نباید UserManager.isHeadlessSystemUserMode را true تنظیم کند.

پیاده سازی دستگاه های دستی:

  • [ 9.11 /H-0-2] باید از اجرای کلیدی با یک محیط اجرای جدا شده پشتیبان تهیه کنید.
  • [ 9.11 /H-0-3] باید الگوریتم های رمزنگاری RSA ، AES ، ECDSA و HMAC و عملکردهای هش Family MD5 ، SHA-1 و SHA-2 را برای پشتیبانی صحیح از الگوریتم های پشتیبانی شده از سیستم Keystore Android در منطقه ای انجام دهند که به طور ایمن از کد اجرا شده روی هسته و بالاتر جدا شده است. جداسازی ایمن باید تمام مکانیسم های بالقوه را که توسط آن هسته یا کد فضای کاربری ممکن است به وضعیت داخلی محیط جدا شده ، از جمله DMA دسترسی داشته باشد ، مسدود کند. پروژه منبع باز اندرویدی بالادست (AOSP) با استفاده از اجرای قابل اعتماد ، این نیاز را برآورده می کند ، اما یک راه حل مبتنی بر ARM TrustZone یا یک شخص ثالث اجرای ایمن یک جداسازی مناسب مبتنی بر Hypervisor گزینه های جایگزین است.
  • [ 9.11 /H-0-4] باید احراز هویت صفحه قفل را در محیط اجرای جدا شده انجام داده و فقط در صورت موفقیت ، از کلیدهای محدود به تأیید اعتبار استفاده کنید. اعتبارنامه صفحه قفل باید به گونه ای ذخیره شود که فقط به محیط اجرای جدا شده اجازه می دهد تا احراز هویت صفحه قفل را انجام دهد. پروژه منبع باز اندرویدی بالادست ، لایه انتزاع سخت افزار Gatekeeper (HAL) و قابل اعتماد را فراهم می کند که می تواند برای برآورده کردن این نیاز استفاده شود.

شروع نیازهای جدید برای اندروید 15

  • [ 9.11 /H-0-5] باید از تأیید کلید پشتیبانی کند که کلید امضاء تأیید شده توسط سخت افزار ایمن محافظت می شود و امضای آن در سخت افزار ایمن انجام می شود. کلیدهای امضای تأیید باید در تعداد کافی از دستگاه ها به اشتراک گذاشته شوند تا از استفاده از کلیدها به عنوان شناسه دستگاه دائمی جلوگیری شود. یکی از راه های تأمین این شرط ، به اشتراک گذاشتن همان کلید تأیید است ، مگر اینکه حداقل 100000 واحد از یک SKU معین تولید شود. اگر بیش از 100000 واحد SKU تولید شود ، ممکن است برای هر 100000 واحد از یک کلید متفاوت استفاده شود.

پایان الزامات جدید

توجه داشته باشید که اگر اجرای دستگاه در حال حاضر بر روی نسخه قبلی Android راه اندازی شده باشد ، چنین دستگاهی از الزام داشتن یک کلیدی پشتیبانی شده توسط یک محیط اجرای جدا شده معاف است و از تأیید کلید پشتیبانی می کند ، مگر اینکه ویژگی android.hardware.fingerprint را اعلام کند که کدام یک از ویژگی های Android. نیاز به یک کلبه کلیدی دارد که توسط یک محیط اعدام منزوی پشتیبانی می شود.

هنگامی که پیاده سازی دستگاه های دستی از صفحه قفل ایمن پشتیبانی می کند ، آنها:

  • [ 9.11 /H-1-1] باید به کاربر اجازه دهد کوتاهترین زمان خواب را انتخاب کند ، یعنی زمان انتقال از قفل به حالت قفل شده ، به عنوان 15 ثانیه یا کمتر.
  • [ 9.11 /H-1-2] باید برای مخفی کردن اعلان ها و غیرفعال کردن کلیه اشکال تأیید اعتبار ، به جز احراز هویت اصلی که در صفحه قفل امن 9.11.1 شرح داده شده است ، هزینه کاربر را فراهم کند. AOSP با نیاز به عنوان حالت قفل مطابقت دارد.

اگر پیاده سازی دستگاه دارای صفحه قفل ایمن باشد و یک یا چند عامل اعتماد را شامل شود ، که API سیستم TrustAgentService را پیاده سازی می کند ، آنها:

  • [ 9.11.1 /H-1-1] باید کاربر را برای یکی از روشهای تأیید اعتبار اولیه توصیه شده (به عنوان مثال: پین ، الگوی ، رمز عبور) بیشتر از هر 72 ساعت به چالش بکشد.

اگر پیاده سازی دستگاه های دستی شامل چندین کاربر باشد و پرچم ویژگی android.hardware.telephony را اعلام نکنید ، آنها:

  • [ 9.5 /H-2-1] باید از پروفایل های محدود پشتیبانی کند ، ویژگی ای که به صاحبان دستگاه اجازه می دهد کاربران اضافی و قابلیت های آنها را در دستگاه مدیریت کنند. با پروفایل های محدود ، صاحبان دستگاه می توانند به سرعت محیط های جداگانه ای را برای کاربران اضافی تنظیم کنند ، با این امکان که بتوانند محدودیت های ریز ریز در برنامه هایی را که در آن محیط ها موجود است ، مدیریت کنند.

اگر پیاده سازی دستگاه های دستی شامل چندین کاربر باشد و پرچم ویژگی android.hardware.telephony را اعلام کنید ، آنها:

  • [ 9.5 /H-3-1] نباید از پروفایل های محدود پشتیبانی کند بلکه باید با اجرای AOSP کنترل ها هماهنگ باشد تا سایر کاربران را از دسترسی به تماس های صوتی و پیام کوتاه فعال یا غیرفعال کند.

اگر پیاده سازی دستگاه های دستی UserManager.isHeadlessSystemUserMode را به true تنظیم کنید.

  • [ 9.5 /H-4-1] نباید شامل پشتیبانی از EUICC ها ، و نه برای ESIM با قابلیت فراخوانی باشد.
  • [ 9.5 /H-4-2] نباید پشتیبانی از android.hardware.telephony را اعلام کند.

Android ، از طریق سیستم API VoiceInterActionService از مکانیسمی برای تشخیص ایمن همیشه در مورد Hot-Word بدون نشانه دسترسی MIC و تشخیص همیشه پرس و جو ، بدون نشانه دسترسی میکروفون یا دوربین پشتیبانی می کند.

شروع نیازهای جدید برای اندروید 15

تنظیمات محدود

تنظیمات محدود به کاربر هشدارهای قابل مشاهده را در اختیار کاربر قرار می دهد و تأیید کاربر را به منظور اعطای مجوز برای هر برنامه ای که در آن وجود دارد ، درخواست می کند:

  • نصب پس از بارگیری از طریق یک برنامه (به عنوان مثال ، یک برنامه پیام رسانی یا مرورگر) به غیر از یک برنامه "فروشگاه برنامه" که توسط PackageManager به عنوان PACKAGE_DOWNLOADED_FILE مشخص شده است.
  • نصب از یک فایل محلی (به عنوان مثال ، برنامه در کنار هم قرار گرفت) توسط PackageManager به عنوان PACKAGE_SOURCE_LOCAL_FILE مشخص شد.

برای هر یک از مجوزهای اجباری و شناسه های مرتبط با آنها ذکر شده در [9.8/H-0-5] در زیر.

چنین برنامه هایی برای الزامات ذکر شده در این بخش "برنامه های تحت پوشش" برچسب گذاری شده اند.

پیاده سازی دستگاه:

  • [9.8/h-0-1] باید تنظیمات محدود را مطابق آنچه در بالا ذکر شد برای موارد زیر اجرا کند:

    • مجوزهای ویژه
      • قابلیت دسترسی ( AppOpsManager.OPSTR_BIND_ACCESSIBILITY_SERVICE )
      • شنونده اعلان ( AppOpsManager.OPSTR_ACCESS_NOTIFICATIONS )
      • برنامه های مدیر دستگاه ( Manifest.permission.BIND_DEVICE_ADMIN .
      • نمایش بیش از برنامه های دیگر ( AppOpsManager.OPSTR_SYSTEM_ALERT_WINDOW )
      • دسترسی به استفاده ( AppOpsManager.OPSTR_GET_USAGE_STATS )
    • نقش ها (برنامه های پیش فرض)
      • Dialer ( RoleManager.ROLE_DIALER )
      • پیام کوتاه ( RoleManager.ROLE_SMS )
    • مجوزهای زمان اجرا
      • SMS Runtime ( Manifest.permission_group.SMS )
  • [9.8/H-0-2] باید تنظیمات محدود را به عنوان پیش فرض فعال کند و به شدت توصیه می شود هیچ هزینه کاربری را نداشته باشد که به کاربر اجازه می دهد تنظیمات محدود را برای همه برنامه ها غیرفعال کند.

  • [9.8/H-0-3] باید قبل از اعطای هر یک از مجوزهای اجباری ، تأیید کاربر برای هر برنامه تحت پوشش حاصل شود.

  • [9.8/H-0-4] فقط باید به تأیید کاربر اجازه دهد تا تنظیمات محدود شده را از صفحه AppInfo برنامه تحت پوشش ، با استفاده از API EnhancedConfirmationManager بدست آورد.

  • [9.8/H-0-5] به شدت توصیه می شود که با همه مجوزهای ویژه با ادغام و تماس با EnhancedConfirmationManager ، برای تعیین پویا تعیین کنید که آیا آنها یک تنظیم محدود هستند یا خیر.

    • هشدارها و یادآوری ها: AppOpsManager.OPSTR_SCHEDULE_EXACT_ALARM
    • همه دسترسی به پرونده: AppOpsManager.OPSTR_MANAGE_EXTERNAL_STORAGE
    • نمایش بیش از برنامه های دیگر: AppOpsManager.OPSTR_SYSTEM_ALERT_WINDOW
    • برنامه های ناشناخته را نصب کنید: AppOpsManager.OPSTR_REQUEST_INSTALL_PACKAGES
    • مدیریت رسانه: AppOpsManager.OPSTR_MANAGE_MEDIA
    • تنظیمات سیستم: AppOpsManager.OPSTR_WRITE_SETTINGS
    • تصویر در تصویر: AppOpsManager.OPSTR_PICTURE_IN_PICTURE
    • صفحه را روشن کنید: AppOpsManager.OPSTR_TURN_SCREEN_ON
    • اعلان های تمام صفحه: AppOpsManager.OPSTR_USE_FULL_SCREEN_INTENT
    • کنترل Wi-Fi: AppOpsManager.OPSTR_CHANGE_WIFI_STATE
    • قابلیت دسترسی: AppOpsManager.OPSTR_BIND_ACCESSIBILITY_SERVICE
    • شنونده اعلان: AppOpsManager.OPSTR_ACCESS_NOTIFICATIONS
    • دسترسی به استفاده: AppOpsManager.OPSTR_GET_USAGE_STATS
    • مدیر دستگاه: Manifest.permission.BIND_DEVICE_ADMIN
    • مزاحم نشوید: Manifest.permission.MANAGE_NOTIFICATIONS

پایان الزامات جدید

اگر پیاده سازی دستگاه های دستی از سیستم API HotwordDetectionService یا مکانیسم دیگری برای تشخیص هات کلمه بدون نشانه دسترسی به MIC پشتیبانی کند ، آنها:

  • [9.8/H-1-1] باید اطمینان حاصل کند که سرویس تشخیص کلمه Hot-Word فقط می تواند داده ها را به سیستم ، ContentCaptureService یا سرویس تشخیص گفتار در دستگاه ایجاد شده توسط SpeechRecognizer#createOnDeviceSpeechRecognizer() .
  • [9.8/H-1-2] باید اطمینان حاصل کنید که سرویس تشخیص کلمه Hot-Word فقط می تواند داده های صوتی MIC یا داده های حاصل از آن را از طریق API HotwordDetectionService به سرور سیستم منتقل کند ، یا از طریق ContentCaptureManager API ContentCaptureManager را به ContentCaptureService منتقل کند.
  • [9.8/H-1-3] نباید صوتی MIC را که بیش از 30 ثانیه برای درخواست شخصی برای تغییر سخت افزار به سرویس تشخیص کلمه Hotword است ، عرضه کند.
  • [9.8/H-1-4] برای درخواست فردی به سرویس تشخیص Word Hot-Word نباید MIC بافر قدیمی تر از 8 ثانیه را تأمین کند.
  • [9.8/H-1-5] نباید MIC بافر را از 30 ثانیه مسن تر از 30 ثانیه به سرویس تعامل صوتی یا نهاد مشابه عرضه کند.
  • [9.8/H-1-6] نباید اجازه دهد بیش از 100 بایت داده (به استثنای جریان های صوتی) از سرویس تشخیص کلمه Hot-Word در هر نتیجه موفقیت آمیز HOTWORD منتقل شود.
  • [9.8/H-1-7] نباید اجازه دهد بیش از 5 بیت داده از سرویس تشخیص کلمه هات در هر نتیجه منفی کلمه منفی منتقل شود.
  • [9.8/H-1-8] فقط باید انتقال داده ها را از سرویس تشخیص HotWord در درخواست اعتبار سنجی HotWord از سرور سیستم فراهم کند.
  • [9.8/H-1-9] نباید به یک برنامه قابل نصب کاربر اجازه دهد تا سرویس تشخیص کلمه HotWord را ارائه دهد.
  • [9.8/H-1-10] نباید در داده های کمی در مورد استفاده از میکروفون توسط سرویس تشخیص کلمه Hot-Word ، سطح داده شود.
  • [9.8/H-1-11] باید تعداد بایت های موجود در هر انتقال را از سرویس تشخیص HotWord وارد کند تا امکان بازرسی برای محققان امنیتی فراهم شود.
  • [9.8/H-1-12] باید از یک حالت اشکال زدایی پشتیبانی کند که محتویات خام هر انتقال را از سرویس تشخیص کلمه هات وارد کند تا امکان بازرسی برای محققان امنیتی را فراهم کند.
  • [9.8/H-1-14] باید همانطور که در بخش 9.8.2 توضیح داده شده است ، هنگامی که یک نتیجه کلمه کلمه ای موفق به سرویس تعامل صوتی یا نهاد مشابه منتقل می شود ، نشانگر میکروفون را نشان دهد.

  • [9.8/H-1-15] باید اطمینان حاصل کند که جریان های صوتی ارائه شده در نتایج موفقیت آمیز کلمه Hot-Word یک طرفه از سرویس تشخیص Word Word به سرویس تعامل صوتی منتقل می شوند.

  • [9.8/H-SR-1] به شدت توصیه می شود قبل از تنظیم برنامه به عنوان ارائه دهنده سرویس تشخیص HotWord ، به کاربران اطلاع دهید.

  • [9.8/H-SR-2] به شدت توصیه می شود که از انتقال داده های بدون ساختار خارج از سرویس تشخیص کلمه Hot-Word استفاده کنید.

  • [9.8/H-SR-3] به شدت توصیه می شود که حداقل یک بار در هر ساعت یا هر 30 رویداد سخت افزاری ، هر کدام از اولین بار ، هر کدام از اولین بار ، مراحل میزبانی سرویس تشخیص Hot-Word را مجدداً راه اندازی کنید.

اگر پیاده سازی دستگاه شامل برنامه ای است که از سیستم API HotwordDetectionService یا مکانیسم مشابه برای تشخیص هات کلمه بدون نشانه استفاده از MIC استفاده می کند ، برنامه:

  • [9.8/H-2-1] باید برای هر عبارت hotword پشتیبانی شده ، اخطار صریح را به کاربر ارائه دهد.
  • [9.8/H-2-2] نباید داده های صوتی خام یا داده های حاصل از آن را از طریق سرویس تشخیص کلمه Hot-Word حفظ کند.
  • [9.8/H-2-3] نباید از سرویس تشخیص کلمه HotWord ، داده های صوتی ، داده هایی که می توان برای بازسازی (کاملاً یا جزئی) استفاده کرد ، انتقال داد (به طور کامل یا جزئی) محتوای صوتی یا صوتی غیر مرتبط با خود HOTWORT ، به جز ContentCaptureService یا سرویس تشخیص گفتار در دستگاه.

اگر پیاده سازی دستگاه های دستی از سیستم API VisualQueryDetectionService یا مکانیسم دیگری برای تشخیص پرس و جو بدون میکروفون و/یا نشانگر دسترسی به دوربین پشتیبانی می کند ، آنها:

  • [9.8/H-3-1] باید اطمینان حاصل کند که سرویس تشخیص پرس و جو فقط می تواند داده ها را به سیستم یا ContentCaptureService یا سرویس تشخیص گفتار در مورد دستگاه منتقل کند (ایجاد شده توسط SpeechRecognizer#createOnDeviceSpeechRecognizer() ).
  • [9.8/H-3-2] نباید اجازه دهد هیچ اطلاعات صوتی یا تصویری از طریق VisualQueryDetectionService منتقل شود ContentCaptureService به جز سرویس تشخیص گفتار یا خدمات در دستگاه.
  • [9.8/H-3-3] باید هنگامی که دستگاه قصد دارد کاربر را برای تعامل با برنامه دستیار دیجیتال (به عنوان مثال با تشخیص حضور کاربر از طریق دوربین) ، یک اطلاعیه کاربر را در UI سیستم نمایش دهد.
  • [9.8/H-3-4] باید یک نشانگر میکروفون را نمایش داده و پرس و جو کاربر شناسایی شده را در UI درست پس از شناسایی پرس و جو کاربر نمایش دهید.
  • [9.8/H-3-5] نباید به یک برنامه قابل نصب کاربر اجازه دهد تا سرویس تشخیص پرس و جو بصری را ارائه دهد.

اگر پیاده سازی دستگاه های دستی android.hardware.microphone را اعلام کنید ، آنها:

  • [ 9.8.2 /h-4-1] باید هنگام دسترسی به داده های صوتی از میکروفون ، نشانگر میکروفون را نمایش دهد ، اما نه وقتی میکروفون فقط توسط HotwordDetectionService ، SOURCE_HOTWORD ، ContentCaptureService یا برنامه هایی که نقش های نامیده شده در بخش را دارند ، قابل دسترسی است. 9.1 با شناسه CDD [C-4-X].
  • [ 9.8.2 /H-4-2] باید لیست برنامه های اخیر و فعال را با استفاده از میکروفون به عنوان بازگشت از PermissionManager.getIndicatorAppOpUsageData() به همراه هر پیام انتساب مرتبط با آنها نمایش دهد.
  • [ 9.8.2 /H-4-3] نباید نشانگر میکروفون را برای برنامه های سیستم که دارای رابط های کاربر قابل مشاهده یا تعامل کاربر هستند ، پنهان کند.
  • [ 9.8.2 /H-4-4] باید لیست برنامه های اخیر و فعال را با استفاده از میکروفون به عنوان بازگشت از PermissionManager.getIndicatorAppOpUsageData() به همراه هر پیام انتساب مرتبط با آنها نمایش دهد.

اگر پیاده سازی دستگاه های دستی android.hardware.camera.any را اعلام کنید ، آنها:

  • [ 9.8.2 /H-5-1] باید هنگام دسترسی به داده های دوربین زنده ، نشانگر دوربین را نمایش دهد ، اما نه وقتی دوربین فقط توسط برنامه (ها) که نقش های نامیده شده در بخش 9.1 را با شناسه CDD به دست می آورد ، دسترسی پیدا می کند. [C-4-X].
  • [ 9.8.2 /H-5-2] باید برنامه های اخیر و فعال را با استفاده از دوربین به عنوان بازگشت از PermissionManager.getIndicatorAppOpUsageData() ، به همراه هر پیام انتساب مرتبط با آنها نمایش دهد.
  • [ 9.8.2 /H-5-3] نباید نشانگر دوربین را برای برنامه های سیستم که دارای رابط های کاربر قابل مشاهده یا تعامل مستقیم کاربر هستند ، پنهان کند.

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Boot تأیید شده ویژگی ای است که یکپارچگی نرم افزار دستگاه را تضمین می کند. اگر پیاده سازی دستگاه از ویژگی پشتیبانی می کند ، آنها:

  • [ 9.10 /H-1-1] باید تمام پارتیشن های فقط خواندنی نصب شده در طول توالی بوت اندرویدی را تأیید کند ، و VBMETA Digest باید تمام این پارتیشن های تأیید شده را در محاسبه آن شامل شود.

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2.2.6. ابزارهای توسعه دهنده و سازگاری گزینه ها

پیاده سازی دستگاه های دستی (* برای رایانه لوحی قابل اجرا نیست):

  • [ 6.1 /H-0-1]* باید از فرمان پوسته cmd testharness پشتیبانی کند.

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پیاده سازی دستگاه های دستی (* برای رایانه لوحی قابل اجرا نیست) :

  • پرفتو
    • [ 6.1 /H-0-2] * باید باینری A /system/bin/perfetto در معرض کاربر پوسته قرار دهید که Cmdline با مستندات Perfetto مطابقت دارد.
    • [ 6.1 /H-0-3] * باینری Perfetto باید به عنوان ورودی یک پیکربندی ProtoBUF که مطابق با طرحواره تعریف شده در مستندات Perfetto است ، بپذیرد.
    • [ 6.1 /H-0-4] * باینری Perfetto باید به عنوان خروجی یک ردیابی Protobuf بنویسد که مطابق با طرحواره تعریف شده در مستندات Perfetto است.
    • [ 6.1 /H-0-5] * باید حداقل از طریق باینری Perfetto ، حداقل منابع داده شرح داده شده در مستندات Perfetto را فراهم کند.
    • [ 6.1 /H-0-6] * Daemon Treced Perfetto باید به طور پیش فرض فعال شود (خاصیت سیستم persist.traced.enable ).

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2.2.7. کلاس عملکرد رسانه ای دستی

برای تعریف کلاس عملکرد رسانه به بخش 7.11 مراجعه کنید.

2.2.7.1. رسانه ها

در صورت اجرای دستگاه دستی ، android.os.Build.VERSION_CODES.U برای android.os.Build.VERSION_CODES.MEDIA_PERFORMANCE_CLASS برگردانید ، آنها:

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در صورت اجرای دستگاه دستی ، android.os.Build.VERSION_CODES.V برای android.os.Build.VERSION_CODES.MEDIA_PERFORMANCE_CLASS برگردانید ، آنها:

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  • [5.1/H-1-1] باید حداکثر تعداد جلسات رمزگشایی ویدیویی سخت افزاری را VideoCapabilities.getSupportedPerformancePoints() می تواند همزمان در هر ترکیب کدک از طریق CodecCapabilities.getMaxSupportedInstances() انجام شود ، تبلیغ کنید.

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  • [5.1/H-1-2] باید از 6 نمونه از جلسات رمزگشایی ویدیوی سخت افزاری 8 بیتی (SDR) (AVC ، HEVC ، VP9 ، AV1 یا بعد) پشتیبانی کند. FPS و 3 جلسه با وضوح 4K@30fps ، مگر اینکه AV1. برای همه جلسات ، نباید بیش از 1 قاب در ثانیه کاهش یابد. کدک های AV1 فقط برای پشتیبانی از وضوح 1080p مورد نیاز هستند ، اما هنوز هم برای پشتیبانی از 6 نمونه در 1080p30fps لازم است.

پایان الزامات جدید

  • [5.1/H-1-3] باید حداکثر تعداد جلسات رمزگذار ویدیویی سخت افزاری را VideoCapabilities.getSupportedPerformancePoints() می تواند همزمان در هر ترکیب کدک از طریق CodecCapabilities.getMaxSupportedInstances() انجام شود ، تبلیغ کنید.

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  • [5.1/H-1-4] باید از 6 نمونه از جلسات رمزگذار ویدیوی سخت افزاری 8 بیتی (SDR) (AVC ، HEVC ، VP9 ، AV1 یا بعد از آن) پشتیبانی کند. FPS و 2 جلسه در وضوح 4K@30fps ، مگر اینکه AV1. برای همه جلسات ، نباید بیش از 1 قاب در ثانیه کاهش یابد. کدک های AV1 فقط برای پشتیبانی از وضوح 1080p مورد نیاز هستند ، اما هنوز هم برای پشتیبانی از 6 نمونه در 1080p30fps لازم است.

پایان الزامات جدید

  • [5.1/H-1-5] باید حداکثر تعداد رمزگذار ویدیوی سخت افزاری و جلسات رمزگشایی را VideoCapabilities.getSupportedPerformancePoints() می تواند همزمان در هر ترکیب کدک از طریق CodecCapabilities.getMaxSupportedInstances() انجام شود ، تبلیغ کنید.

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  • [5.1/H-1-6] باید از 6 نمونه از برنامه های رمزگذار ویدیوی سخت افزاری 8 بیتی (SDR) و جلسات رمزگذار ویدیویی سخت افزار (AVC ، HEVC ، VP9 ، AV1 یا بعد از آن) پشتیبانی کند. وضوح 4K@30fps (مگر اینکه AV1) ، که حداکثر 2 آن 2 جلسه رمزگذار و 3 جلسه با وضوح 1080p است. برای همه جلسات ، نباید بیش از 1 قاب در ثانیه کاهش یابد. کدک های AV1 فقط برای پشتیبانی از وضوح 1080p مورد نیاز هستند ، اما هنوز هم برای پشتیبانی از 6 نمونه در 1080p30fps لازم است.

پایان الزامات جدید

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  • [5.1/H-1-19] باید از 3 نمونه از 10 بیتی (HDR) رمزگشایی ویدیوی سخت افزاری و جلسات رمزگذار ویدیویی سخت افزاری (AVC ، HEVC ، VP9 ، AV1 یا بعد) پشتیبانی کند. وضوح (مگر اینکه AV1) که حداکثر 1 آن یک جلسه رمزگذار است ، که می تواند در قالب ورودی RGBA_1010102 از طریق سطح GL پیکربندی شود. برای همه جلسات ، نباید بیش از 1 قاب در ثانیه کاهش یابد. در صورت رمزگذاری از سطح GL ، تولید ابرداده HDR توسط رمزگذار لازم نیست. جلسات کدک AV1 فقط برای پشتیبانی از وضوح 1080p حتی در صورت نیاز به این نیاز 4K مورد نیاز است.

پایان الزامات جدید

  • [5.1/H-1-7] باید برای یک جلسه رمزگذاری ویدیویی 1080p یا کوچکتر برای همه رمزگذارهای ویدیویی سخت افزاری در هنگام بارگذاری ، تأخیر اولیه کدک یا کمتر داشته باشد. بار در اینجا به عنوان یک جلسه رمزگذاری ویدیویی فقط 1080p تا 720p با استفاده از کدک های ویدیویی سخت افزاری به همراه اولیه ضبط ضبط صوتی 1080p تعریف شده است. برای کدک Dolby Vision ، تأخیر اولیه سازی کدک باید 50 میلی ثانیه یا کمتر باشد.
  • [5.1/H-1-8] باید برای یک جلسه رمزگذاری صوتی 128 کیلوبیت در ثانیه یا کمتر از جلسه رمزگذاری صوتی BITRATE برای همه رمزگذارهای صوتی در هنگام بار ، یک تأخیر اولیه کدک داشته باشد. بار در اینجا به عنوان یک جلسه رمزگذاری ویدیویی فقط 1080p تا 720p با استفاده از کدک های ویدیویی سخت افزاری به همراه اولیه ضبط ضبط صوتی 1080p تعریف شده است.

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  • [5.1/H-1-9] باید از 2 نمونه از جلسات رمزگشایی ویدیوی سخت افزاری ایمن (AVC ، HEVC ، VP9 ، AV1 یا بعد از آن) در هر ترکیب کدک که به طور همزمان در وضوح 4K@30 فریم در ثانیه (مگر اینکه AV1) برای هر دو 8 باشد ، پشتیبانی کند. -Bit (SDR) و محتوای HDR 10 بیتی. برای همه جلسات ، نباید بیش از 1 قاب در ثانیه کاهش یابد. جلسات کدک AV1 فقط برای پشتیبانی از وضوح 1080p حتی در صورت نیاز به این نیاز 4K مورد نیاز است.

پایان الزامات جدید

شروع نیازهای جدید برای اندروید 15

  • [5.1/H-1-10] باید از 3 نمونه از جلسات رمزگشایی ویدیوی سخت افزاری غیر ایمن به همراه 1 نمونه جلسه رمزگشایی ویدیوی سخت افزاری ایمن (4 مورد در کل) (AVC ، HEVC ، VP9 ، AV1 یا بعد) پشتیبانی کند. ترکیب کدک همزمان با 3 جلسه با وضوح 4K@30fps (مگر اینکه AV1) که شامل یک جلسه رمزگذار ایمن و 1 جلسه NN-Secure در وضوح 1080p@30fps است که حداکثر 2 جلسه می تواند در HDR 10 بیتی باشد. برای همه جلسات ، نباید بیش از 1 قاب در ثانیه کاهش یابد. جلسات کدک AV1 فقط برای پشتیبانی از وضوح 1080p حتی در صورت نیاز به این نیاز 4K مورد نیاز است.

پایان الزامات جدید

  • [5.1/H-1-11] باید از رمزگشایی ایمن برای هر رمزگذار سخت افزاری AVC ، HEVC ، VP9 یا AV1 در دستگاه پشتیبانی کند.
  • [5.1/H-1-12] باید برای یک جلسه رمزگشایی ویدیویی 1080p یا کوچکتر برای همه رمزگشاهای ویدیویی سخت افزاری در زمان بارگذاری ، یک تأخیر اولیه کدک 40 میلی ثانیه یا کمتر داشته باشد. بار در اینجا به عنوان یک جلسه رمزگذاری ویدیویی فقط 1080p تا 720p با استفاده از کدک های ویدیویی سخت افزاری به همراه اولیه سازی پخش صوتی و تصویری 1080p تعریف شده است. برای کدک Dolby Vision ، تأخیر اولیه سازی کدک باید 50 میلی ثانیه یا کمتر باشد.
  • [5.1/H-1-13] باید برای یک جلسه رمزگشایی صوتی 128 کیلوبیت در ثانیه یا پایین تر برای همه رمزگشایی های صوتی در هنگام بار ، یک تأخیر اولیه کدک 30 میلی ثانیه یا کمتر داشته باشد. بار در اینجا به عنوان یک جلسه رمزگذاری ویدیویی فقط 1080p تا 720p با استفاده از کدک های ویدیویی سخت افزاری به همراه اولیه سازی پخش صوتی و تصویری 1080p تعریف شده است.

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  • [5.1/H-1-14] باید از Decoder سخت افزار AV1 10 ، سطح 4.1 و دانه فیلم با اثر دانه فیلم بر روی ترکیب GPU پشتیبانی کند.

پایان الزامات جدید

  • [5.1/H-1-15] باید حداقل 1 رمزگشایی ویدیویی سخت افزاری را که از 4K60 پشتیبانی می کند ، داشته باشد.
  • [5.1/H-1-16] باید حداقل 1 رمزگذار ویدیویی سخت افزاری را که از 4K60 پشتیبانی می کند ، داشته باشد.

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  • [5.1/H-1-21] باید FEATURE_DynamicColorAspect برای همه رمزگشاهای ویدیویی سخت افزاری (AVC ، HEVC ، VP9 ، AV1 یا بعد) پشتیبانی کند. توجه: این بدان معنی است که برنامه ها می توانند جنبه های رنگ محتوای ویدیویی را در طول جلسه رمزگشایی به روز کنند. رمزگشایی هایی که از محتوای 10 بیتی و 8 بیتی پشتیبانی می کنند ، باید از تعویض پویا بین محتوای 8- و 10 بیتی در حالت سطح پشتیبانی کنند. رمزگشایی هایی که از عملکرد انتقال HDR پشتیبانی می کنند باید از تعویض پویا بین SDR و محتوای HDR پشتیبانی کنند.

پایان الزامات جدید

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  • [5.1/H-1-22] باید از رمزگذاری ، رمزگشایی ، ویرایش GPU و نمایش محتوای ویدیویی در نسبت ابعاد پرتره صرف نظر از ابرداده چرخش برای بزرگترین وضوح دوربین پشتیبانی شده یا 4K هر کدام کمتر پشتیبانی کند. توجه: اگر کدک از HDR پشتیبانی کند ، این شامل پروفایل HDR است. کدک های AV1 فقط برای پشتیبانی از وضوح 1080p مورد نیاز هستند. این نیاز فقط برای کدک های سخت افزاری ، GPU و DPU است.

پایان الزامات جدید

  • [5.3/H-1-1] برای یک جلسه ویدیویی 4K 60 فریم در ثانیه تحت بار نباید بیش از 1 فریم را در 10 ثانیه کاهش دهد.
  • [5.3/H-1-2] نباید در طی یک وضوح تصویری در یک جلسه ویدیویی 60 فریمز تحت بار برای یک جلسه 4K ، بیش از 1 قاب در 10 ثانیه کاهش یابد.
  • [5.6/H-1-1] باید با استفاده از تست TAP-TONE CTS ، از 80 میلی ثانیه یا کمتر از 80 میلی ثانیه یا کمتر برخوردار باشد.
  • [5.6/H-1-2] باید حداقل یک مسیر داده پشتیبانی شده از 80 میلی ثانیه یا کمتر از یک مسیر صوتی دور باشد.
  • [5.6/H-1-3] باید از> = 24 بیتی صوتی برای خروجی استریو بیش از 3.5 میلی متر جک های صوتی در صورت وجود و بیش از صدای USB پشتیبانی کند ، در صورت پشتیبانی از کل مسیر داده برای تأخیر کم و تنظیمات جریان. برای پیکربندی تأخیر کم ، AUADIO باید توسط برنامه در حالت پاسخ به تماس کم تأخیر استفاده شود. برای پیکربندی جریان ، باید از Audiotrack Java توسط برنامه استفاده شود. در هر دو تنظیمات تأخیر کم و جریان ، سینک خروجی HAL باید AUDIO_FORMAT_PCM_24_BIT ، AUDIO_FORMAT_PCM_24_BIT_PACKED ، AUDIO_FORMAT_PCM_32_BIT یا AUDIO_FORMAT_PCM_FLOAT برای قالب خروجی هدف خود بپذیرد.

شروع نیازهای جدید برای اندروید 15

  • [5.6/H-1-4] باید از> = 4 دستگاه صوتی USB کانال پشتیبانی کند. (این توسط کنترل کننده های DJ برای پیش نمایش آهنگ استفاده می شود.)

پایان الزامات جدید

  • [5.6/H-1-5] باید از دستگاه های MIDI سازگار با کلاس پشتیبانی کند و پرچم ویژگی MIDI را اعلام کند.
  • [5.6/H-1-9] باید حداقل 12 کانال مخلوط کند. این به معنای توانایی باز کردن یک صوتی با ماسک کانال 7.1.4 و به درستی مکانی یا پایین آمدن همه کانال ها به استریو است.
  • [5.6/H-SR] به شدت توصیه می شود که از 24 کانال مخلوط با حداقل پشتیبانی از ماسک های 9.1.6 و 22.2 کانال پشتیبانی کنید.
  • [5.7/H-1-2] باید با قابلیت رمزگشایی محتوای زیر از MediaDrm.SECURITY_LEVEL_HW_SECURE_ALL پشتیبانی کند.
حداقل اندازه نمونه 4 MIB
حداقل تعداد زیر نمونه ها - H264 یا HEVC 32
حداقل تعداد زیر نمونه ها - VP9 9
حداقل تعداد زیر نمونه ها - AV1 288
حداقل اندازه بافر نمونه 1 مگابایت
حداقل اندازه بافر رمزنگاری عمومی 500 کیب
حداقل تعداد جلسات همزمان 30
حداقل تعداد کلیدها در هر جلسه 20
حداقل تعداد کلیدها (همه جلسات) 80
حداقل تعداد کل کلیدهای DRM (همه جلسات) 6
اندازه پیام 16 کیلو بایت
فریم های رمزگشایی در هر ثانیه 60 فریم بر ثانیه
  • [5.1/H-1-17] باید حداقل 1 رمزگشایی تصویر سخت افزاری را که از مشخصات پایه AVIF پشتیبانی می کند ، داشته باشد.
  • [5.1/H-1-18] MUST support AV1 encoder which can encode up to 480p resolution at 30fps and 1Mbps.

Start of new requirements for Android 15

  • [5.1/H-1-20] MUST support the Feature_HdrEditing feature for all hardware AV1 and HEVC encoders present on the device at 4K resolution or the largest Camera-supported resolution, whichever is less.

End of new requirements

  • [5.12/H-SR] Are Strongly Recommended to support support the Feature_HdrEditing feature for all hardware AV1 and HEVC encoders present on the device.
  • [5.12/H-1-2] MUST support RGBA_1010102 color format for all hardware AV1 and HEVC encoders present on the device.
  • [5.12/H-1-3] MUST advertise support for the EXT_YUV_target extension to sample from YUV textures in both 8 and 10-bits.
  • [7.1.4/H-1-1] MUST have at least 6 hardware overlays in the Display processing unit (DPU), with at least 2 of them capable of displaying 10-bit video content.

Start of new requirements for Android 15

If Handheld device implementations return android.os.Build.VERSION_CODES.V for android.os.Build.VERSION_CODES.MEDIA_PERFORMANCE_CLASS and they include support for a hardware AVC or HEVC encoder, they:

End of new requirements

2.2.7.2. دوربین

If Handheld device implementations return android.os.Build.VERSION_CODES.U for android.os.Build.VERSION_CODES.MEDIA_PERFORMANCE_CLASS , they:

Start of new requirements for Android 15

If Handheld device implementations return android.os.Build.VERSION_CODES.V for android.os.Build.VERSION_CODES.MEDIA_PERFORMANCE_CLASS , they:

End of new requirements

Start of new requirements for Android 15

  • [ 7.5 /H-1-1] MUST have a primary rear facing camera with a resolution of at least 12 megapixels supporting video capture at 4k@30fps , 1080p@60fps, and 720p@60fps . The primary rear-facing camera is the rear-facing camera with the lowest camera ID.

End of new requirements

  • [ 7.5 /H-1-2] MUST have a primary front facing camera with a resolution of at least 6 megapixels and support video capture at 1080p@30fps. The primary front-facing camera is the front-facing camera with the lowest camera ID.
  • [ 7.5 /H-1-3] MUST support android.info.supportedHardwareLevel property as FULL or better for back primary and LIMITED or better for front primary camera.
  • [ 7.5 /H-1-4] MUST support CameraMetadata.SENSOR_INFO_TIMESTAMP_SOURCE_REALTIME for both primary cameras.
  • [ 7.5 /H-1-5] MUST have camera2 JPEG capture latency < 1000 ms for 1080p resolution as measured by the CTS camera PerformanceTest under ITS lighting conditions (3000K) for both primary cameras.
  • [ 7.5 /H-1-6] MUST have camera2 startup latency (open camera to first preview frame) < 500 ms as measured by the CTS camera PerformanceTest under ITS lighting conditions (3000K) for both primary cameras.
  • [ 7.5 /H-1-8] MUST support CameraMetadata.REQUEST_AVAILABLE_CAPABILITIES_RAW and android.graphics.ImageFormat.RAW_SENSOR for the primary back camera.
  • [ 7.5 /H-1-9] MUST have a rear-facing primary camera supporting 720p or 1080p @ 240fps.
  • [ 7.5 /H-1-10] MUST have min ZOOM_RATIO < 1.0 for the primary cameras if there is an ultrawide RGB camera facing the same direction.
  • [ 7.5 /H-1-11] MUST implement concurrent front-back streaming on primary cameras.
  • [ 7.5 /H-1-12] MUST support CONTROL_VIDEO_STABILIZATION_MODE_PREVIEW_STABILIZATION for both primary front and primary back camera.
  • [ 7.5 /H-1-13] MUST support LOGICAL_MULTI_CAMERA capability for the primary rear-facing camera if there are more than 1 RGB rear-facing cameras.
  • [ 7.5 /H-1-14] MUST support STREAM_USE_CASE capability for both primary front and primary back camera.
  • [ 7.5 /H-1-15] MUST support Night mode extensions via both CameraX and Camera2 extensions for primary cameras.
  • [ 7.5 /H-1-16] MUST support DYNAMIC_RANGE_TEN_BIT capability for the primary cameras.
  • [ 7.5 /H-1-17] MUST support CONTROL_SCENE_MODE_FACE_PRIORITY and face detection ( STATISTICS_FACE_DETECT_MODE_SIMPLE or STATISTICS_FACE_DETECT_MODE_FULL ) for the primary cameras.

Start of new requirements for Android 15

  • [ 7.5 /H-1-18] MUST support JPEG_R for the primary rear and primary front cameras.
  • [ 7.5 /H-1-19] MUST support CONTROL_VIDEO_STABILIZATION_MODE_PREVIEW_STABILIZATION for 1080p HLG10 preview with maximum-size 16:9 aspect ratio JPEG, and for 720p HLG10 preview with maximum-size 16:9 aspect ratio JPEG stream combinations for the primary rear camera.
  • [ 7.5 /H-1-20] MUST by default output JPEG_R for the primary rear and primary front cameras in the native camera app.

End of new requirements

2.2.7.3. سخت افزار

If Handheld device implementations return android.os.Build.VERSION_CODES.U for android.os.Build.VERSION_CODES.MEDIA_PERFORMANCE_CLASS , they:

Start of new requirements for Android 15

If Handheld device implementations return android.os.Build.VERSION_CODES.V for android.os.Build.VERSION_CODES.MEDIA_PERFORMANCE_CLASS , they:

End of new requirements

  • [7.1.1.1/H-2-1] MUST have screen resolution of at least 1080p.

Start of new requirements for Android 15

  • [7.1.1.3/H-2-1] MUST have screen density of at least 400 dpi if the device's screen width is < 600 dp .

End of new requirements

  • [7.1.1.3/H-3-1] MUST have a HDR display supporting at least 1000 nits average.

Start of new requirements for Android 15

End of new requirements

2.2.7.4. عملکرد

If Handheld device implementations return android.os.Build.VERSION_CODES.U for android.os.Build.VERSION_CODES.MEDIA_PERFORMANCE_CLASS , they:

Start of new requirements for Android 15

If Handheld device implementations return android.os.Build.VERSION_CODES.V for android.os.Build.VERSION_CODES.MEDIA_PERFORMANCE_CLASS , they:

End of new requirements

  • [8.2/H-1-1] MUST ensure a sequential write performance of at least 150 MB/s.
  • [8.2/H-1-2] MUST ensure a random write performance of at least 10 MB/s.
  • [8.2/H-1-3] MUST ensure a sequential read performance of at least 250 MB/s.
  • [8.2/H-1-4] MUST ensure a random read performance of at least 100 MB/s.
  • [8.2/H-1-5] MUST ensure a parallel sequential read and write performance with 2x read and 1x write performance of at least 50 MB/s.

Start of new requirements for Android 15

2.2.7.5. گرافیک

If Handheld device implementations return android.os.Build.VERSION_CODES.V for android.os.Build.VERSION_CODES.MEDIA_PERFORMANCE_CLASS , they:

End of new requirements

2.3. Television Requirements

An Android Television device refers to an Android device implementation that is an entertainment interface for consuming digital media, movies, games, apps, and/or live TV for users sitting about ten feet away (a "lean back" or "10-foot user interface").

Android device implementations are classified as a Television if they meet all the following criteria:

  • Have provided a mechanism to remotely control the rendered user interface on the display that might sit ten feet away from the user.
  • Have an embedded screen display with the diagonal length larger than 24 inches OR include a video output port, such as VGA, HDMI, DisplayPort, or a wireless port for display.

The additional requirements in the rest of this section are specific to Android Television device implementations.

2.3.1. سخت افزار

Television device implementations:

  • [ 7.2 .2/T-0-1] MUST support D-pad .
  • [ 7.2 .3/T-0-1] MUST provide the Home and Back functions.
  • [ 7.2 .3/T-0-2] MUST send both the normal and long press event of the Back function ( KEYCODE_BACK ) to the foreground application.
  • [ 7.2 .6.1/T-0-1] MUST include support for game controllers and declare the android.hardware.gamepad feature flag.
  • [ 7.2 .7/T] SHOULD provide a remote control from which users can access non-touch navigation and core navigation keys inputs.

If Television device implementations include a 3-axis gyroscope, they:

  • [ 7.3 .4/T-1-1] MUST be able to report events up to a frequency of at least 100 Hz.
  • [ 7.3 .4/T-1-2] MUST be capable of measuring orientation changes up to 1000 degrees per second.

Television device implementations:

  • [ 7.4 .3/T-0-1] MUST support Bluetooth and Bluetooth LE.
  • [ 7.6 .1/T-0-1] MUST have at least 4 GB of non-volatile storage available for application private data (aka "/data" partition).

If Television device implementations include a USB port that supports host mode, they:

  • [ 7.5 .3/T-1-1] MUST include support for an external camera that connects through this USB port but is not necessarily always connected.

If TV device implementations are 32-bit:

  • [ 7.6 .1/T-1-1] The memory available to the kernel and userspace MUST be at least 896MB if any of the following densities are used:

    • 400dpi or higher on small/normal screens
    • xhdpi or higher on large screens
    • tvdpi or higher on extra large screens

If TV device implementations are 64-bit:

  • [ 7.6 .1/T-2-1] The memory available to the kernel and userspace MUST be at least 1280MB if any of the following densities are used:

    • 400dpi or higher on small/normal screens
    • xhdpi or higher on large screens
    • tvdpi or higher on extra large screens

Note that the "memory available to the kernel and userspace" above refers to the memory space provided in addition to any memory already dedicated to hardware components such as radio, video, and so on that are not under the kernel's control on device implementations.

Television device implementations:

  • [ 7.8 .1/T] SHOULD include a microphone.
  • [ 7.8 .2/T-0-1] MUST have an audio output and declare android.hardware.audio.output .

2.3.2. چند رسانه ای

Television device implementations MUST support the following audio encoding and decoding formats and make them available to third-party applications:

  • [ 5.1 /T-0-1] MPEG-4 AAC Profile (AAC LC)
  • [ 5.1 /T-0-2] MPEG-4 HE AAC Profile (AAC+)
  • [ 5.1 /T-0-3] AAC ELD (enhanced low delay AAC)

Television device implementations MUST support the following video encoding formats and make them available to third-party applications:

  • [ 5.2 /T-0-1] H.264
  • [ 5.2 /T-0-2] VP8
  • [ 5.2 /T-0-3] AV1

Television device implementations:

  • [ 5.2 .2/T-SR-1] Are STRONGLY RECOMMENDED to support H.264 encoding of 720p and 1080p resolution videos at 30 frames per second.

Television device implementations MUST support the following video decoding formats and make them available to third-party applications:

Television device implementations MUST support MPEG-2 decoding, as detailed in Section 5.3.1, at standard video frame rates and resolutions up to and including:

  • [ 5.3.1 /T-1-1] HD 1080p at 29.97 frames per second with Main Profile High Level.
  • [ 5.3.1 /T-1-2] HD 1080i at 59.94 frames per second with Main Profile High Level. They MUST deinterlace interlaced MPEG-2 video and make it available to third-party applications.

Television device implementations MUST support H.264 decoding, as detailed in Section 5.3.4, at standard video frame rates and resolutions up to and including:

  • [ 5.3.4 /T-1-1] HD 1080p at 60 frames per second with Baseline Profile
  • [ 5.3.4 /T-1-2] HD 1080p at 60 frames per second with Main Profile
  • [ 5.3.4 /T-1-3] HD 1080p at 60 frames per second with High Profile Level 4.2

Television device implementations with H.265 hardware decoders MUST support H.265 decoding, as detailed in Section 5.3.5, at standard video frame rates and resolutions up to and including:

  • [ 5.3.5 /T-1-1] HD 1080p at 60 frames per second with Main Profile Level 4.1

If Television device implementations with H.265 hardware decoders support H.265 decoding and the UHD decoding profile, they:

  • [ 5.3.5 /T-2-1] MUST support the UHD decoding profile at 60 frames per second with Main10 Level 5 Main Tier profile

Television device implementations MUST support VP8 decoding, as detailed in Section 5.3.6, at standard video frame rates and resolutions up to and including:

  • [ 5.3.6 /T-1-1] HD 1080p at 60 frames per second decoding profile

Television device implementations with VP9 hardware decoders MUST support VP9 decoding, as detailed in Section 5.3.7, at standard video frame rates and resolutions up to and including:

  • [ 5.3.7 /T-1-1] HD 1080p at 60 frames per second with profile 0 (8 bit color depth)

If Television device implementations with VP9 hardware decoders support VP9 decoding and the UHD decoding profile, they:

  • [ 5.3.7 /T-2-1] MUST support the UHD decoding profile at 60 frames per second with profile 0 (8 bit color depth).
  • [ 5.3.7 /T-SR1] Are STRONGLY RECOMMENDED to support the UHD decoding profile at 60 frames per second with profile 2 (10 bit color depth).

Television device implementations:

  • [ 5.5 /T-0-1] MUST include support for system Master Volume and digital audio output volume attenuation on supported outputs, except for compressed audio passthrough output (where no audio decoding is done on the device).

If Television device implementations do not have a built in display, but instead support an external display connected via HDMI, they:

  • [ 5.8 /T-0-1] MUST set the HDMI output mode to the highest resolution for the chosen pixel format that works with 50Hz or 60Hz refresh rate for the external display, depending on the video refresh rate for the region the device is sold در
  • [ 5.8 /T-SR-1] Are STRONGLY RECOMMENDED to provide a user configurable HDMI refresh rate selector.
  • [ 5.8 ] SHOULD set the HDMI output mode refresh rate to either 50Hz or 60Hz, depending on the video refresh rate for the region the device is sold in.

If Television device implementations do not have a built in display, but instead support an external display connected via HDMI, they:

  • [ 5.8 /T-1-1] MUST support HDCP 2.2.

If Television device implementations do not support UHD decoding, but instead support an external display connected via HDMI, they:

  • [ 5.8 /T-2-1] MUST support HDCP 1.4

2.3.3. نرم افزار

Television device implementations:

  • [ 3 /T-0-1] MUST declare the features android.software.leanback and android.hardware.type.television .
  • [ 3.2.3.1 /T-0-1] MUST preload one or more applications or service components with an intent handler, for all the public intent filter patterns defined by the following application intents listed here .
  • [ 3.4 .1/T-0-1] MUST provide a complete implementation of the android.webkit.Webview API.

If Android Television device implementations support a lock screen,they:

  • [ 3.8 .10/T-1-1] MUST display the Lock screen Notifications including the Media Notification Template.

Television device implementations:

  • [ 3.8 .14/T-SR-1] Are STRONGLY RECOMMENDED to support picture-in-picture (PIP) mode multi-window.
  • [ 3.10 /T-0-1] MUST support third-party accessibility services.
  • [ 3.10 /T-SR-1] Are STRONGLY RECOMMENDED to preload accessibility services on the device comparable with or exceeding functionality of the Switch Access and TalkBack (for languages supported by the preinstalled Text-to-speech engine) accessibility services as provided in the talkback open source project .

If Television device implementations report the feature android.hardware.audio.output , they:

  • [ 3.11 /T-SR-1] Are STRONGLY RECOMMENDED to include a TTS engine supporting the languages available on the device.
  • [ 3.11 /T-1-1] MUST support installation of third-party TTS engines.

Start of new requirements for Android 15

Television device implementations:

  • [ 3.12 /T-0-1] MUST support TV Input Framework.

End of new requirements

Start of new requirements for Android 15

The Android Television Input Framework (TIF) simplifies the delivery of live content to Android Television devices. TIF provides a standard API to create input modules that control Android Television devices.

Television device implementations:

  • [ 3 /T-0-2] MUST declare the platform feature android.software.live_tv .
  • [ 3 /T-0-3] MUST support all TIF APIs such that an application which uses these APIs and the third-party TIF-based inputs service can be installed and used on the device.

The Android Television Tuner Framework (TF) unifies the handling of live content from Tuner with streaming content from IP on Android Television devices. The Tuner Framework provides a standard API to create input services that use Android Television Tuner.

If device implementations support Tuner, they:

  • [ 3 /T-1-1] MUST support all Tuner Framework APIs such that an application which uses these APIs can be installed and used on the device.

End of new requirements

2.3.4. Performance and Power

  • [ 8.1 /T-0-1] Consistent frame latency . Inconsistent frame latency or a delay to render frames MUST NOT happen more often than 5 frames in a second, and SHOULD be below 1 frames in a second.
  • [ 8.2 /T-0-1] MUST ensure a sequential write performance of at least 5MB/s.
  • [ 8.2 /T-0-2] MUST ensure a random write performance of at least 0.5MB/s.
  • [ 8.2 /T-0-3] MUST ensure a sequential read performance of at least 15MB/s.
  • [ 8.2 /T-0-4] MUST ensure a random read performance of at least 3.5MB/s.

If Television device implementations include features to improve device power management that are included in AOSP or extend the features that are included in AOSP, they:

  • [ 8.3 /T-1-1] MUST provide user affordance to enable and disable the battery saver feature.

If Television device implementations do not have a battery they:

If Television device implementations have a battery they:

  • [ 8.3 /T-1-3] MUST provide user affordance to display all apps that are exempted from App Standby and Doze power-saving modes.

Television device implementations:

  • [ 8.4 /T-0-1] MUST provide a per-component power profile that defines the current consumption value for each hardware component and the approximate battery drain caused by the components over time as documented in the Android Open Source Project site.
  • [ 8.4 /T-0-2] MUST report all power consumption values in milliampere hours (mAh).
  • [ 8.4 /T-0-3] MUST report CPU power consumption per each process's UID. The Android Open Source Project meets the requirement through the uid_cputime kernel module implementation.
  • [ 8.4 /T] SHOULD be attributed to the hardware component itself if unable to attribute hardware component power usage to an application.
  • [ 8.4 /T-0-4] MUST make this power usage available via the adb shell dumpsys batterystats shell command to the app developer.

2.3.5. Security Model

Television device implementations:

  • [9/T-0-1] MUST declare the android.hardware.security.model.compatible feature.
  • [ 9.11 /T-0-1] MUST back up the keystore implementation with an isolated execution environment.
  • [ 9.11 /T-0-2] MUST have implementations of RSA, AES, ECDSA and HMAC cryptographic algorithms and MD5, SHA-1, and SHA-2 family hash functions to properly support the Android Keystore system's supported algorithms in an area that is securely isolated from the code running on the kernel and above. Secure isolation MUST block all potential mechanisms by which kernel or userspace code might access the internal state of the isolated environment, including DMA. The upstream Android Open Source Project (AOSP) meets this requirement by using the Trusty implementation, but another ARM TrustZone-based solution or a third-party reviewed secure implementation of a proper hypervisor-based isolation are alternative options.
  • [ 9.11 /T-0-3] MUST perform the lock screen authentication in the isolated execution environment and only when successful, allow the authentication-bound keys to be used. Lock screen credentials MUST be stored in a way that allows only the isolated execution environment to perform lock screen authentication. The upstream Android Open Source Project provides the Gatekeeper Hardware Abstraction Layer (HAL) and Trusty, which can be used to satisfy this requirement.

Start of new requirements for Android 15

  • [ 9.11 /T-0-4] MUST support key attestation where the attestation signing key is protected by secure hardware and signing is performed in secure hardware. The attestation signing keys MUST be shared across large enough number of devices to prevent the keys prevented from being used as permanent device identifiers. One way of meeting this requirement is to share the same attestation key unless at least 100,000 units of a given SKU are produced. If more than 100,000 units of an SKU are produced, a different key MAY be used for each 100,000 units.

End of new requirements

Note that if a device implementation is already launched on an earlier Android version, such a device is exempted from the requirement to have a keystore backed by an isolated execution environment and support the key attestation, unless it declares the android.hardware.fingerprint feature which requires a keystore backed by an isolated execution environment.

If Television device implementations support a secure lock screen, they:

  • [ 9.11 /T-1-1] MUST allow the user to choose the Sleep timeout for transition from the unlocked to the locked state, with a minimum allowable timeout up to 15 seconds or less.

If Television device implementations include multiple users and do not declare the android.hardware.telephony feature flag, they:

  • [ 9.5 /T-2-1] MUST support restricted profiles, a feature that allows device owners to manage additional users and their capabilities on the device. With restricted profiles, device owners can quickly set up separate environments for additional users to work in, with the ability to manage finer-grained restrictions in the apps that are available in those environments.

If Television device implementations include multiple users and declare the android.hardware.telephony feature flag, they:

  • [ 9.5 /T-3-1] MUST NOT support restricted profiles but MUST align with the AOSP implementation of controls to enable /disable other users from accessing the voice calls and SMS.

If Television device implementations declare android.hardware.microphone , they:

  • [ 9.8.2 /T-4-1] MUST display the microphone indicator when an app is accessing audio data from the microphone, but not when the microphone is only accessed by HotwordDetectionService, SOURCE_HOTWORD, ContentCaptureService, or apps holding the roles called out in Section 9.1 Permissions with CDD identifier C-3-X.
  • [ 9.8.2 /T-4-2] MUST not hide the microphone indicator for system apps that have visible user interfaces or direct user interaction.

If Television device implementations declare android.hardware.camera.any , they:

  • [ 9.8.2 /T-5-1] MUST display the camera indicator when an app is accessing live camera data, but not when the camera is only being accessed by app(s) holding the roles called out in Section 9.1 Permissions with CDD identifier [C-3-X].
  • [ 9.8.2 /T-5-2] MUST not hide the camera indicator for system apps that have visible user interfaces or direct user interaction.

2.3.6. Developer Tools and Options Compatibility

Start of new requirements for Android 15

Television device implementations:

  • پرفتو
    • [ 6.1 /T-0-1] MUST expose a /system/bin/perfetto binary to the shell user which cmdline complies with the perfetto documentation .
    • [ 6.1 /T-0-2] The perfetto binary MUST accept as input a protobuf config that complies with the schema defined in the perfetto documentation .
    • [ 6.1 /T-0-3] The perfetto binary MUST write as output a protobuf trace that complies with the schema defined in the perfetto documentation .
    • [ 6.1 /T-0-4] MUST provide, through the perfetto binary, at least the data sources described in the perfetto documentation .
    • [ 6.1 /T-0-5] The perfetto traced daemon MUST be enabled by default (system property persist.traced.enable ).

End of new requirements

2.4. Watch Requirements

An Android Watch device refers to an Android device implementation intended to be worn on the body, perhaps on the wrist.

Android device implementations are classified as a Watch if they meet all the following criteria:

  • Have a screen with the physical diagonal length in the range from 1.1 to 2.5 inches.
  • Have a mechanism provided to be worn on the body.

The additional requirements in the rest of this section are specific to Android Watch device implementations.

2.4.1. سخت افزار

Watch device implementations:

  • [ 7.1 .1.1/W-0-1] MUST have a screen with the physical diagonal size in the range from 1.1 to 2.5 inches.

  • [ 7.2 .3/W-0-1] MUST have the Home function available to the user, and the Back function except for when it is in UI_MODE_TYPE_WATCH .

  • [ 7.2 .4/W-0-1] MUST support touchscreen input.

  • [ 7.3 .1/W-SR-1] Are STRONGLY RECOMMENDED to include a 3-axis accelerometer.

If Watch device implementations include a GPS/GNSS receiver and report the capability to applications through the android.hardware.location.gps feature flag, they:

  • [ 7.3 .3/W-1-1] MUST report GNSS measurements, as soon as they are found, even if a location calculated from GPS/GNSS is not yet reported.
  • [ 7.3 .3/W-1-2] MUST report GNSS pseudoranges and pseudorange rates, that, in open-sky conditions after determining the location, while stationary or moving with less than 0.2 meter per second squared of acceleration, are sufficient to calculate position within 20 meters, and speed within 0.2 meters per second, at least 95% of the time.

If Watch device implementations include a 3-axis gyroscope, they:

  • [ 7.3 .4/W-2-1] MUST be capable of measuring orientation changes up to 1000 degrees per second.

Watch device implementations:

  • [ 7.4 .3/W-0-1] MUST support Bluetooth.

  • [ 7.6 .1/W-0-1] MUST have at least 1 GB of non-volatile storage available for application private data (aka "/data" partition).

  • [ 7.6 .1/W-0-2] MUST have at least 416 MB memory available to the kernel and userspace.

  • [ 7.8 .1/W-0-1] MUST include a microphone.

  • [ 7.8 .2/W] MAY have audio output.

2.4.2. چند رسانه ای

No additional requirements.

2.4.3. نرم افزار

Watch device implementations:

  • [ 3 /W-0-1] MUST declare the feature android.hardware.type.watch .
  • [ 3 /W-0-2] MUST support uiMode = UI_MODE_TYPE_WATCH .
  • [ 3.2.3.1 /W-0-1] MUST preload one or more applications or service components with an intent handler, for all the public intent filter patterns defined by the following application intents listed here .

Watch device implementations:

  • [ 3.8 .4/W-SR-1] Are STRONGLY RECOMMENDED to implement an assistant on the device to handle the Assist action .

Watch device implementations that declare the android.hardware.audio.output feature flag:

  • [ 3.10 /W-1-1] MUST support third-party accessibility services.
  • [ 3.10 /W-SR-1] Are STRONGLY RECOMMENDED to preload accessibility services on the device comparable with or exceeding functionality of the Switch Access and TalkBack (for languages supported by the preinstalled Text-to-speech engine) accessibility services as provided in the talkback open source project .

If Watch device implementations report the feature android.hardware.audio.output, they:

  • [ 3.11 /W-SR-1] Are STRONGLY RECOMMENDED to include a TTS engine supporting the languages available on the device.

  • [ 3.11 /W-0-1] MUST support installation of third-party TTS engines.

2.4.4. Performance and Power

If Watch device implementations include features to improve device power management that are included in AOSP or extend the features that are included in AOSP, they:

  • [ 8.3 /W-SR-1] Are STRONGLY RECOMMENDED to provide user affordance to display all apps that are exempted from App Standby and Doze power-saving modes.
  • [ 8.3 /W-SR-2] Are STRONGLY RECOMMENDED to provide user affordance to enable and disable the battery saver feature.

Watch device implementations:

  • [ 8.4 /W-0-1] MUST provide a per-component power profile that defines the current consumption value for each hardware component and the approximate battery drain caused by the components over time as documented in the Android Open Source Project site.
  • [ 8.4 /W-0-2] MUST report all power consumption values in milliampere hours (mAh).
  • [ 8.4 /W-0-3] MUST report CPU power consumption per each process's UID. The Android Open Source Project meets the requirement through the uid_cputime kernel module implementation.
  • [ 8.4 /W-0-4] MUST make this power usage available via the adb shell dumpsys batterystats shell command to the app developer.
  • [ 8.4 /W] SHOULD be attributed to the hardware component itself if unable to attribute hardware component power usage to an application.

2.4.5. Security Model

Watch device implementations:

  • [9/W-0-1] MUST declare the android.hardware.security.model.compatible feature.

If Watch device implementations include multiple users and do not declare the android.hardware.telephony feature flag, they:

  • [ 9.5 /W-1-1] MUST support restricted profiles, a feature that allows device owners to manage additional users and their capabilities on the device. With restricted profiles, device owners can quickly set up separate environments for additional users to work in, with the ability to manage finer-grained restrictions in the apps that are available in those environments.

If Watch device implementations include multiple users and declare the android.hardware.telephony feature flag, they:

  • [ 9.5 /W-2-1] MUST NOT support restricted profiles but MUST align with the AOSP implementation of controls to enable /disable other users from accessing the voice calls and SMS.

If device implementations have a secure lock screen and include one or more trust agent, which implements the TrustAgentService System API, they:

  • [ 9.11.1 /W-1-1] MUST challenge the user for one of the recommended primary authentication methods (eg: PIN, pattern, password) more frequently than once every 72 hours.

2.5. Automotive Requirements

Android Automotive implementation refers to a vehicle head unit running Android as an operating system for part or all of the system and/or infotainment functionality.

Android device implementations are classified as an Automotive if they declare the feature android.hardware.type.automotive or meet all the following criteria.

  • Are embedded as part of, or pluggable to, an automotive vehicle.
  • Are using a screen in the driver's seat row as the primary display.

The additional requirements in the rest of this section are specific to Android Automotive device implementations.

2.5.1. سخت افزار

Automotive device implementations:

  • [ 7.1 .1.1/A-0-1] MUST have a screen at least 6 inches in physical diagonal size.
  • [ 7.1 .1.1/A-0-2] MUST have a screen size layout of at least 750 dp x 480 dp.

Start of new requirements for Android 15

If Automotive device implementations support Concurrent Multi-user (where multiple Android users can interact with the device concurrently, each using their own display when config_multiuserVisibleBackgroundUsers is enabled), they:

  • [ 7.1 .1.1/A-1-1] MUST have a separate screen of at least 6 inches in physical diagonal size for each occupant zone for the main display. This should be tagged as CarOccupantZoneManager.DISPLAY_TYPE_MAIN for each occupant zone.
  • [ 7.1 .1.1/A-1-2] MUST have a screen size layout of at least 750 dp x 480 dp for each main display.

End of new requirements

If Automotive device implementations support OpenGL ES 3.1, they:

  • [ 7.1 .4.1/A-0-1] MUST declare OpenGL ES 3.1 or higher.
  • [ 7.1 .4.1/A-0-2] MUST support Vulkan 1.1.
  • [ 7.1 .4.1/A-0-3] MUST include Vulkan loader and export all symbols.

Automotive device implementations:

Start of new requirements for Android 15

End of new requirements

Start of new requirements for Android 15

  • [ 7.2 .3/A-0-1] MUST provide the Home and Back functions, and MAY provide Back and Recent function s .

End of new requirements

Start of new requirements for Android 15

If Automotive device implementations support Concurrent Multi-user (where multiple Android users can interact with the device concurrently, each using their own display when config_multiuserVisibleBackgroundUsers is enabled), they:

  • [ 7.3 /A-1-1] MUST set the NIGHT_MODE flag value consistently with the dashboard day/night mode across all displays, including the rear seat displays.

End of new requirements

If Automotive device implementations include an accelerometer, they:

  • [ 7.3 .1/A-1-1] MUST be able to report events up to a frequency of at least 100 Hz.

If device implementations include a 3-axis accelerometer, they:

  • [ 7.3 .1/A-SR-1] Are STRONGLY RECOMMENDED to implement the composite sensor for limited axes accelerometer.

If Automotive device implementations include an accelerometer with less than 3 axes, they:

  • [ 7.3 .1/A-1-3] MUST implement and report TYPE_ACCELEROMETER_LIMITED_AXES sensor.
  • [ 7.3 .1/A-1-4] MUST implement and report TYPE_ACCELEROMETER_LIMITED_AXES_UNCALIBRATED sensor.

If Automotive device implementations include a gyroscope, they:

  • [ 7.3 .4/A-2-1] MUST be able to report events up to a frequency of at least 100 Hz.
  • [ 7.3 .4/A-2-3] MUST be capable of measuring orientation changes up to 250 degrees per second.
  • [ 7.3 .4/A-SR-1] Are STRONGLY RECOMMENDED to configure the gyroscope's measurement range to +/-250dps in order to maximize the resolution possible.

If Automotive device implementations include a 3-axis gyroscope, they:

  • [ 7.3 .4/A-SR-2] Are STRONGLY RECOMMENDED to implement the composite sensor for limited axes gyroscope.

If Automotive device implementations include a gyroscope with less than 3-axes, they:

  • [ 7.3 .4/A-4-1] MUST implement and report TYPE_GYROSCOPE_LIMITED_AXES sensor.
  • [ 7.3 .4/A-4-2] MUST implement and report TYPE_GYROSCOPE_LIMITED_AXES_UNCALIBRATED sensor.

If Automotive device implementations include a GPS/GNSS receiver, but do not include cellular network-based data connectivity, they:

  • [ 7.3 .3/A-3-1] MUST determine location the very first time the GPS/GNSS receiver is turned on or after 4+ days within 60 seconds.
  • [ 7.3 .3/A-3-2] MUST meet the time-to-first-fix criteria as described in 7.3.3/C-1-2 and 7.3.3/C-1-6 for all other location requests (ie requests which are not the first time ever or after 4+ days). The requirement 7.3.3/C-1-2 is typically met in vehicles without cellular network-based data connectivity, by using GNSS orbit predictions calculated on the receiver, or using the last known vehicle location along with the ability to dead reckon for at least 60 seconds with a position accuracy satisfying 7.3.3/C-1-3 , or a combination of both.

If automotive device implementations include a TYPE_HEADING sensor, they:

  • [ 7.3 .4/A-4-3] MUST be able to report events up to a frequency of at least 1 Hz.
  • [ 7.3 .4/A-SR-3] STRONGLY_RECOMMENDED to report events up to a frequency of at least 10 Hz.
  • SHOULD be in reference to true north.
  • SHOULD be available even when the vehicle is still.
  • SHOULD have a resolution of at least 1 degree.

Automotive device implementations:

  • [ 7.4 .3/A-0-1] MUST support Bluetooth and SHOULD support Bluetooth LE.
  • [ 7.4 .3/A-0-2] Android Automotive implementations MUST support the following Bluetooth profiles:
    • Phone calling over Hands-Free Profile (HFP).
    • Media playback over Audio Distribution Profile (A2DP).
    • Media playback control over Remote Control Profile (AVRCP).
    • Contact sharing using the Phone Book Access Profile (PBAP).

Start of new requirements for Android 15

  • [ 7.4 .3/A-SR-1] Are STRONGLY RECOMMENDED to support Message Access Profile (MAP) if the device has the driver occupant zone .

End of new requirements

Start of new requirements for Android 15

If Automotive device implementations support Concurrent Multi-user (where multiple Android users can interact with the device concurrently, each using their own display when config_multiuserVisibleBackgroundUsers is enabled), they:

  • [ 7.4 .3/A-1-1] MUST be independent and NOT interfere with other users' BT experience.

End of new requirements

Automotive device implementations:

  • [ 7.4 .5/A] SHOULD include support for cellular network-based data connectivity.
  • [ 7.4 .5/A] MAY use the System API NetworkCapabilities#NET_CAPABILITY_OEM_PAID constant for networks that should be available to system apps.

If device implementations include support for AM/FM broadcast radio and expose the functionality to any application, they:

  • [ 7.4 /A-1-1] MUST declare support for FEATURE_BROADCAST_RADIO .

A rear-facing camera means a world-facing camera which can be located at any place on the vehicle and is facing the outside of the vehicle cabin; that is, it images scenes on the far side of the vehicle body, like the rear-view camera.

A front-facing camera means a user-facing camera which can be located at any place on the vehicle and is facing inside of the vehicle cabin; that is it images the user, such as for video conferencing and similar applications.

Automotive device implementations:

  • [7.5/A-SR-1] Are STRONGLY RECOMMENDED to include one or more world-facing cameras.
  • MAY include one or more user-facing cameras.
  • [7.5/A-SR-2] Are STRONGLY RECOMMENDED to support concurrent streaming of multiple cameras.

If Automotive device implementations include at least one camera which is world-facing then, for such a camera, they:

  • [7.5/A-1-1] MUST be oriented so that the long dimension of the camera aligns with the XY plane of Android automotive sensor axes.
  • [7.5/A-SR-3] Are STRONGLY RECOMMENDED to have either fixed-focus or EDOF (Extended Depth of Field) hardware.
  • [7.5/A-1-2] MUST have the primary world-facing camera as the world-facing camera with the lowest camera ID.

If Automotive device implementations include at least one camera which is user-facing then, for such a camera:

  • [7.5/A-2-1] The primary user-facing camera MUST be the user-facing camera with the lowest camera ID.
  • MAY be oriented so that the long dimension of the camera aligns with the XY plane of Android automotive sensor axes.

If Automotive device implementations include a camera which is accessible via either android.hardware.Camera or android.hardware.camera2 API, then they:

  • [7.5/A-3-1] MUST comply with the core camera requirements in section 7.5.

If Automotive device implementations include a camera which is not accessible via either android.hardware.Camera or android.hardware.camera2 API, then they:

  • [7.5/A-4-1] MUST be accessible via Extended View System service.

If Automotive device implementations include one or more cameras accessible via Extended View System Service, for such a camera, they:

  • [7.5/A-5-1] MUST NOT rotate or horizontally mirror the camera preview.
  • [7.5/A-SR-4] Are STRONGLY RECOMMENDED to have a resolution of at least 1.3 megapixel.

If automotive device implementations include one or more cameras which are accessible via both Extended View System Service and android.hardware.Camera or android.hardware.Camera2 API then, for such a camera, they:

  • [7.5/A-6-1] MUST report the same Camera ID.

If Automotive device implementations provide a proprietary camera API, they:

Automotive device implementations:

  • [ 7.6 .1/A-0-1] MUST have at least 4 GB of non-volatile storage available for application private data ( /data partition).

  • [ 7.6 .1/A] SHOULD format the data partition to offer improved performance and longevity on flash storage (for example, using f2fs file system).

If Automotive device implementations provide shared external storage via a portion of the internal non-removable storage, they:

  • [ 7.6 .1/A-SR-1] Are STRONGLY RECOMMENDED to reduce I/O overhead on operations performed on the external storage, for example by using SDCardFS .

Start of new requirements for Android 15

If Automotive device implementations support Concurrent Multi-user (where multiple Android users can interact with the device concurrently, each using their own display when config_multiuserVisibleBackgroundUsers is enabled), they:

  • [ 7.6 .1/A-1-1] MUST have, on a single AAOS instance, at least 4 GB for each concurrent Android user of non-volatile storage available for application private data ( /data partition).

End of new requirements

If Automotive device implementations are 64-bit:

Start of new requirements for Android 15

  • [ 7.6 .1/A-2-1] The memory available to the kernel and userspace MUST be at least 816 MB per main display if any of the following densities are used:

    • 280 dpi or lower on small/normal screens
    • ldpi or lower on extra large screens
    • mdpi or lower on large screens
  • [ 7.6 .1/A-2-2] The memory available to the kernel and userspace MUST be at least 944 MB per main display if any of the following densities are used:

    • xhdpi or higher on small/normal screens
    • hdpi or higher on large screens
    • mdpi or higher on extra large screens
  • [ 7.6 .1/A-2-3] The memory available to the kernel and userspace MUST be at least 1280 MB per main display if any of the following densities are used:

    • 400 dpi or higher on small/normal screens
    • xhdpi or higher on large screens
    • tvdpi or higher on extra large screens
  • [ 7.6 .1/A-2-4] The memory available to the kernel and userspace MUST be at least 1824 MB per main display if any of the following densities are used:

    • 560 dpi or higher on small/normal screens
    • 400 dpi or higher on large screens
    • xhdpi or higher on extra large screens

Note that the "memory available to the kernel and userspace" above refers to the memory space provided in addition to any memory already dedicated to hardware components such as radio, video, and so on that are not under the kernel's control on device implementations.

End of new requirements

Automotive device implementations:

  • [ 7.7 .1/A] SHOULD include a USB port supporting peripheral mode.

Automotive device implementations:

  • [ 7.8 .1/A-0-1] MUST include a microphone.

Automotive device implementations:

  • [ 7.8 .2/A-0-1] MUST have an audio output and declare android.hardware.audio.output .

Start of new requirements for Android 15

If Automotive device implementations support Concurrent Multi-user (where multiple Android users can interact with the device concurrently, each using their own display when config_multiuserVisibleBackgroundUsers is enabled), they:

  • [ 7.8 .2/A-1-1] MUST have an audio output device for each main display for concurrent multiple user systems.
  • [ 7.8 .2/A-1-2] MUST have a Driver audio zone covering the global cabin speaker. The front passenger zone can share the driver's audio zone or can have its own audio output.

End of new requirements

2.5.2. چند رسانه ای

Automotive device implementations MUST support the following audio encoding and decoding formats and make them available to third-party applications:

  • [ 5.1 /A-0-1] MPEG-4 AAC Profile (AAC LC)
  • [ 5.1 /A-0-2] MPEG-4 HE AAC Profile (AAC+)
  • [ 5.1 /A-0-3] AAC ELD (enhanced low delay AAC)

Automotive device implementations MUST support the following video encoding formats and make them available to third-party applications:

  • [ 5.2 /A-0-1] H.264 AVC
  • [ 5.2 /A-0-2] VP8

Automotive device implementations MUST support the following video decoding formats and make them available to third-party applications:

  • [ 5.3 /A-0-1] H.264 AVC
  • [ 5.3 /A-0-2] MPEG-4 SP
  • [ 5.3 /A-0-3] VP8
  • [ 5.3 /A-0-4] VP9

Automotive device implementations are STRONGLY RECOMMENDED to support the following video decoding:

  • [ 5.3 /A-SR-1] H.265 HEVC

Start of new requirements for Android 15

If Automotive device implementations support Concurrent Multi-user (where multiple Android users can interact with the device concurrently, each using their own display when config_multiuserVisibleBackgroundUsers is enabled), they:

  • [ 5.5 .3/A-1-1] MUST define identical volume curves for all audio output streams mapping to the same volume-group as defined in the car audio configuration file.

End of new requirements

2.5.3. نرم افزار

Automotive device implementations:

  • [ 3 /A-0-1] MUST declare the feature android.hardware.type.automotive .

  • [ 3 /A-0-2] MUST support uiMode = UI_MODE_TYPE_CAR .

  • [ 3 /A-0-3] MUST support all public APIs in the android.car.* namespace.

If Automotive device implementations provide a proprietary API using android.car.CarPropertyManager with android.car.VehiclePropertyIds , they:

  • [ 3 /A-1-1] MUST NOT attach special privileges to system application's use of these properties, or prevent third-party applications from using these properties.
  • [ 3 /A-1-2] MUST NOT replicate a vehicle property that already exists in the SDK .

Automotive device implementations:

  • [ 3.2 .1/A-0-1] MUST support and enforce all permissions constants as documented by the Automotive Permission reference page .

  • [ 3.2.3.1 /A-0-1] MUST preload one or more applications or service components with an intent handler, for all the public intent filter patterns defined by the following application intents listed here .

  • [ 3.4 .1/A-0-1] MUST provide a complete implementation of the android.webkit.Webview API.

Start of new requirements for Android 15

  • [ 3.8 /A-0-1] MUST NOT allow full secondary users who are not the current foreground user to launch activities and have access to UI on any displays.

If Automotive device implementations support Concurrent Multi-user (where multiple Android users can interact with the device concurrently, each using their own display when config_multiuserVisibleBackgroundUsers is enabled), they:

  • [ 3.8 /A-1-1] MUST implement the following predefined list of UserRestrictions for full secondary users that are not the current foreground user, but have UI access to the display assigned to them. The list of UserRestrictions are DISALLOW_CONFIG_LOCALE , DISALLOW_CONFIG_BLUETOOTH , DISALLOW_BLUETOOTH , DISALLOW_CAMERA_TOGGLE , and DISALLOW_MICROPHONE_TOGGLE .

  • [ 3.8 /A-1-2] MUST NOT allow full secondary users that are not the current foreground user but have UI access to the display assigned to them to change day/night mode, locale, date, time, time zone, or display color features (including Brightness, Night Light, Digital Wellbeing grayscale, and Reduce Bright Colors) for any other user via Settings or from an API.

End of new requirements

Automotive device implementations:

  • [ 3.8 .3/A-0-1] MUST display notifications that use the Notification.CarExtender API when requested by third-party applications.

  • [ 3.8 .4/A-SR-1] Are Strongly Recommended to implement an assistant on the device to handle the Assist action .

If Automotive device implementations include a push-to-talk button, they:

  • [ 3.8 .4/A-1-1] MUST use a short press of the push-to-talk button as the designated interaction to launch the user-selected assist app, in other words the app that implements VoiceInteractionService .

Automotive device implementations:

  • [ 3.8.3.1 /A-0-1] MUST correctly render resources as described in the Notifications on Automotive OS SDK documentation.
  • [ 3.8.3.1 /A-0-2] MUST display PLAY and MUTE for notification actions in the place of those provided through Notification.Builder.addAction()
  • [ 3.8.3.1 /A] SHOULD restrict the use of rich management tasks such as per-notification-channel controls. MAY use UI affordance per application to reduce controls.

If Automotive device implementations support User HAL properties, they:

Automotive device implementations:

If Automotive device implementations include a default launcher app, they:

Automotive device implementations:

  • [ 3.8 /A] MAY restrict the application requests to enter a full screen mode as described in immersive documentation .
  • [ 3.8 /A] MAY keep the status bar and the navigation bar visible at all times.
  • [ 3.8 /A] MAY restrict the application requests to change the colors behind the system UI elements, to ensure those elements are clearly visible at all times.

2.5.4. Performance and Power

Automotive device implementations:

  • [ 8.2 /A-0-1] MUST report the number of bytes read and written to non-volatile storage per each process's UID so the stats are available to developers through System API android.car.storagemonitoring.CarStorageMonitoringManager . The Android Open Source Project meets the requirement through the uid_sys_stats kernel module.
  • [ 8.3 /A-1-3] MUST support Garage Mode .
  • [ 8.3 /A] SHOULD be in Garage Mode for at least 15 minutes after every drive unless:
    • The battery is drained.
    • No idle jobs are scheduled.
    • The driver exits Garage Mode.
  • [ 8.4 /A-0-1] MUST provide a per-component power profile that defines the current consumption value for each hardware component and the approximate battery drain caused by the components over time as documented in the Android Open Source Project site.
  • [ 8.4 /A-0-2] MUST report all power consumption values in milliampere hours (mAh).
  • [ 8.4 /A-0-3] MUST report CPU power consumption per each process's UID. The Android Open Source Project meets the requirement through the uid_cputime kernel module implementation.
  • [ 8.4 /A] SHOULD be attributed to the hardware component itself if unable to attribute hardware component power usage to an application.
  • [ 8.4 /A-0-4] MUST make this power usage available via the adb shell dumpsys batterystats shell command to the app developer.

2.5.5. Security Model

If Automotive device implementations support multiple users, they:

If Automotive device implementations declare android.hardware.microphone , they:

  • [ 9.8.2 /A-1-1] MUST display the microphone indicator when an app is accessing audio data from the microphone, but not when the microphone is only accessed by HotwordDetectionService , SOURCE_HOTWORD , ContentCaptureService or apps holding the roles called out in section 9.1 with CDD identifier [C-4-X].
  • [ 9.8.2 /A-1-2] MUST not hide the microphone indicator for system apps that have visible user interfaces or direct user interaction.
  • [ 9.8.2 /A-1-3] MUST provide a user affordance to toggle the microphone in the Settings app.

If Automotive device implementations declare android.hardware.camera.any , then they:

  • [ 9.8.2 /A-2-1] MUST display the camera indicator when an app is accessing live camera data, but not when the camera is only being accessed by app(s) holding the roles as defined in Section 9.1 Permissions with CDD identifier [C-4-X].
  • [ 9.8.2 /A-2-2] MUST not hide the camera indicator for system apps that have visible user interfaces or direct user interaction.
  • [ 9.8.2 /A-2-3] MUST provide a user affordance to toggle the camera in the Settings app.
  • [ 9.8.2 /A-2-4] MUST display Recent and Active apps using camera as returned from PermissionManager.getIndicatorAppOpUsageData() , along with any attribution messages associated with them.

Automotive device implementations:

  • [9/A-0-1] MUST declare the android.hardware.security.model.compatible feature.
  • [ 9.11 /A-0-1] MUST back up the keystore implementation with an isolated execution environment.
  • [ 9.11 /A-0-2] MUST have implementations of RSA, AES, ECDSA and HMAC cryptographic algorithms and MD5, SHA-1, and SHA-2 family hash functions to properly support the Android Keystore system's supported algorithms in an area that is securely isolated from the code running on the kernel and above. Secure isolation MUST block all potential mechanisms by which kernel or userspace code might access the internal state of the isolated environment, including DMA. The upstream Android Open Source Project (AOSP) meets this requirement by using the Trusty implementation, but another ARM TrustZone-based solution or a third-party reviewed secure implementation of a proper hypervisor-based isolation are alternative options.
  • [ 9.11 /A-0-3] MUST perform the lock screen authentication in the isolated execution environment and only when successful, allow the authentication-bound keys to be used. Lock screen credentials MUST be stored in a way that allows only the isolated execution environment to perform lock screen authentication. The upstream Android Open Source Project provides the Gatekeeper Hardware Abstraction Layer (HAL) and Trusty, which can be used to satisfy this requirement.

Start of new requirements for Android 15

  • [ 9.11 /A-0-4] MUST support key attestation where the attestation signing key is protected by secure hardware and signing is performed in secure hardware. The attestation signing keys MUST be shared across large enough number of devices to prevent the keys prevented from being used as permanent device identifiers. One way of meeting this requirement is to share the same attestation key unless at least 100,000 units of a given SKU are produced. If more than 100,000 units of an SKU are produced, a different key MAY be used for each 100,000 units.

End of new requirements

Note that if a device implementation is already launched on an earlier Android version, such a device is exempted from the requirement to have a keystore backed by an isolated execution environment and support the key attestation, unless it declares the android.hardware.fingerprint feature which requires a keystore backed by an isolated execution environment.

Automotive device implementations:

  • [ 9.14 /A-0-1] MUST gatekeep messages from Android framework vehicle subsystems, eg, allowlisting permitted message types and message sources.
  • [ 9.14 /A-0-2] MUST watchdog against denial of service attacks from the Android framework or third-party apps. This guards against malicious software flooding the vehicle network with traffic, which may lead to malfunctioning vehicle subsystems.

2.5.6. Developer Tools and Options Compatibility

Start of new requirements for Android 15

Automotive device implementations:

  • پرفتو
    • [ 6.1 /A-0-1] MUST expose a /system/bin/perfetto binary to the shell user which cmdline complies with the perfetto documentation .
    • [ 6.1 /A-0-2] The perfetto binary MUST accept as input a protobuf config that complies with the schema defined in the perfetto documentation .
    • [ 6.1 /A-0-3] The perfetto binary MUST write as output a protobuf trace that complies with the schema defined in the perfetto documentation .
    • [ 6.1 /A-0-4] MUST provide, through the perfetto binary, at least the data sources described in the perfetto documentation .
    • [ 6.1 /A-0-5] The perfetto traced daemon MUST be enabled by default (system property persist.traced.enable ).

End of new requirements

2.6. Tablet Requirements

An Android Tablet device refers to an Android device implementation that typically meets all the following criteria:

  • Used by holding in both hands.
  • Does not have a clamshell or convertible configuration.
  • Physical keyboard implementations used with the device connect by means of a standard connection (eg USB, Bluetooth).
  • Has a power source that provides mobility, such as a battery.

  • Has a screen display size greater than 7” and less than 18", measured diagonally.

Tablet device implementations have similar requirements to handheld device implementations. The exceptions are indicated by an * in that section and noted for reference in this section.

2.6.1. سخت افزار

ژیروسکوپ

If Tablet device implementations include a 3-axis gyroscope, they:

  • [ 7.3 .4/Tab-1-1] MUST be capable of measuring orientation changes up to 1000 degrees per second.

Minimum Memory and Storage (Section 7.6.1)

The screen densities listed for small/normal screens in the handheld requirements are not applicable to tablets.

Start of new requirements for Android 15

USB peripheral mode (Section 7.7.1)

If tablet device implementations include a USB port supporting peripheral mode, they:

  • [ 7.7.1 /Tab] MAY implement the Android Open Accessory (AOA) API.

End of new requirements

Virtual Reality Mode (Section 7.9.1)

Virtual Reality High Performance (Section 7.9.2)

Virtual reality requirements are not applicable to tablets.

2.6.2. Security Model

Keys and Credentials (Section 9.11)

Refer to Section [ 9.11 ].

If Tablet device implementations include multiple users and do not declare the android.hardware.telephony feature flag, they:

  • [ 9.5 /T-1-1] MUST support restricted profiles, a feature that allows device owners to manage additional users and their capabilities on the device. With restricted profiles, device owners can quickly set up separate environments for additional users to work in, with the ability to manage finer-grained restrictions in the apps that are available in those environments.

If Tablet device implementations include multiple users and declare the android.hardware.telephony feature flag, they:

  • [ 9.5 /T-2-1] MUST NOT support restricted profiles but MUST align with the AOSP implementation of controls to enable /disable other users from accessing the voice calls and SMS.

2.6.2. نرم افزار

  • [ 3.2.3.1 /Tab-0-1] MUST preload one or more applications or service components with an intent handler, for all the public intent filter patterns defined by the following application intents listed here .

3. نرم افزار

3.1. Managed API Compatibility

The managed Dalvik bytecode execution environment is the primary vehicle for Android applications. The Android application programming interface (API) is the set of Android platform interfaces exposed to applications running in the managed runtime environment.

پیاده سازی دستگاه:

  • [C-0-1] MUST provide complete implementations, including all documented behaviors, of any documented API exposed by the Android SDK or any API decorated with the "@SystemApi" marker in the upstream Android source code.

  • [C-0-2] MUST support/preserve all classes, methods, and associated elements marked by the TestApi annotation (@TestApi).

  • [C-0-3] MUST NOT omit any managed APIs, alter API interfaces or signatures, deviate from the documented behavior, or include no-ops, except where specifically allowed by this Compatibility Definition.

  • [C-0-4] MUST still keep the APIs present and behave in a reasonable way, even when some hardware features for which Android includes APIs are omitted. See section 7 for specific requirements for this scenario.

  • [C-0-5] MUST NOT allow third-party apps to use non-SDK interfaces, which are defined as methods and fields in the Java language packages that are in the boot classpath in AOSP, and that do not form part of the public SDK. This includes APIs decorated with the @hide annotation but not with a @SystemAPI , as described in the SDK documents and private and package-private class members.

  • [C-0-6] MUST ship with each and every non-SDK interface on the same restricted lists as provided via the provisional and denylist flags in prebuilts/runtime/appcompat/hiddenapi-flags.csv path for the appropriate API level branch in the AOSP.

  • [C-0-7] MUST support the signed config dynamic update mechanism to remove non-SDK interfaces from a restricted list by embedding signed configuration in any APK, using the existing public keys present in AOSP.

    However they:

    • MAY, if a hidden API is absent or implemented differently on the device implementation, move the hidden API into the denylist or omit it from all restricted lists.
    • MAY, if a hidden API does not already exist in the AOSP, add the hidden API to any of the restricted lists.

Start of new requirements for Android 15

  • [C-0-8] MUST NOT support installing applications targeting an API level less than 23 24 .

End of new requirements

3.1.1. Android Extensions

Android supports extending the managed API surface of a particular API level by updating the extension version for that API level. The android.os.ext.SdkExtensions.getExtensionVersion(int apiLevel) API returns the extension version of the provided apiLevel , if there are extensions for that API level.

Android device implementations:

  • [C-0-1] MUST preload the AOSP implementation of both the shared library ExtShared and services ExtServices with versions greater than or equal to the minimum versions allowed per each API level. For example, Android 7.0 device implementations, running API level 24 MUST include at least version 1.

  • [C-0-2] MUST only return valid extension version number that have been defined by the AOSP.

  • [C-0-3] MUST support all the APIs defined by the extension versions returned by android.os.ext.SdkExtensions.getExtensionVersion(int apiLevel) in the same manner as other managed APIs are supported, following the requirements in section 3.1 .

3.1.2. Android Library

Due to Apache HTTP client deprecation , device implementations:

  • [C-0-1] MUST NOT place the org.apache.http.legacy library in the bootclasspath.
  • [C-0-2] MUST add the org.apache.http.legacy library to the application classpath only when the app satisfies one of the following conditions:
    • Targets API level 28 or lower.
    • Declares in its manifest that it needs the library by setting the android:name attribute of <uses-library> to org.apache.http.legacy .

The AOSP implementation meets these requirements.

3.2. Soft API Compatibility

In addition to the managed APIs from section 3.1 , Android also includes a significant runtime-only "soft" API, in the form of such things as intents, permissions, and similar aspects of Android applications that cannot be enforced at application compile time.

3.2.1. مجوزها

  • [C-0-1] Device implementers MUST support and enforce all permission constants as documented by the Permission reference page . Note that section 9 lists additional requirements related to the Android security model.

3.2.2. Build Parameters

The Android APIs include a number of constants on the android.os.Build class that are intended to describe the current device.

  • [C-0-1] To provide consistent, meaningful values across device implementations, the table below includes additional restrictions on the formats of these values to which device implementations MUST conform.
پارامتر جزئیات
VERSION.RELEASE The version of the currently-executing Android system, in human-readable format. This field MUST have one of the string values defined in Permitted Version Strings for Android 15 .
VERSION.SDK The version of the currently-executing Android system, in a format accessible to third-party application code. For Android 15, this field MUST have the integer value 15_INT.
VERSION.SDK_INT The version of the currently-executing Android system, in a format accessible to third-party application code. For Android 15, this field MUST have the integer value 15_INT.
VERSION.INCREMENTAL A value chosen by the device implementer designating the specific build of the currently-executing Android system, in human-readable format. This value MUST NOT be reused for different builds made available to end users. A typical use of this field is to indicate which build number or source-control change identifier was used to generate the build. The value of this field MUST be encodable as printable 7-bit ASCII and match the regular expression ^[^ :\/~]+$ .
هیئت مدیره A value chosen by the device implementer identifying the specific internal hardware used by the device, in human-readable format. A possible use of this field is to indicate the specific revision of the board powering the device. The value of this field MUST be encodable as 7-bit ASCII and match the regular expression ^[a-zA-Z0-9_-]+$ .
نام تجاری A value reflecting the brand name associated with the device as known to the end users. MUST be in human-readable format and SHOULD represent the manufacturer of the device or the company brand under which the device is marketed. The value of this field MUST be encodable as 7-bit ASCII and match the regular expression ^[a-zA-Z0-9_-]+$ .
SUPPORTED_ABIS The name of the instruction set (CPU type + ABI convention) of native code. See section 3.3. Native API Compatibility .
SUPPORTED_32_BIT_ABIS The name of the instruction set (CPU type + ABI convention) of native code. See section 3.3. Native API Compatibility .
SUPPORTED_64_BIT_ABIS The name of the second instruction set (CPU type + ABI convention) of native code. See section 3.3. Native API Compatibility .
CPU_ABI The name of the instruction set (CPU type + ABI convention) of native code. See section 3.3. Native API Compatibility .
CPU_ABI2 The name of the second instruction set (CPU type + ABI convention) of native code. See section 3.3. Native API Compatibility .
DEVICE A value chosen by the device implementer containing the development name or code name identifying the configuration of the hardware features and industrial design of the device. The value of this field MUST be encodable as 7-bit ASCII and match the regular expression ^[a-zA-Z0-9_-]+$ . This device name MUST NOT change during the lifetime of the product.
اثر انگشت A string that uniquely identifies this build. It SHOULD be reasonably human-readable. It MUST follow this template:

$(BRAND)/$(PRODUCT)/
$(DEVICE):$(VERSION.RELEASE)/$(ID)/$(VERSION.INCREMENTAL):$(TYPE)/$(TAGS)

به عنوان مثال:

acme/myproduct/
mydevice:15/LMYXX/3359:userdebug/test-keys

The fingerprint MUST NOT include whitespace characters. The value of this field MUST be encodable as 7-bit ASCII.

سخت افزار The name of the hardware (from the kernel command line or /proc). It SHOULD be reasonably human-readable. The value of this field MUST be encodable as 7-bit ASCII and match the regular expression ^[a-zA-Z0-9_-]+$ .
میزبان A string that uniquely identifies the host the build was built on, in human-readable format. There are no requirements on the specific format of this field, except that it MUST NOT be null or the empty string ("").
شناسه An identifier chosen by the device implementer to refer to a specific release, in human-readable format. This field can be the same as android.os.Build.VERSION.INCREMENTAL, but SHOULD be a value sufficiently meaningful for end users to distinguish between software builds. The value of this field MUST be encodable as 7-bit ASCII and match the regular expression ^[a-zA-Z0-9._-]+$ .
تولید کننده The trade name of the Original Equipment Manufacturer (OEM) of the product. There are no requirements on the specific format of this field, except that it MUST NOT be null or the empty string (""). This field MUST NOT change during the lifetime of the product.
SOC_MANUFACTURER The trade of name of the manufacturer of the primary system on chip (SOC) used in the product. Devices with the same SOC manufacturer should use the same constant value. Please ask the SOC manufacturer for the correct constant to use. The value of this field MUST be encodable as 7-bit ASCII, MUST match the regular expression ^([0-9A-Za-z ]+) , MUST NOT start or end with whitespace, and MUST NOT be equal to "unknown" . This field MUST NOT change during the lifetime of the product.
SOC_MODEL The model name of the primary system on a chip (SOC) used in the product. Devices with the same SOC model should use the same constant value. Please ask the SOC manufacturer for the correct constant to use. The value of this field MUST be encodable as 7-bit ASCII and match the regular expression ^([0-9A-Za-z ._/+-]+)$ , MUST NOT start or end with whitespace, and MUST NOT be equal to "unknown". This field MUST NOT change during the lifetime of the product.
مدل A value chosen by the device implementer containing the name of the device as known to the end user. This SHOULD be the same name under which the device is marketed and sold to end users. There are no requirements on the specific format of this field, except that it MUST NOT be null or the empty string (""). This field MUST NOT change during the lifetime of the product.
محصول A value chosen by the device implementer containing the development name or code name of the specific product (SKU) that MUST be unique within the same brand. MUST be human-readable, but is not necessarily intended for view by end users. The value of this field MUST be encodable as 7-bit ASCII and match the regular expression ^[a-zA-Z0-9_-]+$ . This product name MUST NOT change during the lifetime of the product.
ODM_SKU An optional value chosen by the device implementer that contains SKU (Stock Keeping Unit) used to track specific configurations of the device, for example, any peripherals included with the device when sold. The value of this field MUST be encodable as 7-bit ASCII and match the regular expression ^([0-9A-Za-z.,_-]+)$ .
سریال MUST return "UNKNOWN".
برچسب ها A comma-separated list of tags chosen by the device implementer that further distinguishes the build. The tags MUST be encodable as 7-bit ASCII and match the regular expression ^[a-zA-Z0-9._-]+ and MUST have one of the values corresponding to the three typical Android platform signing configurations: release-keys, dev-keys, and test-keys.
TIME A value representing the timestamp of when the build occurred.
تایپ کنید A value chosen by the device implementer specifying the runtime configuration of the build. This field MUST have one of the values corresponding to the three typical Android runtime configurations: user, userdebug, or eng.
کاربر A name or user ID of the user (or automated user) that generated the build. There are no requirements on the specific format of this field, except that it MUST NOT be null or the empty string ("").
SECURITY_PATCH A value indicating the security patch level of a build. It MUST signify that the build is not in any way vulnerable to any of the issues described up through the designated Android Public Security Bulletin. It MUST be in the format [YYYY-MM-DD], matching a defined string documented in the Android Public Security Bulletin or in the Android Security Advisory , for example "2015-11-01".
BASE_OS A value representing the FINGERPRINT parameter of the build that is otherwise identical to this build except for the patches provided in the Android Public Security Bulletin. It MUST report the correct value and if such a build does not exist, report an empty string ("").
بوت لودر A value chosen by the device implementer identifying the specific internal bootloader version used in the device, in human-readable format. The value of this field MUST be encodable as 7-bit ASCII and match the regular expression ^[a-zA-Z0-9._-]+$ .
getRadioVersion() MUST (be or return) a value chosen by the device implementer identifying the specific internal radio/modem version used in the device, in human-readable format. If a device does not have any internal radio/modem it MUST return NULL. The value of this field MUST be encodable as 7-bit ASCII and match the regular expression ^[a-zA-Z0-9._-,]+$ .
getSerial() MUST (be or return) a hardware serial number, which MUST be available and unique across devices with the same MODEL and MANUFACTURER. The value of this field MUST be encodable as 7-bit ASCII and match the regular expression ^[a-zA-Z0-9]+$ .

3.2.3. Intent Compatibility

3.2.3.1. Common Application Intents

Android intents allow application components to request functionality from other Android components. The Android upstream project includes a list of applications which implement several intent patterns to perform common actions.

پیاده سازی دستگاه:

  • [C-SR-1] Are STRONGLY RECOMMENDED to preload one or more applications or service components with an intent handler, for all the public intent filter patterns defined by the following application intents listed here and provide fulfillment ie meet with the developer expectation for these common application intents as described in the SDK.

Please refer to Section 2 for mandatory application intents for each device type.

3.2.3.2. Intent Resolution
  • [C-0-1] As Android is an extensible platform, device implementations MUST allow each intent pattern referenced in section 3.2.3.1 , except for Settings, to be overridden by third-party applications. The upstream Android open source implementation allows this by default.

  • [C-0-2] Device implementers MUST NOT attach special privileges to system applications' use of these intent patterns, or prevent third-party applications from binding to and assuming control of these patterns. This prohibition specifically includes but is not limited to disabling the "Chooser" user interface that allows the user to select between multiple applications that all handle the same intent pattern.

  • [C-0-3] Device implementations MUST provide a user interface for users to modify the default activity for intents.

  • However, device implementations MAY provide default activities for specific URI patterns (eg http://play.google.com) when the default activity provides a more specific attribute for the data URI. For example, an intent filter pattern specifying the data URI "http://www.android.com" is more specific than the browser's core intent pattern for "http://".

Android also includes a mechanism for third-party apps to declare an authoritative default app linking behavior for certain types of web URI intents. When such authoritative declarations are defined in an app's intent filter patterns, device implementations:

  • [C-0-4] MUST attempt to validate any intent filters by performing the validation steps defined in the Digital Asset Links specification as implemented by the Package Manager in the upstream Android Open Source Project.
  • [C-0-5] MUST attempt validation of the intent filters during the installation of the application and set all successfully validated URI intent filters as default app handlers for their URIs.
  • MAY set specific URI intent filters as default app handlers for their URIs, if they are successfully verified but other candidate URI filters fail verification. If a device implementation does this, it MUST provide the user appropriate per-URI pattern overrides in the settings menu.
  • MUST provide the user with per-app App Links controls in Settings as follows:
    • [C-0-6] The user MUST be able to override holistically the default app links behavior for an app to be: always open, always ask, or never open, which must apply to all candidate URI intent filters equally.
    • [C-0-7] The user MUST be able to see a list of the candidate URI intent filters.
    • The device implementation MAY provide the user with the ability to override specific candidate URI intent filters that were successfully verified, on a per-intent filter basis.
    • [C-0-8] The device implementation MUST provide users with the ability to view and override specific candidate URI intent filters if the device implementation lets some candidate URI intent filters succeed verification while some others can fail.
3.2.3.3. Intent Namespaces
  • [C-0-1] Device implementations MUST NOT include any Android component that honors any new intent or broadcast intent patterns using an ACTION, CATEGORY, or other key string in the android.* or com.android.* namespace.
  • [C-0-2] Device implementers MUST NOT include any Android components that honor any new intent or broadcast intent patterns using an ACTION, CATEGORY, or other key string in a package space belonging to another organization.
  • [C-0-3] Device implementers MUST NOT alter or extend any of the intent patterns listed in section 3.2.3.1 .
  • Device implementations MAY include intent patterns using namespaces clearly and obviously associated with their own organization. This prohibition is analogous to that specified for Java language classes in section 3.6 .
3.2.3.4. Broadcast Intents

Third-party applications rely on the platform to broadcast certain intents to notify them of changes in the hardware or software environment.

پیاده سازی دستگاه:

  • [C-0-1] MUST broadcast the public broadcast intents listed here in response to appropriate system events as described in the SDK documentation. Note that this requirement is not conflicting with section 3.5 as the limitation for background applications are also described in the SDK documentation. Also certain broadcast intents are conditional upon hardware support, if the device supports the necessary hardware they MUST broadcast the intents and provide the behavior inline with SDK documentation.
3.2.3.5. Conditional Application Intents

Android includes settings that provide users an easy way to select their default applications, for example for Home screen or SMS.

Where it makes sense, device implementations MUST provide a similar settings menu and be compatible with the intent filter pattern and API methods described in the SDK documentation as below.

If device implementations report android.software.home_screen , they:

If device implementations report android.hardware.telephony.calling , they:

If device implementations report android.hardware.nfc.hce , they:

If device implementations report android.hardware.nfc , they:

If device implementations report android.hardware.bluetooth , they:

If device implementations support the DND feature, they:

  • [C-6-1] MUST implement an activity that would respond to the intent ACTION_NOTIFICATION_POLICY_ACCESS_SETTINGS , which for implementations with UI_MODE_TYPE_NORMAL it MUST be an activity where the user can grant or deny the app access to DND policy configurations.

If device implementations allow users to use third-party input methods on the device, they:

If device implementations support third-party accessibility services, they:

  • [C-8-1] MUST honor the android.settings.ACCESSIBILITY_SETTINGS intent to provide a user-accessible mechanism to enable and disable the third-party accessibility services alongside the preloaded accessibility services.

If device implementations include support for Wi-Fi Easy Connect and expose the functionality to third-party apps, they:

If device implementations provide the data saver mode, they:

If device implementations do not provide the data saver mode, they:

If device implementations declare support for the camera via android.hardware.camera.any , they:

If device implementations report android.software.device_admin , they:

If device implementations declare the android.software.autofill feature flag, they:

If device implementations include a pre-installed app or wish to allow third-party apps to access the usage statistics, they:

  • [C-SR-2] are STRONGLY RECOMMENDED provide user-accessible mechanism to grant or revoke access to the usage stats in response to the android.settings.ACTION_USAGE_ACCESS_SETTINGS intent for apps that declare the android.permission.PACKAGE_USAGE_STATS permission.

If device implementations intend to disallow any apps, including pre-installed apps, from accessing the usage statistics, they:

  • [C-15-1] MUST still have an activity that handles the android.settings.ACTION_USAGE_ACCESS_SETTINGS intent pattern but MUST implement it as a no-op, that is to have an equivalent behavior as when the user is declined for access.

If device implementations surface links to the activities specified by AutofillService_passwordsActivity in Settings or links to user passwords through a similar mechanism, they:

  • [C-16-1] MUST surface such links for all installed autofill services.

If device implementations support the VoiceInteractionService and have more than one application using this API installed at a time, they:

If device implementations report the feature android.hardware.audio.output , they:

  • [C-SR-3] Are STRONGLY RECOMMENDED to honor android.intent.action.TTS_SERVICE, android.speech.tts.engine.INSTALL_TTS_DATA & android.speech.tts.engine.GET_SAMPLE_TEXT intents have an activity to provide fulfillment for these intents as described in SDK here .

Android includes support for interactive screensavers, previously referred to as Dreams. Screen Savers allow users to interact with applications when a device connected to a power source is idle or docked in a desk dock. Device Implementations:

  • SHOULD include support for screen savers and provide a settings option for users to configure screen savers in response to the android.settings.DREAM_SETTINGS intent.

If device implementations report android.hardware.nfc.uicc or android.hardware.nfc.ese , they:

3.2.4. Activities on secondary/multiple displays

If device implementations allow launching normal Android Activities on more than one display, they:

  • [C-1-1] MUST set the android.software.activities_on_secondary_displays feature flag.
  • [C-1-2] MUST guarantee API compatibility similar to an activity running on the primary display.
  • [C-1-3] MUST land the new activity on the same display as the activity that launched it, when the new activity is launched without specifying a target display via the ActivityOptions.setLaunchDisplayId() API.
  • [C-1-4] MUST destroy all activities, when a display with the Display.FLAG_PRIVATE flag is removed.
  • [C-1-5] MUST securely hide content on all screens when the device is locked with a secure lock screen, unless the app opts in to show on top of lock screen using Activity#setShowWhenLocked() API.
  • SHOULD have android.content.res.Configuration which corresponds to that display in order to be displayed, operate correctly, and maintain compatibility if an activity is launched on secondary display.

If device implementations allow launching normal Android Activities on secondary displays and a secondary display has the android.view.Display.FLAG_PRIVATE flag:

  • [C-3-1] Only the owner of that display, system, and activities that are already on that display MUST be able to launch to it. Everyone can launch to a display that has android.view.Display.FLAG_PUBLIC flag.

3.3. Native API Compatibility

Native code compatibility is challenging. For this reason, device implementers are:

  • [C-SR-1] STRONGLY RECOMMENDED to use the implementations of the libraries listed below from the upstream Android Open Source Project.

3.3.1. Application Binary Interfaces

Managed Dalvik bytecode can call into native code provided in the application .apk file as an ELF .so file compiled for the appropriate device hardware architecture. As native code is highly dependent on the underlying processor technology, Android defines a number of Application Binary Interfaces (ABIs) in the Android NDK.

پیاده سازی دستگاه:

  • [C-0-1] MUST be compatible with one or more defined Android NDK ABIs .
  • [C-0-2] MUST include support for code running in the managed environment to call into native code, using the standard Java Native Interface (JNI) semantics.
  • [C-0-3] MUST be source-compatible (ie header-compatible) and binary-compatible (for the ABI) with each required library in the list below.
  • [C-0-5] MUST accurately report the native Application Binary Interface (ABI) supported by the device, via the android.os.Build.SUPPORTED_ABIS , android.os.Build.SUPPORTED_32_BIT_ABIS , and android.os.Build.SUPPORTED_64_BIT_ABIS parameters, each a comma separated list of ABIs ordered from the most to the least preferred one.

Start of new requirements for Android 15

  • [C-0-6] MUST report, via the above parameters, a subset of the following list of ABIs and MUST NOT report any ABI not on the list.

End of new requirements

  • [C-0-7] MUST make all the following libraries, providing native APIs, available to apps that include native code:

    • libaaudio.so (پشتیبانی صوتی بومی AAaudio)
    • libamidi.so (پشتیبانی از MIDI بومی، اگر ویژگی android.software.midi ادعا شده باشد همانطور که در بخش 5.9 توضیح داده شده است)
    • libandroid.so (پشتیبانی از فعالیت های Android بومی)
    • libc (کتابخانه C)
    • libcamera2ndk.so
    • libdl (پیوند دهنده پویا)
    • libEGL.so (مدیریت سطح OpenGL بومی)
    • libGLESv1_CM.so (OpenGL ES 1.x)
    • libGLESv2.so (OpenGL ES 2.0)
    • libGLESv3.so (OpenGL ES 3.x)
    • libicui18n.so
    • libicuuc.so
    • libjnigraphics.so
    • liblog (لاگ اندروید)
    • libmediandk.so (پشتیبانی از APIهای رسانه بومی)
    • libm (کتابخانه ریاضی)
    • libneuralnetworks.so (API شبکه های عصبی)
    • libOpenMAXAL.so (پشتیبانی از OpenMAX AL 1.0.1)
    • libOpenSLES.so (پشتیبانی صوتی OpenSL ES 1.0.1)
    • libRS.so
    • libstdc++ (حداقل پشتیبانی از C++)
    • libvulkan.so (ولکان)
    • libz (فشرده سازی Zlib)
    • رابط JNI
  • [C-0-8] MUST NOT add or remove the public functions for the native libraries listed above.

  • [C-0-9] MUST list additional non-AOSP libraries exposed directly to third-party apps in /vendor/etc/public.libraries.txt .

  • [C-0-10] MUST NOT expose any other native libraries, implemented and provided in AOSP as system libraries, to third-party apps targeting API level 24 or higher as they are reserved.

  • [C-0-11] MUST export all the OpenGL ES 3.1 and Android Extension Pack function symbols, as defined in the NDK, through the libGLESv3.so library. Note that while all the symbols MUST be present, section 7.1.4.1 describes in more detail the requirements for when the full implementation of each corresponding functions are expected.

  • [C-0-12] MUST export function symbols for the core Vulkan 1.1 function symbols, as well as the VK_KHR_surface , VK_KHR_android_surface , VK_KHR_swapchain , VK_KHR_maintenance1 , and VK_KHR_get_physical_device_properties2 extensions through the libvulkan.so library. Note that while all the symbols MUST be present, section 7.1.4.2 describes in more detail the requirements for when the full implementation of each corresponding functions are expected.

  • SHOULD be built using the source code and header files available in the upstream Android Open Source Project.

Note that future releases of Android may introduce support for additional ABIs.

3.3.2. 32-bit ARM Native Code Compatibility

If device implementations report the support of the armeabi ABI, they:

  • [C-3-1] MUST also support armeabi-v7a and report its support, as armeabi is only for backwards compatibility with older apps.

If device implementations report the support of the armeabi-v7a ABI, for apps using this ABI, they:

  • [C-2-1] MUST include the following lines in /proc/cpuinfo , and SHOULD NOT alter the values on the same device, even when they are read by other ABIs.

    • Features: , followed by a list of any optional ARMv7 CPU features supported by the device.
    • CPU architecture: , followed by an integer describing the device's highest supported ARM architecture (eg, "8" for ARMv8 devices).
  • [C-2-2] MUST always keep the following operations available, even in the case where the ABI is implemented on an ARMv8 architecture, either through native CPU support or through software emulation:

    • SWP and SWPB instructions.
    • CP15ISB, CP15DSB, and CP15DMB barrier operations.
  • [C-2-3] MUST include support for the Advanced SIMD (aka NEON) extension.

3.4. Web Compatibility

3.4.1. WebView Compatibility

If device implementations provide a complete implementation of the android.webkit.Webview API, they:

  • [C-1-1] MUST report android.software.webview .
  • [C-1-2] MUST use the Chromium Project build from the upstream Android Open Source Project on the Android 15 branch for the implementation of the android.webkit.WebView API.
  • [C-1-3] The user agent string reported by the WebView MUST be in this format:

    Mozilla/5.0 (Linux; Android $(VERSION); [$(MODEL)] [Build/$(BUILD)]; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 $(CHROMIUM_VER) Mobile Safari/537.36

    • The value of the $(VERSION) string MUST be the same as the value for android.os.Build.VERSION.RELEASE.
    • The $(MODEL) string MAY be empty, but if it is not empty it MUST have the same value as android.os.Build.MODEL.
    • "Build/$(BUILD)" MAY be omitted, but if it is present the $(BUILD) string MUST be the same as the value for android.os.Build.ID.
    • The value of the $(CHROMIUM_VER) string MUST be the version of Chromium in the upstream Android Open Source Project.
    • Device implementations MAY omit Mobile in the user agent string.
  • The WebView component SHOULD include support for as many HTML5 features as possible and if it supports the feature SHOULD conform to the HTML5 specification .

  • [C-1-4] MUST render the provided content or remote URL content in a process that is distinct from the application that instantiates the WebView. Specifically the separate renderer process MUST hold lower privilege, run as a separate user ID, have no access to the app's data directory, have no direct network access, and only have access to the minimum-required system services over Binder. The AOSP implementation of WebView meets this requirement.

Note that if device implementations are 32-bit or declare the feature flag android.hardware.ram.low , they are exempted from C-1-3.

3.4.2. سازگاری مرورگر

If device implementations include a standalone Browser application for general web browsing, they:

  • [C-1-1] MUST support each of these APIs associated with HTML5:
  • [C-1-2] MUST support the HTML5/W3C webstorage API and SHOULD support the HTML5/W3C IndexedDB API . Note that as the web development standards bodies are transitioning to favor IndexedDB over webstorage, IndexedDB is expected to become a required component in a future version of Android.
  • MAY ship a custom user agent string in the standalone Browser application.
  • SHOULD implement support for as much of HTML5 as possible on the standalone Browser application (whether based on the upstream WebKit Browser application or a third-party replacement).

However, If device implementations do not include a standalone Browser application, they:

  • [C-2-1] MUST still support the public intent patterns as described in section 3.2.3.1 .

3.5. API Behavioral Compatibility

پیاده سازی دستگاه:

  • [C-0-9] MUST ensure that API behavioral compatibility is applied for all installed apps unless they are restricted as described in Section 3.5.1 .
  • [C-0-10] MUST NOT implement the allowlisting approach that ensures API behavioral compatibility only for apps that are selected by device implementers.

The behaviors of each of the API types (managed, soft, native, and web) must be consistent with the preferred implementation of the upstream Android Open Source Project . Some specific areas of compatibility are:

  • [C-0-1] Devices MUST NOT change the behavior or semantics of a standard intent.
  • [C-0-2] Devices MUST NOT alter the lifecycle or lifecycle semantics of a particular type of system component (such as Service, Activity, ContentProvider, etc.).
  • [C-0-3] Devices MUST NOT change the semantics of a standard permission.
  • Devices MUST NOT alter the limitations enforced on background applications. More specifically, for background apps:
    • [C-0-4] they MUST stop executing callbacks that are registered by the app to receive outputs from the GnssMeasurement and GnssNavigationMessage .
    • [C-0-5] they MUST rate-limit the frequency of updates that are provided to the app through the LocationManager API class or the WifiManager.startScan() method.
    • [C-0-6] if the app is targeting API level 25 or higher, they MUST NOT allow to register broadcast receivers for the implicit broadcasts of standard Android intents in the app's manifest, unless the broadcast intent requires a "signature" or "signatureOrSystem" protectionLevel permission or are on the exemption list .
    • [C-0-7] if the app is targeting API level 25 or higher, they MUST stop the app's background services, just as if the app had called the services' stopSelf() method, unless the app is placed on a temporary allowlist to handle a task that's visible to the user.
    • [C-0-8] if the app is targeting API level 25 or higher, they MUST release the wakelocks the app holds.
  • [C-0-11] Devices MUST return the following security providers as the first seven array values from the Security.getProviders() method, in the given order and with the given names (as returned by Provider.getName() ) and classes, unless the app has modified the list via insertProviderAt() or removeProvider() . Devices MAY return additional providers after the specified list of providers below.
    1. AndroidNSSP - android.security.net.config.NetworkSecurityConfigProvider
    2. AndroidOpenSSL - com.android.org.conscrypt.OpenSSLProvider
    3. CertPathProvider - sun.security.provider.CertPathProvider
    4. AndroidKeyStoreBCWorkaround - android.security.keystore.AndroidKeyStoreBCWorkaroundProvider
    5. BC - com.android.org.bouncycastle.jce.provider.BouncyCastleProvider
    6. HarmonyJSSE - com.android.org.conscrypt.JSSEProvider
    7. AndroidKeyStore - android.security.keystore.AndroidKeyStoreProvider

لیست فوق جامع نیست. The Compatibility Test Suite (CTS) tests significant portions of the platform for behavioral compatibility, but not all. It is the responsibility of the implementer to ensure behavioral compatibility with the Android Open Source Project. For this reason, device implementers SHOULD use the source code available via the Android Open Source Project where possible, rather than re-implement significant parts of the system.

3.5.1. Application Restriction

If device implementations implement a proprietary mechanism to restrict apps (eg changing or restricting API behaviors that are described in the SDK) and that mechanism is more restrictive than the Restricted App Standby Bucket , they:

  • [C-1-1] MUST allow the user to see the list of restricted apps.
  • [C-1-2] MUST provide user affordance to turn on / off all of these proprietary restrictions on each app.
  • [C-1-3] MUST not automatically apply these proprietary restrictions without evidence of poor system health behavior, but MAY apply the restrictions on apps upon detection of poor system health behavior like stuck wakelocks, long running services, and other criteria. The criteria MAY be determined by device implementers but MUST be related to the app's impact on the system health. Other criteria that are not purely related to the system health, such as the app's lack of popularity in the market, MUST NOT be used as criteria.

  • [C-1-4] MUST not automatically apply these proprietary restrictions for apps when a user has turned off app restrictions manually, and MAY suggest the user to apply these proprietary restrictions.

  • [C-1-5] MUST inform users if these proprietary restrictions are applied to an app automatically. Such information MUST be provided in the 24-hour period preceding the application of these proprietary restrictions.

  • [C-1-6] MUST return true for the ActivityManager.isBackgroundRestricted() method for any API calls from an app.

  • [C-1-7] MUST NOT restrict the top foreground app that is explicitly used by the user.

  • [C-1-8] MUST suspend these proprietary restrictions on an app whenever a user starts to explicitly use the app, making it the top foreground application.

  • [C-1-10] MUST provide a public and clear document or website that describes how proprietary restrictions are applied. This document or website MUST be linkable from the Android SDK documents and MUST include:

    • Triggering conditions for proprietary restrictions.
    • What and how an app can be restricted.
    • How an app can be exempted from such restrictions.
    • How an app can request an exemption from proprietary restrictions, if they support such an exemption for apps the user can install.

If an app is pre-installed on the device and has never been explicitly used by a user for more than 30 days, [C-1-3] [C-1-5] are exempted.

If device implementations extend the app restrictions that are implemented in AOSP, they:

  • [C-2-1]MUST follow the implementation described in this document .

3.5.2. Application Hibernation

If device implementations include App Hibernation that is included in AOSP or extends the feature that is included in AOSP, then they:

  • [C-1-1] MUST meet all the requirements in section 3.5.1 except for [C-1-6] and [C-1-3].
  • [C-1-2] MUST only apply the restriction on the app for a user when there is evidence that the user has not used the app for some period of time. This duration is STRONGLY RECOMMENDED to be one month or longer. Usage MUST be defined by either explicit user interaction via the UsageStats#getLastTimeVisible() API or anything that would cause an app to leave the force-stopped state, including service bindings, content provider bindings, explicit broadcasts, etc., which will be tracked by a new API UsageStats#getLastTimeAnyComponentUsed().
  • [C-1-3] MUST only apply restrictions affecting all device users when there is evidence that the package has not been used by ANY user for some period of time. This duration is STRONGLY RECOMMENDED to be one month or longer.
  • [C-1-4] MUST NOT render the app unable to respond to activity intents, service bindings, content provider requests, or explicit broadcasts.

App Hibernation in AOSP meets the above requirements.

3.6. API Namespaces

Android follows the package and class namespace conventions defined by the Java programming language. To ensure compatibility with third-party applications, device implementers MUST NOT make any prohibited modifications (see below) to these package namespaces:

  • java.*
  • javax.*
  • sun.*
  • android.*
  • androidx.*
  • com.android.*

That is, they:

  • [C-0-1] MUST NOT modify the publicly exposed APIs on the Android platform by changing any method or class signatures, or by removing classes or class fields.
  • [C-0-2] MUST NOT add any publicly exposed elements (such as classes or interfaces, or fields or methods to existing classes or interfaces) or Test or System APIs to the APIs in the above namespaces. A "publicly exposed element" is any construct that is not decorated with the "@hide" marker as used in the upstream Android source code.

Device implementers MAY modify the underlying implementation of the APIs, but such modifications:

  • [C-0-3] MUST NOT impact the stated behavior and Java-language signature of any publicly exposed APIs.
  • [C-0-4] MUST NOT be advertised or otherwise exposed to developers.

However, device implementers MAY add custom APIs outside the standard Android namespace, but the custom APIs:

  • [C-0-5] MUST NOT be in a namespace owned by or referring to another organization. For instance, device implementers MUST NOT add APIs to the com.google.* or similar namespace: only Google may do so. Similarly, Google MUST NOT add APIs to other companies' namespaces.
  • [C-0-6] MUST be packaged in an Android shared library so that only apps that explicitly use them (via the <uses-library> mechanism) are affected by the increased memory usage of such APIs.

Device implementers MAY add custom APIs in native languages, outside of the NDK APIs, but the custom APIs:

  • [C-1-1] MUST NOT be in a NDK library or a library owned by another organization as described here .

If a device implementer proposes to improve one of the package namespaces above (such as by adding useful new functionality to an existing API, or adding a new API), the implementer SHOULD visit source.android.com and begin the process for contributing changes and code, according to the information on that site.

Note that the restrictions above correspond to standard conventions for naming APIs in the Java programming language; this section simply aims to reinforce those conventions and make them binding through inclusion in this Compatibility Definition.

3.7. Runtime Compatibility

پیاده سازی دستگاه:

  • [C-0-1] MUST support the full Dalvik Executable (DEX) format and Dalvik bytecode specification and semantics .

  • [C-0-2] MUST configure Dalvik runtimes to allocate memory in accordance with the upstream Android platform, and as specified by the following table. (See section 7.1.1 for screen size and screen density definitions.)

  • SHOULD use Android RunTime (ART), the reference upstream implementation of the Dalvik Executable Format, and the reference implementation's package management system.

  • SHOULD run fuzz tests under various modes of execution and target architectures to assure the stability of the runtime. Refer to JFuzz and DexFuzz in the Android Open Source Project website.

Note that memory values specified below are considered minimum values and device implementations MAY allocate more memory per application.

Screen Layout تراکم صفحه نمایش Minimum Application Memory
Android Watch 120 dpi (ldpi) 32 مگابایت
140 dpi (140dpi)
160 dpi (mdpi)
180 dpi (180dpi)
200 dpi (200dpi)
213 dpi (tvdpi)
220 dpi (220dpi) 36 مگابایت
240 dpi (hdpi)
280 dpi (280dpi)
320 dpi (xhdpi) 48 مگابایت
360 dpi (360dpi)
400 dpi (400dpi) 56MB
420 dpi (420dpi) 64 مگابایت
480 dpi (xxhdpi) 88 مگابایت
560 dpi (560dpi) 112MB
640 dpi (xxxhdpi) 154 مگابایت
small/normal 120 dpi (ldpi) 32 مگابایت
140 dpi (140dpi)
160 dpi (mdpi)
180 dpi (180dpi) 48 مگابایت
200 dpi (200dpi)
213 dpi (tvdpi)
220 dpi (220dpi)
240 dpi (hdpi)
280 dpi (280dpi)
320 dpi (xhdpi) 80 مگابایت
360 dpi (360dpi)
400 dpi (400dpi) 96MB
420 dpi (420dpi) 112MB
480 dpi (xxhdpi) 128 مگابایت
560 dpi (560dpi) 192MB
640 dpi (xxxhdpi) 256 مگابایت
بزرگ 120 dpi (ldpi) 32 مگابایت
140 dpi (140dpi) 48 مگابایت
160 dpi (mdpi)
180 dpi (180dpi) 80 مگابایت
200 dpi (200dpi)
213 dpi (tvdpi)
220 dpi (220dpi)
240 dpi (hdpi)
280 dpi (280dpi) 96MB
320 dpi (xhdpi) 128 مگابایت
360 dpi (360dpi) 160MB
400 dpi (400dpi) 192MB
420 dpi (420dpi) 228 مگابایت
480 dpi (xxhdpi) 256 مگابایت
560 dpi (560dpi) 384MB
640 dpi (xxxhdpi) 512MB
xlarge 120 dpi (ldpi) 48 مگابایت
140 dpi (140dpi) 80 مگابایت
160 dpi (mdpi)
180 dpi (180dpi) 96MB
200 dpi (200dpi)
213 dpi (tvdpi)
220 dpi (220dpi)
240 dpi (hdpi)
280 dpi (280dpi) 144MB
320 dpi (xhdpi) 192MB
360 dpi (360dpi) 240MB
400 dpi (400dpi) 288 مگابایت
420 dpi (420dpi) 336MB
480 dpi (xxhdpi) 384MB
560 dpi (560dpi) 576MB
640 dpi (xxxhdpi) 768MB

3.8. User Interface Compatibility

3.8.1. Launcher (Home Screen)

Android includes a launcher application (home screen) and support for third-party applications to replace the device launcher (home screen).

If device implementations allow third-party applications to replace the device home screen, they:

  • [C-1-1] MUST declare the platform feature android.software.home_screen .
  • [C-1-2] MUST return the AdaptiveIconDrawable object when the third-party application use <adaptive-icon> tag to provide their icon, and the PackageManager methods to retrieve icons are called.

If device implementations include a default launcher that supports in-app pinning of shortcuts, they:

Conversely, if device implementations do not support in-app pinning of shortcuts, they:

If device implementations implement a default launcher that provides quick access to the additional shortcuts provided by third-party apps through the ShortcutManager API, they:

  • [C-4-1] MUST support all documented shortcut features (eg static and dynamic shortcuts, pinning shortcuts) and fully implement the APIs of the ShortcutManager API class.

If device implementations include a default launcher app that shows badges for the app icons, they:

  • [C-5-1] MUST respect the NotificationChannel.setShowBadge() API method. In other words, show a visual affordance associated with the app icon if the value is set as true , and do not show any app icon badging scheme when all of the app's notification channels have set the value as false .
  • MAY override the app icon badges with their proprietary badging scheme when third-party applications indicate support of the proprietary badging scheme through the use of proprietary APIs, but SHOULD use the resources and values provided through the notification badges APIs described in the SDK , such as the Notification.Builder.setNumber() and the Notification.Builder.setBadgeIconType() API.

If device implementations support monochrome icons, these icons:

  • [C-6-1] MUST be used only when a user explicitly enables them (eg via Settings or wallpaper picker menu).

3.8.2. ابزارک ها

Android supports third-party app widgets by defining a component type and corresponding API and lifecycle that allows applications to expose an "AppWidget" to the end user.

If device implementations support third-party app widgets, they:

  • [C-1-1] MUST declare support for platform feature android.software.app_widgets .
  • [C-1-2] MUST include built-in support for AppWidgets and expose user interface affordances to add, configure, view, and remove AppWidgets
  • [C-1-3] MUST be capable of rendering widgets that are 4 x 4 in the standard grid size. See the App Widget DesignGuidelines in the Android SDK documentation for details.
  • MAY support application widgets on the lock screen.

If device implementations support third-party app widgets and in-app pinning of shortcuts, they:

3.8.3. اطلاعیه ها

Android includes Notification and NotificationManager APIs that allow third-party app developers to notify users of notable events and attract users' attention using the hardware components (eg sound, vibration and light) and software features (eg notification shade, system bar) of the device .

3.8.3.1. Presentation of Notifications

If device implementations allow third-party apps to notify users of notable events , they:

  • [C-1-1] MUST support notifications that use hardware features, as described in the SDK documentation, and to the extent possible with the device implementation hardware. For instance, if a device implementation includes a vibrator, it MUST correctly implement the vibration APIs. If a device implementation lacks hardware, the corresponding APIs MUST be implemented as no-ops. This behavior is further detailed in section 7 .
  • [C-1-2] MUST correctly render all resources (icons, animation files, etc.) provided for in the APIs, or in the Status/System Bar icon style guide , although they MAY provide an alternative user experience for notifications than that provided by the reference Android Open Source implementation.
  • [C-1-3] MUST honor and implement properly the behaviors described for the APIs to update, remove and group notifications.
  • [C-1-4] MUST provide the full behavior of the NotificationChannel API documented in the SDK.
  • [C-1-5] MUST provide a user affordance to block and modify a certain third-party app's notification per each channel and app package level.
  • [C-1-6] MUST also provide a user affordance to display deleted notification channels.
  • [C-1-7] MUST correctly render all resources (images, stickers, icons, etc.) provided through Notification.MessagingStyle alongside the notification text without additional user interaction. For example, MUST show all resources including icons provided through android.app.Person in a group conversation that is set through setGroupConversation .

  • [C-SR-1] Are STRONGLY RECOMMENDED to provide an affordance for the user to control the notifications that are exposed to apps that have been granted the Notification Listener permission. The granularity MUST be so that the user can control for each such notification listener what notification types are bridged to this listener. The types MUST include "conversations", "alerting", "silent", and "important ongoing" notifications.

  • [C-SR-2] Are STRONGLY RECOMMENDED provide an affordance for users to specify apps to exclude from notifying any specific notification listener.

  • [C-SR-3] Are STRONGLY RECOMMENDED to automatically surface a user affordance to block a certain third-party app's notification per each channel and app package level after the user dismisses that notification multiple times.

  • SHOULD support rich notifications.

  • SHOULD present some higher priority notifications as heads-up notifications.

  • SHOULD have a user affordance to snooze notifications.

  • MAY only manage the visibility and timing of when third-party apps can notify users of notable events to mitigate safety issues such as driver distraction.

Android 11 introduces support for conversation notifications, which are notifications that use MessagingStyle and provides a published People Shortcut ID.

پیاده سازی دستگاه:

  • [C-SR-4] Are STRONGLY RECOMMENDED to group and display conversation notifications ahead of non conversation notifications with the exception of ongoing foreground service notifications and importance:high notifications.

If device implementations support conversation notifications and the app provides the required data for bubbles , they:

  • [C-SR-5] Are STRONGLY RECOMMENDED to display this conversation as a bubble. The AOSP implementation meets these requirements with the default System UI, Settings, and Launcher.

If device implementations support rich notifications, they:

  • [C-2-1] MUST use the exact resources as provided through the Notification.Style API class and its subclasses for the presented resource elements.
  • SHOULD present each and every resource element (eg icon, title and summary text) defined in the Notification.Style API class and its subclasses.

Heads up notifications are notifications that are presented to the user as they come in independently of the surface the user is on. If device implementations support heads-up notifications, then they:

  • [C-3-1] MUST use the heads-up notification view and resources as described in the Notification.Builder API class when heads-up notifications are presented.
  • [C-3-2] MUST display the actions provided through Notification.Builder.addAction() together with the notification content without additional user interaction as described in the SDK .
3.8.3.2. Notification Listener Service

Android includes the NotificationListenerService APIs that allow apps (once explicitly enabled by the user) to receive a copy of all notifications as they are posted or updated.

پیاده سازی دستگاه:

  • [C-0-1] MUST correctly and promptly update notifications in their entirety to all such installed and user-enabled listener services, including any and all metadata attached to the Notification object.
  • [C-0-2] MUST respect the snoozeNotification() API call, and dismiss the notification and make a callback after the snooze duration that is set in the API call.

If device implementations have a user affordance to snooze notifications, they:

  • [C-1-1] MUST reflect the snoozed notification status properly through the standard APIs such as NotificationListenerService.getSnoozedNotifications() .
  • [C-1-2] MUST make this user affordance available to snooze notifications from each installed third-party app's, unless they are from persistent/foreground services.
3.8.3.3. DND (Do not Disturb) / Priority Mode

If device implementations support the DND feature (also called Priority Mode), they:

  • [C-1-1] MUST, for when the device implementation has provided a means for the user to grant or deny third-party apps to access the DND policy configuration, display Automatic DND rules created by applications alongside the user-created and predefined قوانین.
  • [C-1-3] MUST honor the suppressedVisualEffects values passed along the NotificationManager.Policy and if an app has set any of the SUPPRESSED_EFFECT_SCREEN_OFF or SUPPRESSED_EFFECT_SCREEN_ON flags, it SHOULD indicate to the user that the visual effects are suppressed in the DND settings menu.

Start of new requirements for Android 15

3.8.3.4. Sensitive Notification Protection

Sensitive notification information includes content such as one-time passwords, one-time confirmation codes, and similar authentication or reset codes that can appear in notifications to users.

If device implementations allow third-party apps to notify users of notable events , they:

  • [C-1-1] MUST redact sensitive notification information from being passed to notification listeners, unless the listener service is one of:

    • System signed apps with a uid < 10000
    • رابط کاربری سیستم
    • پوسته
    • Designated Companion Device App (defined by CompanionDeviceManager )
    • SYSTEM_AUTOMOTIVE_PROJECTION role
    • SYSTEM_NOTIFICATION_INTELLIGENCE role
    • HOME role

The AOSP implementation of NotificationAssistantServices exemplifies and meets these requirements. See android.ext.services.notification for an example.

End of new requirements

3.8.4. Assist APIs

Android includes the Assist APIs to allow applications to elect how much information of the current context is shared with the assistant on the device.

If device implementations support the Assist action, they:

  • [C-2-1] MUST indicate clearly to the end user when the context is shared, by either:
    • Each time the assist app accesses the context, displaying a white light around the edges of the screen that meet or exceed the duration and brightness of the Android Open Source Project implementation.
    • For the preinstalled assist app, providing a user affordance less than two navigations away from the default voice input and assistant app settings menu , and only sharing the context when the assist app is explicitly invoked by the user through a hotword or assist navigation key input.
  • [C-2-2] The designated interaction to launch the assist app as described in section 7.2.3 MUST launch the user-selected assist app, in other words the app that implements VoiceInteractionService , or an activity handling the ACTION_ASSIST intent.

3.8.5. Alerts and Toasts

Applications can use the Toast API to display short non-modal strings to the end user that disappear after a brief period of time, and use the TYPE_APPLICATION_OVERLAY window type API to display alert windows as an overlay over other apps.

If device implementations include a screen or video output, they:

  • [C-1-1] MUST provide a user affordance to block an app from displaying alert windows that use the TYPE_APPLICATION_OVERLAY . The AOSP implementation meets this requirement by having controls in the notification shade.

  • [C-1-2] MUST honor the Toast API and display Toasts from applications to end users in some highly visible manner.

3.8.6. تم ها

Android provides "themes" as a mechanism for applications to apply styles across an entire Activity or application.

Android includes a "Holo" and "Material" theme family as a set of defined styles for application developers to use if they want to match the Holo theme look and feel as defined by the Android SDK.

If device implementations include a screen or video output, they:

  • [C-1-1] MUST NOT alter any of the Holo theme attributes exposed to applications.
  • [C-1-2] MUST support the "Material" theme family and MUST NOT alter any of the Material theme attributes or their assets exposed to applications.
  • [C-1-3] MUST either set the "sans-serif" font family to Roboto version 2.x for the languages that Roboto supports, or provide a user affordance to change the font used for the "sans-serif" font family to Roboto version 2.x for the languages that Roboto supports.

  • [C-1-4] MUST generate dynamic color tonal palettes as specified in the AOSP documentation of Settings.THEME_CUSTOMIZATION_OVERLAY_PACKAGES (see android.theme.customization.system_palette and android.theme.customization.theme_style ).

  • [C-1-5] MUST generate dynamic color tonal palettes using color theme styles enumerated in the Settings.THEME_CUSTOMIZATION_OVERLAY_PACKAGES documentation (see android.theme.customization.theme_styles ), namely TONAL_SPOT , VIBRANT , EXPRESSIVE , SPRITZ , RAINBOW , FRUIT_SALAD , and MONOCHROMATIC .

    "Source color" used to generate dynamic color tonal palettes when sent with android.theme.customization.system_palette (as documented in Settings.THEME_CUSTOMIZATION_OVERLAY_PACKAGES ).

  • [C-1-6] MUST have a CAM16 chroma value of 5 or larger.

    • SHOULD be derived from the wallpaper via com.android.systemui.monet.ColorScheme#getSeedColors , which provides multiple valid source colors to pick one from.

    • SHOULD use the value 0xFF1B6EF3 , if none of the provided colors meet the above source color requirement.

Android also includes a "Device Default" theme family as a set of defined styles for application developers to use if they want to match the look and feel of the device theme as defined by the device implementer.

Android supports a variant theme with translucent system bars, which allows application developers to fill the area behind the status and navigation bar with their app content. To enable a consistent developer experience in this configuration, it is important the status bar icon style is maintained across different device implementations.

If device implementations include a system status bar, they:

  • [C-2-1] MUST use white for system status icons (such as signal strength and battery level) and notifications issued by the system, unless the icon is indicating a problematic status or an app requests a light status bar using the WindowInsetsController#APPEARANCE_LIGHT_STATUS_BARS flag.
  • [C-2-2] Android device implementations MUST change the color of the system status icons to black (for details, refer to R.style ) when an app requests a light status bar.

3.8.7. تصاویر پس زمینه زنده

Android defines a component type and corresponding API and lifecycle that allows applications to expose one or more "Live Wallpapers" to the end user. Live wallpapers are animations, patterns, or similar images with limited input capabilities that display as a wallpaper, behind other applications.

Hardware is considered capable of reliably running live wallpapers if it can run all live wallpapers, with no limitations on functionality, at a reasonable frame rate with no adverse effects on other applications. If limitations in the hardware cause wallpapers and/or applications to crash, malfunction, consume excessive CPU or battery power, or run at unacceptably low frame rates, the hardware is considered incapable of running live wallpaper. As an example, some live wallpapers may use an OpenGL 2.0 or 3.x context to render their content. Live wallpaper will not run reliably on hardware that does not support multiple OpenGL contexts because the live wallpaper use of an OpenGL context may conflict with other applications that also use an OpenGL context.

  • Device implementations capable of running live wallpapers reliably as described above SHOULD implement live wallpapers.

If device implementations implement live wallpapers, they:

  • [C-1-1] MUST report the platform feature flag android.software.live_wallpaper.

3.8.8. Activity Switching

The upstream Android source code includes the overview screen , a system-level user interface for task switching and displaying recently accessed activities and tasks using a thumbnail image of the application's graphical state at the moment the user last left the application.

Device implementations including the recents function navigation key as detailed in section 7.2.3 MAY alter the interface.

If device implementations including the recents function navigation key as detailed in section 7.2.3 alter the interface, they:

  • [C-1-1] MUST support at least up to 7 displayed activities.
  • SHOULD at least display the title of 4 activities at a time.
  • SHOULD display highlight color, icon, screen title in recents.
  • SHOULD display a closing affordance ("x") but MAY delay this until user interacts with screens.
  • SHOULD implement a shortcut to switch easily to the previous activity.
  • SHOULD trigger the fast-switch action between the two most recently used apps, when the recents function key is tapped twice.
  • SHOULD trigger the split-screen multiwindow-mode, if supported, when the recents functions key is long pressed.
  • MAY display affiliated recents as a group that moves together.
  • [C-SR-1] Are STRONGLY RECOMMENDED to use the upstream Android user interface (or a similar thumbnail-based interface) for the overview screen.

3.8.9. مدیریت ورودی

Android includes support for Input Management and support for third-party input method editors.

If device implementations allow users to use third-party input methods on the device, they:

  • [C-1-1] MUST declare the platform feature android.software.input_methods and support IME APIs as defined in the Android SDK documentation.

3.8.10. Lock Screen Media Control

The Remote Control Client API is deprecated from Android 5.0 in favor of the Media Notification Template that allows media applications to integrate with playback controls that are displayed on the lock screen.

3.8.11. Screen savers (previously Dreams)

See section 3.2.3.5 for settings intent to congfigure screen savers.

3.8.12. مکان

If device implementations include a hardware sensor (eg GPS) that is capable of providing the location coordinates, they

3.8.13. Unicode and Font

Android includes support for the emoji characters defined in Unicode 10.0 .

If device implementations include a screen or video output, they:

  • [C-1-1] MUST be capable of rendering these emoji characters in color glyph.
  • [C-1-2] MUST include support for:
    • Roboto 2 font with different weights—sans-serif-thin, sans-serif-light, sans-serif-medium, sans-serif-black, sans-serif-condensed, sans-serif-condensed-light for the languages available on the دستگاه
    • Full Unicode 7.0 coverage of Latin, Greek, and Cyrillic, including the Latin Extended A, B, C, and D ranges, and all glyphs in the currency symbols block of Unicode 7.0.
  • [C-1-3] MUST NOT remove or modify NotoColorEmoji.tff in the system image. (It is acceptable to add a new emoji font to override emoji in NotoColorEmoji.tff)
  • SHOULD support the skin tone and diverse family emoji as specified in the Unicode Technical Report #51 .

If device implementations include an IME, they:

  • SHOULD provide an input method to the user for these emoji characters.

Android includes support to render Myanmar fonts. Myanmar has several non-Unicode compliant fonts, commonly known as "Zawgyi," for rendering Myanmar languages.

If device implementations include support for Burmese, they:

  • [C-2-1] MUST render text with Unicode compliant font as default; non-Unicode compliant font MUST NOT be set as default font unless the user chooses it in the language picker.
  • [C-2-2] MUST support a Unicode font and a non-Unicode compliant font if a non-Unicode compliant font is supported on the device. Non-Unicode compliant font MUST NOT remove or overwrite the Unicode font.
  • [C-2-3] MUST render text with non-Unicode compliant font ONLY IF a language code with script code Qaag is specified (eg my-Qaag). No other ISO language or region codes (whether assigned, unassigned, or reserved) can be used to refer to non-Unicode compliant font for Myanmar. App developers and web page authors can specify my-Qaag as the designated language code as they would for any other language.

3.8.14. Multi-windows

If device implementations have the capability to display multiple activities at the same time, they:

  • [C-1-1] MUST implement such multi-window mode(s) in accordance with the application behaviors and APIs described in the Android SDK multi-window mode support documentation and meet the following requirements:
  • [C-1-2] MUST honor android:resizeableActivity that is set by an app in the AndroidManifest.xml file as described in this SDK .
  • [C-1-3] MUST NOT offer split-screen or freeform mode if the screen height is less than 440 dp and the screen width is less than 440 dp.
  • [C-1-4] An activity MUST NOT be resized to a size smaller than 220dp in multi-window modes other than Picture-in-Picture.
  • Device implementations with screen size xlarge SHOULD support freeform mode.

If device implementations support multi-window mode(s), and the split screen mode, they:

  • [C-2-2] MUST crop the docked activity of a split-screen multi-window but SHOULD show some content of it, if the Launcher app is the focused window.
  • [C-2-3] MUST honor the declared AndroidManifestLayout_minWidth and AndroidManifestLayout_minHeight values of the third-party launcher application and not override these values in the course of showing some content of the docked activity.

If device implementations support multi-window mode(s) and Picture-in-Picture multi-window mode, they:

  • [C-3-1] MUST launch activities in picture-in-picture multi-window mode when the app is: * Targeting API level 26 or higher and declares android:supportsPictureInPicture * Targeting API level 25 or lower and declares both android:resizeableActivity and android:supportsPictureInPicture .
  • [C-3-2] MUST expose the actions in their SystemUI as specified by the current PIP activity through the setActions() API.
  • [C-3-3] MUST support aspect ratios greater than or equal to 1:2.39 and less than or equal to 2.39:1, as specified by the PIP activity through the setAspectRatio() API.
  • [C-3-4] MUST use KeyEvent.KEYCODE_WINDOW to control the PIP window; if PIP mode is not implemented, the key MUST be available to the foreground activity.
  • [C-3-5] MUST provide a user affordance to block an app from displaying in PIP mode; the AOSP implementation meets this requirement by having controls in the notification shade.
  • [C-3-6] MUST allocate the following minimum width and height for the PIP window when an application does not declare any value for AndroidManifestLayout_minWidth and AndroidManifestLayout_minHeight :

    • Devices with the Configuration.uiMode that is set other than UI_MODE_TYPE_TELEVISION MUST allocate a minimum width and height of 108 dp.
    • Devices with the Configuration.uiMode that is set to UI_MODE_TYPE_TELEVISION MUST allocate a minimum width of 240 dp and a minimum height of 135 dp.

Start of new requirements for Android 15

If device implementations include more than one Android-compatible display areas and make such areas available to apps, they:

  • [C-4-1] MUST support multi-window mode.

If device implementations support multi-window mode(s), they:

  • [C-5-1] MUST implement the correct version of the Window Manager Extensions API level as described in WindowManager Extensions .

End of new requirements

3.8.15. Display Cutout

Android supports a Display Cutout as described in the SDK document. The DisplayCutout API defines an area on the edge of the display that may not be functional for an application due to a display cutout or curved display on the edge(s).

If device implementations include display cutout(s), they:

  • [C-1-5] MUST NOT have cutout(s) if the device's aspect ratio is 1.0(1:1).
  • [C-1-2] MUST NOT have more than one cutout per edge.
  • [C-1-3] MUST honor the display cutout flags set by the app through the WindowManager.LayoutParams API as described in the SDK.
  • [C-1-4] MUST report correct values for all cutout metrics defined in the DisplayCutout API.

3.8.16. کنترل های دستگاه

Android includes ControlsProviderService and Control APIs to allow third-party applications to publish device controls for quick status and action for users.

See Section 2_2_3 for device-specific requirements.

3.8.17. کلیپ بورد

پیاده سازی دستگاه:

  • [C-0-1] MUST NOT send clipboard data to any component, activity, service, or across any network connection, without explicit user action (eg, pressing a button on the overlay) or indication of content being sent, except for services mentioned in 9.8.6 Content Capture and App Search .

If device implementations generate a user-visible preview when content is copied to the clipboard for any ClipData item where ClipData.getDescription().getExtras() contains android.content.extra.IS_SENSITIVE , they:

  • [C-1-1] MUST redact the user visible preview

The AOSP reference implementation satisfies these clipboard requirements.

3.9. Device Administration

Start of new requirements for Android 15

Android includes features that allow security-aware enable device policy controller applications to perform device administration functions at the system level, such as enforcing password policies or performing remote wipe, through the Android Device Administration API Device Policy Manager APIs .

If device implementations implement the full range of device administration policies defined in the Android SDK documentation, they:

  • [C-1-1] MUST declare android.software.device_admin .
  • [C-1-2] MUST support device owner provisioning as described in section 3.9.1 and section 3.9.1.1 .

End of new requirements

3.9.1. Device Provisioning

3.9.1.1. Device owner provisioning

If device implementations declare android.software.device_admin , they:

  • [C-1-1] MUST support enrolling a Device Policy Client (DPC) as a Device Owner app as described below:
    • When the device implementation has neither users nor user data configured, it:
      • [C-1-5] MUST enroll the DPC application as the Device Owner app or enable the DPC app to choose whether to become a Device Owner or a Profile Owner, if the device declares Near-Field Communications (NFC) support via the feature flag android.hardware.nfc and receives an NFC message containing a record with MIME type MIME_TYPE_PROVISIONING_NFC .
      • [C-1-8] MUST send the ACTION_GET_PROVISIONING_MODE intent after device owner provisioning is triggered so that the DPC app can choose whether to become a Device Owner or a Profile Owner, depending on the values of android.app.extra.PROVISIONING_ALLOWED_PROVISIONING_MODES , unless it can be determined from context that there is only one valid option.
      • [C-1-9] MUST send the ACTION_ADMIN_POLICY_COMPLIANCE intent to the Device Owner app if a Device Owner is established during provisioning regardless of the provisioning method used. The user must not be able to proceed in the Setup Wizard until the Device Owner app finishes.
    • When the device implementation has users or user data, it:
      • [C-1-7] MUST not enroll any DPC application as the Device Owner App any more.

Start of new requirements for Android 15

  • [C-1-2] MUST show an appropriate disclosure notice (such as referenced in AOSP ) and obtain affirmative consent from the end user prior to an app being set as Device Owner, unless the device is programmatically configured for Retail Demo Mode prior to on-screen, end-user interaction. If device implementations declare android.software.device_admin , but also include a proprietary device management solution and provide a mechanism to promote an application configured in their solution as a "Device Owner equivalent" to the standard "Device Owner" as recognized by the standard Android DevicePolicyManager APIs, they:

  • [C-2-1] MUST have a process in place to verify that the specific app being promoted belongs to a legitimate enterprise device management solution and has been configured in the proprietary solution to have the rights equivalent as a "Device Owner".

  • [C-2-2] MUST show the same AOSP Device Owner consent disclosure as the flow initiated by android.app.action.PROVISION_MANAGED_DEVICE prior to enrolling the DPC application as "Device Owner".

  • [C-2-3] MUST NOT hard code the consent or prevent the use of other device owner apps.

End of new requirements

3.9.1.2. Managed profile provisioning

If device implementations declare android.software.managed_users , they:

Start of new requirements for Android 15

  • [C-1-2] The managed profile provisioning process (the flow initiated by the DPC using the android.app.action.PROVISION_MANAGED_PROFILE ) or by the platform), consent screen and user experience MUST align with the AOSP implementation.

End of new requirements

3.9.2. Managed Profile Support

If device implementations declare android.software.managed_users , they:

  • [C-1-1] MUST support managed profiles via the android.app.admin.DevicePolicyManager APIs.
  • [C-1-2] MUST allow one and only one managed profile to be created .
  • [C-1-3] MUST use an icon badge (similar to the AOSP upstream work badge) to represent the managed applications and widgets and other badged UI elements like Recents & Notifications.
  • [C-1-4] MUST display a notification icon (similar to the AOSP upstream work badge) to indicate when user is within a managed profile application.
  • [C-1-5] MUST display a toast indicating that the user is in the managed profile if and when the device wakes up (ACTION_USER_PRESENT) and the foreground application is within the managed profile.
  • [C-1-6] Where a managed profile exists, MUST show a visual affordance in the Intent 'Chooser' to allow the user to forward the intent from the managed profile to the primary user or vice versa, if enabled by the Device Policy کنترل کننده.
  • [C-1-7] Where a managed profile exists, MUST expose the following user affordances for both the primary user and the managed profile:
    • Separate accounting for battery, location, mobile data and storage usage for the primary user and managed profile.
    • Independent management of VPN Applications installed within the primary user or managed profile.
    • Independent management of applications installed within the primary user or managed profile.
    • Independent management of accounts within the primary user or managed profile.
  • [C-1-8] MUST ensure the preinstalled dialer, contacts and messaging applications can search for and look up caller information from the managed profile (if one exists) alongside those from the primary profile, if the Device Policy Controller permits it.
  • [C-1-9] MUST ensure that it satisfies all the security requirements applicable for a device with multiple users enabled (see section 9.5 ), even though the managed profile is not counted as another user in addition to the primary user.
  • [C-1-10] MUST ensure that the screenshot data is saved in the work profile storage when a screenshot is captured with a topActivity window that has focus (the one the user interacted with last among all activities) and belongs to a work profile برنامه
  • [C-1-11] MUST NOT capture any other screen content (system bar, notifications or any personal profile content) except for the work profile application window/windows when saving a screenshot to the work profile (to ensure that personal profile data is not saved in the work profile).

If device implementations declare android.software.managed_users and android.software.secure_lock_screen , they:

  • [C-2-1] MUST support the ability to specify a separate lock screen meeting the following requirements to grant access to apps running in a managed profile only.
  • When contacts from the managed profile are displayed in the preinstalled call log, in-call UI, in-progress and missed-call notifications, contacts and messaging apps they SHOULD be badged with the same badge used to indicate managed profile applications.

3.9.3. Managed User Support

If device implementations declare android.software.managed_users , they:

  • [C-1-1] MUST provide a user affordance to logout from the current user and switch back to the primary user in multiple-user session when isLogoutEnabled returns true . The user affordance MUST be accessible from the lockscreen without unlocking the device.

If device implementations declare android.software.device_admin and provide an on-device user affordance to add additional secondary Users , they:

  • [C-SR-1] Are STRONGLY RECOMMENDED show the same AOSP Device Owner consent disclosures that were shown in the flow initiated by android.app.action.PROVISION_MANAGED_DEVICE , prior to allowing accounts to be added in the new secondary User, so users understand that the device is managed.

3.9.4. Device Policy Management Role Requirements

If device implementations report android.software.device_admin or android.software.managed_users , then they:

  • [C-1-1] MUST support the device policy management role as defined in section 9.1 . The application that holds the device policy management role MAY be defined by setting config_devicePolicyManagement to the package name. The package name MUST be followed by : and the signing certificate unless the application is preloaded.

If a package name is not defined for config_devicePolicyManagement as described above:

If a package name is defined for config_devicePolicyManagement as described above:

  • [C-3-1] The application MUST be installed on all profiles for a user .
  • [C-3-2] Device implementations MAY define an application that updates the device policy management role holder before provisioning by setting config_devicePolicyManagementUpdater .

If a package name is defined for config_devicePolicyManagementUpdater as described above:

  • [C-4-1] The application MUST be preinstalled on the device.
  • [C-4-2] The application MUST implement an intent filter which resolves android.app.action.UPDATE_DEVICE_POLICY_MANAGEMENT_ROLE_HOLDER .

3.9.5. Device Policy Resolution Framework

If device implementations report android.software.device_admin or android.software.managed_users , then they:

3.10. دسترسی

Android provides an accessibility layer that helps users with disabilities to navigate their devices more easily. In addition, Android provides platform APIs that enable accessibility service implementations to receive callbacks for user and system events and generate alternate feedback mechanisms, such as text-to-speech, haptic feedback, and trackball/d-pad navigation.

If device implementations support third-party accessibility services, they:

  • [C-1-1] MUST provide an implementation of the Android accessibility framework as described in the accessibility APIs SDK documentation.
  • [C-1-2] MUST generate accessibility events and deliver the appropriate AccessibilityEvent to all registered AccessibilityService implementations as documented in the SDK.
  • [C-1-4] MUST provide a user affordance to control accessibility services that declare the AccessibilityServiceInfo.FLAG_REQUEST_ACCESSIBILITY_BUTTON . Note that for device implementations with a system navigation bar, they SHOULD allow the user to have the option for a button in the system's navigation bar to control these services.

If device implementations include preinstalled accessibility services, they:

  • [C-2-1] MUST implement these preinstalled accessibility services as Direct Boot Aware apps when the data storage is encrypted with File Based Encryption (FBE).
  • SHOULD provide a mechanism in the out-of-box setup flow for users to enable relevant accessibility services, as well as options to adjust the font size, display size and magnification gestures.

3.11. تبدیل متن به گفتار

Android includes APIs that allow applications to make use of text-to-speech (TTS) services and allows service providers to provide implementations of TTS services.

If device implementations reporting the feature android.hardware.audio.output, they:

If device implementations support installation of third-party TTS engines, they:

  • [C-2-1] MUST provide user affordance to allow the user to select a TTS engine for use at system level.

Start of new requirements for Android 15

3.12. چارچوب ورودی تلویزیون

The Android Television Input Framework (TIF) simplifies the delivery of live content to Android Television devices. TIF provides a standard API to create input modules that control Android Television devices.

If device implementations support TIF, they:

  • [C-1-1] MUST declare the platform feature android.software.live_tv .
  • [C-1-2] MUST support all TIF APIs such that an application which uses these APIs and the third-party TIF-based inputs service can be installed and used on the device.

End of new requirements

3.13. تنظیمات سریع

Android provides a Quick Settings UI component that allows quick access to frequently used or urgently needed actions.

If device implementations include a Quick Settings UI component and support third-party Quick Settings, they:

  • [C-1-1] MUST allow the user to add or remove the tiles provided through the quicksettings APIs from a third-party app.
  • [C-1-2] MUST NOT automatically add a tile from a third-party app directly to the Quick Settings.
  • [C-1-3] MUST display all the user-added tiles from third-party apps alongside the system-provided quick setting tiles.

3.14. Media UI

If device implementations include non-voice-activated applications (the Apps) that interact with third-party applications through MediaBrowser or MediaSession , the Apps:

  • [C-1-2] MUST clearly display icons obtained via getIconBitmap() or getIconUri() and titles obtained via getTitle() as described in MediaDescription . May shorten titles to comply with safety regulations (eg driver distraction).

  • [C-1-3] MUST show the third-party application icon whenever displaying content provided by this third-party application.

  • [C-1-4] MUST allow the user to interact with the entire MediaBrowser hierarchy. MAY restrict the access to part of the hierarchy to comply with safety regulations (eg driver distraction), but MUST NOT give preferential treatment based on content or content provider.

  • [C-1-5] MUST consider double tap of KEYCODE_HEADSETHOOK or KEYCODE_MEDIA_PLAY_PAUSE as KEYCODE_MEDIA_NEXT for MediaSession.Callback#onMediaButtonEvent .

3.15. برنامه های فوری

If device implementations support Instant Apps, they MUST satisfy the following requirements:

  • [C-1-1] Instant Apps MUST only be granted permissions that have the android:protectionLevel set to "instant" .
  • [C-1-2] Instant Apps MUST NOT interact with installed apps via implicit intents unless one of the following is true:
    • The component's intent pattern filter is exposed and has CATEGORY_BROWSABLE
    • The action is one of ACTION_SEND, ACTION_SENDTO, ACTION_SEND_MULTIPLE
    • The target is explicitly exposed with android:visibleToInstantApps
  • [C-1-3] Instant Apps MUST NOT interact explicitly with installed apps unless the component is exposed via android:visibleToInstantApps.
  • [C-1-4] Installed Apps MUST NOT see details about Instant Apps on the device unless the Instant App explicitly connects to the installed application.
  • Device implementations MUST provide the following user affordances for interacting with Instant Apps. The AOSP meets the requirements with the default System UI, Settings, and Launcher. پیاده سازی دستگاه:

    • [C-1-5] MUST provide a user affordance to view and delete Instant Apps locally cached for each individual app package.
    • [C-1-6] MUST provide a persistent user notification that can be collapsed while an Instant App is running in the foreground. This user notification MUST include that Instant Apps do not require installation and provide a user affordance that directs the user to the application info screen in Settings. For Instant Apps launched via web intents, as defined by using an intent with action set to Intent.ACTION_VIEW and with a scheme of "http" or "https", an additional user affordance SHOULD allow the user not to launch the Instant App and launch the associated link with the configured web browser, if a browser is available on the device.
    • [C-1-7] MUST allow running Instant Apps to be accessed from the Recents function if the Recents function is available on the device.
  • [C-1-8] MUST preload one or more applications or service components with an intent handler for the intents listed in the SDK here and make the intents visible for Instant Apps.

3.16. Companion Device Pairing

Android includes support for companion device pairing to more effectively manage association with companion devices and provides the CompanionDeviceManager API for apps to access this feature.

If device implementations support the companion device pairing feature, they:

Start of new requirements for Android 15

  • [C-1-3] MUST provide user affordances for the user to select/confirm a companion device is present and operational , which MUST use the same message as implemented in AOSP without addition or modification .

End of new requirements

3.17. Heavyweight Apps

If device implementations declare the feature FEATURE_CANT_SAVE_STATE , then they:

  • [C-1-1] MUST have only one installed app that specifies cantSaveState running in the system at a time. If the user leaves such an app without explicitly exiting it (for example by pressing home while leaving an active activity the system, instead of pressing back with no remaining active activities in the system), then device implementations MUST prioritize that app in RAM as they do for other things that are expected to remain running, such as foreground services. While such an app is in the background, the system can still apply power management features to it, such as limiting CPU and network access.
  • [C-1-2] MUST provide a UI affordance to chose the app that won't participate in the normal state save/restore mechanism once the user launches a second app declared with cantSaveState attribute.
  • [C-1-3] MUST NOT apply other changes in policy to apps that specify cantSaveState , such as changing CPU performance or changing scheduling prioritization.

If device implementations don't declare the feature FEATURE_CANT_SAVE_STATE , then they:

  • [C-1-1] MUST ignore the cantSaveState attribute set by apps and MUST NOT change the app behavior based on that attribute.

3.18. مخاطبین

Android includes Contacts Provider APIs to allow applications to manage contact information stored on the device. Contact data that is entered directly into the device is typically synchronized with a web service, but the data MAY also only reside locally on the device. Contacts that are only stored on the device are referred to as local contacts.

RawContacts are "associated with" or "stored in" an Account when the ACCOUNT_NAME , and ACCOUNT_TYPE , columns for the raw contacts match the corresponding Account.name and Account.type fields of the account.

Default local account : an account for raw contacts that are only stored on the device and not associated with an Account in the AccountManager , which are created with null values for the ACCOUNT_NAME , and ACCOUNT_TYPE , columns.

Custom local account : an account for raw contacts that are only stored on the device and not associated with an Account in the AccountManager, which are created with at least one non-null value for the ACCOUNT_NAME , and ACCOUNT_TYPE , columns.

پیاده سازی دستگاه:

  • [C-SR-1] Are STRONGLY RECOMMENDED to not create custom local accounts .

If device implementations use a custom local account :

  • [C-1-1] The ACCOUNT_NAME , of the custom local account MUST be returned by ContactsContract.RawContacts.getLocalAccountName
  • [C-1-2] The ACCOUNT_TYPE , of the custom local account MUST be returned by ContactsContract.RawContacts.getLocalAccountType
  • [C-1-3] Raw contacts that are inserted by third party applications with the default local account (ie by setting null values for ACCOUNT_NAME and ACCOUNT_TYPE ) MUST be inserted to the custom local account .
  • [C-1-4] Raw contacts inserted into the custom local account MUST not be removed when accounts are added or removed.
  • [C-1-5] Delete operations performed against the custom local account MUST result in raw contacts being purged immediately (as if the CALLER_IS_SYNCADAPTER param was set to true), even if the CALLER\_IS\_SYNCADAPTER param was set to false or not مشخص شده است.

Start of new requirements for Android 15

3.19. تنظیمات زبان

پیاده سازی دستگاه:

  • [C-0-1] MUST NOT provide any user affordance to select gender-specific language treatment for languages that do not support gender specific translations. See grammatical resources for more information.

End of new requirements

4. Application Packaging Compatibility

Devices implementations:

  • [C-0-1] MUST be capable of installing and running Android ".apk" files as generated by the "aapt" tool included in the official Android SDK .

    • As the above requirement may be challenging, device implementations are RECOMMENDED to use the AOSP reference implementation's package management system.
  • [C-0-2] MUST support verifying ".apk" files using the APK Signature Scheme v3.1, APK Signature Scheme v3 , APK Signature Scheme v2 and JAR signing .

  • [C-0-3] MUST NOT extend either the .apk , Android Manifest , Dalvik bytecode , or RenderScript bytecode formats in such a way that would prevent those files from installing and running correctly on other compatible devices.

  • [C-0-4] MUST NOT allow apps other than the current "installer of record" for the package to silently uninstall the app without any user confirmation, as documented in the SDK for the DELETE_PACKAGE permission. The only exceptions are the system package verifier app handling PACKAGE_NEEDS_VERIFICATION intent and the storage manager app handling ACTION_MANAGE_STORAGE intent.

  • [C-0-5] MUST have an activity that handles the android.settings.MANAGE_UNKNOWN_APP_SOURCES intent.

  • [C-0-6] MUST NOT install application packages from unknown sources, unless the app that requests the installation meets all the following requirements:

    • It MUST declare the REQUEST_INSTALL_PACKAGES permission or have the android:targetSdkVersion set at 24 or lower.
    • It MUST have been granted permission by the user to install apps from unknown sources.
  • SHOULD provide a user affordance to grant/revoke the permission to install apps from unknown sources per application, but MAY choose to implement this as a no-op and return RESULT_CANCELED for startActivityForResult() , if the device implementation does not want to allow users to have this choice. However, even in such cases, they SHOULD indicate to the user why there is no such choice presented.

  • [C-0-7] MUST display a warning dialog with the warning string that is provided through the system API PackageManager.setHarmfulAppWarning to the user before launching an activity in an application that has been marked by the same system API PackageManager.setHarmfulAppWarning as potentially مضر

  • SHOULD provide a user affordance to choose to uninstall or launch an application on the warning dialog.

  • [C-0-8] MUST implement support for Incremental File System as documented here .

  • [C-0-9] MUST support verifying .apk files using the APK Signature Scheme v4 and APK Signature Scheme v4.1.

5. Multimedia Compatibility

پیاده سازی دستگاه:

  • [C-0-1] MUST support the media formats, encoders, decoders, file types, and container formats defined in section 5.1 for each and every codec declared by MediaCodecList .
  • [C-0-2] MUST declare and report support of the encoders, decoders available to third-party applications via MediaCodecList .
  • [C-0-3] MUST be able to properly decode and make available to third-party apps all the formats it can encode. This includes all bitstreams that its encoders generate and the profiles reported in its CamcorderProfile .

پیاده سازی دستگاه:

  • SHOULD aim for minimum codec latency, in others words, they
    • SHOULD NOT consume and store input buffers and return input buffers only once processed.
    • SHOULD NOT hold onto decoded buffers for longer than as specified by the standard (eg SPS).
    • SHOULD NOT hold onto encoded buffers longer than required by the GOP structure.

All of the codecs listed in the section below are provided as software implementations in the preferred Android implementation from the Android Open Source Project.

Please note that neither Google nor the Open Handset Alliance make any representation that these codecs are free from third-party patents. Those intending to use this source code in hardware or software products are advised that implementations of this code, including in open source software or shareware, may require patent licenses from the relevant patent holders.

5.1. کدک های رسانه ای

5.1.1. رمزگذاری صدا

See more details in 5.1.3. Audio Codecs Details .

If device implementations declare android.hardware.microphone , they MUST support encoding the following audio formats and make them available to third-party apps:

  • [C-1-1] PCM/WAVE
  • [C-1-2] FLAC
  • [C-1-3] Opus

All audio encoders MUST support:

5.1.2. Audio Decoding

See more details in 5.1.3. Audio Codecs Details .

If device implementations declare support for the android.hardware.audio.output feature, they must support decoding the following audio formats:

  • [C-1-1] MPEG-4 AAC Profile (AAC LC)
  • [C-1-2] MPEG-4 HE AAC Profile (AAC+)
  • [C-1-3] MPEG-4 HE AACv2 Profile (enhanced AAC+)
  • [C-1-4] AAC ELD (enhanced low delay AAC)
  • [C-1-11] xHE-AAC (ISO/IEC 23003-3 Extended HE AAC Profile, which includes the USAC Baseline Profile, and ISO/IEC 23003-4 Dynamic Range Control Profile)
  • [C-1-5] FLAC
  • [C-1-6] MP3
  • [C-1-7] MIDI
  • [C-1-8] Vorbis
  • [C-1-9] PCM/WAVE including high-resolution audio formats up to 24 bits, 192 kHz sample rate, and 8 channels. Note that this requirement is for decoding only, and that a device is permitted to downsample and downmix during the playback phase.
  • [C-1-10] Opus

If device implementations support the decoding of AAC input buffers of multichannel streams (ie more than two channels) to PCM through the default AAC audio decoder in the android.media.MediaCodec API, the following MUST be supported:

  • [C-2-1] Decoding MUST be performed without downmixing (eg a 5.0 AAC stream must be decoded to five channels of PCM, a 5.1 AAC stream must be decoded to six channels of PCM).
  • [C-2-2] Dynamic range metadata MUST be as defined in "Dynamic Range Control (DRC)" in ISO/IEC 14496-3, and the android.media.MediaFormat DRC keys to configure the dynamic range-related behaviors of the audio decoder. The AAC DRC keys were introduced in API 21, and are: KEY_AAC_DRC_ATTENUATION_FACTOR , KEY_AAC_DRC_BOOST_FACTOR , KEY_AAC_DRC_HEAVY_COMPRESSION , KEY_AAC_DRC_TARGET_REFERENCE_LEVEL and KEY_AAC_ENCODED_TARGET_LEVEL .
  • [C-SR-1] It is STRONGLY RECOMMENDED that requirements C-2-1 and C-2-2 above are satisfied by all AAC audio decoders.

When decoding USAC audio, MPEG-D (ISO/IEC 23003-4):

  • [C-3-1] Loudness and DRC metadata MUST be interpreted and applied according to MPEG-D DRC Dynamic Range Control Profile Level 1.
  • [C-3-2] The decoder MUST behave according to the configuration set with the following android.media.MediaFormat keys: KEY_AAC_DRC_TARGET_REFERENCE_LEVEL and KEY_AAC_DRC_EFFECT_TYPE .

MPEG-4 AAC, HE AAC, and HE AACv2 profile decoders:

  • MAY support loudness and dynamic range control using ISO/IEC 23003-4 Dynamic Range Control Profile.

If ISO/IEC 23003-4 is supported and if both ISO/IEC 23003-4 and ISO/IEC 14496-3 metadata are present in a decoded bitstream, then:

  • ISO/IEC 23003-4 metadata SHALL take precedence.

All audio decoders MUST support outputting:

If device implementations support the decoding of AAC input buffers of multichannel streams (ie more than two channels) to PCM through the default AAC audio decoder in the android.media.MediaCodec API, then the following MUST be supported:

  • [C-7-1] MUST be able to be configured by the application using the decoding with the key KEY_MAX_OUTPUT_CHANNEL_COUNT to control whether the content is downmixed to stereo (when using a value of 2) or is output using the native number of channels (when using a value equal or greater to that number). For instance a value of 6 or greater would configure a decoder to output 6 channels when fed 5.1 content.
  • [C-7-2] When decoding, the decoder MUST advertise the channel mask being used on the output format with the KEY_CHANNEL_MASK key, using the android.media.AudioFormat constants (example: CHANNEL_OUT_5POINT1 ).

If device implementations support audio decoders other than the default AAC audio decoder and are capable of outputting multi-channel audio (ie more than 2 channels) when fed compressed multi-channel content, then:

  • [C-SR-2] The decoder is STRONGLY RECOMMENDED to be able to be configured by the application using the decoding with the key KEY_MAX_OUTPUT_CHANNEL_COUNT to control whether the content is downmixed to stereo (when using a value of 2) or is output using the native number of channels (when using a value equal or greater to that number). For instance a value of 6 or greater would configure a decoder to output 6 channels when fed 5.1 content.
  • [C-SR-3] When decoding, the decoder is STRONGLY RECOMMENDED to advertise the channel mask being used on the output format with the KEY_CHANNEL_MASK key, using the android.media.AudioFormat constants (example: CHANNEL_OUT_5POINT1 ).

5.1.3. Audio Codecs Details

Format/Codec جزئیات File Types/Container Formats to be supported
MPEG-4 AAC Profile
(AAC LC)
Support for mono/stereo/5.0/5.1 content with standard sampling rates from 8 to 48 kHz.
  • 3GPP (.3gp)
  • MPEG-4 (.mp4, .m4a)
  • ADTS raw AAC (.aac, ADIF not supported)
  • MPEG-TS (.ts, not seekable, decode only)
  • Matroska (.mkv, decode only)
MPEG-4 HE AAC Profile (AAC+) Support for mono/stereo/5.0/5.1 content with standard sampling rates from 16 to 48 kHz.
  • 3GPP (.3gp)
  • MPEG-4 (.mp4, .m4a)
MPEG-4 HE AACv2
Profile (enhanced AAC+)
Support for mono/stereo/5.0/5.1 content with standard sampling rates from 16 to 48 kHz.
  • 3GPP (.3gp)
  • MPEG-4 (.mp4, .m4a)
AAC ELD (enhanced low delay AAC) Support for mono/stereo content with standard sampling rates from 16 to 48 kHz.
  • 3GPP (.3gp)
  • MPEG-4 (.mp4, .m4a)
USAC Support for mono/stereo content with standard sampling rates from 7.35 to 48 kHz. MPEG-4 (.mp4, .m4a)
AMR-NB 4.75 to 12.2 kbps sampled @ 8 kHz 3GPP (.3gp)
AMR-WB 9 rates from 6.60 kbit/s to 23.85 kbit/s sampled @ 16 kHz, as defined at AMR-WB, Adaptive Multi-Rate - Wideband Speech Codec 3GPP (.3gp)
FLAC For both encoder and decoder: at least Mono and Stereo modes MUST be supported. Sample rates up to 192 kHz MUST be supported; 16-bit and 24-bit resolution MUST be supported. FLAC 24-bit audio data handling MUST be available with floating point audio configuration.
  • FLAC (.flac)
  • MPEG-4 (.mp4, .m4a, decode only)
  • Matroska (.mkv, decode only)
MP3 Mono/Stereo 8-320Kbps constant (CBR) or variable bitrate (VBR)
  • MP3 (mp3.)
  • MPEG-4 (.mp4, .m4a, decode only)
  • Matroska (.mkv, decode only)
MIDI MIDI Type 0 and 1. DLS Version 1 and 2. XMF and Mobile XMF. Support for ringtone formats RTTTL/RTX, OTA, and iMelody
  • Type 0 and 1 (.mid, .xmf, .mxmf)
  • RTTTL/RTX (.rtttl, .rtx)
  • iMelody (.imy)
وربیس Decoding: Support for mono, stereo, 5.0 and 5.1 content with sampling rates of 8000, 12000, 16000, 24000, and 48000 Hz.
Encoding: Support for mono and stereo content with sampling rates of 8000, 12000, 16000, 24000, and 48000 Hz.
  • Ogg (.ogg)
  • MPEG-4 (.mp4, .m4a, decode only)
  • Matroska (.mkv)
  • Webm (.webm)
PCM/WAVE PCM codec MUST support 16-bit linear PCM and 16-bit float. WAVE extractor must support 16-bit, 24-bit, 32-bit linear PCM and 32-bit float (rates up to limit of hardware). Sampling rates MUST be supported from 8 kHz to 192 kHz. WAVE (.wav)
اپوس Decoding: Support for mono, stereo, 5.0 and 5.1 content with sampling rates of 8000, 12000, 16000, 24000, and 48000 Hz.
Encoding: Support for mono and stereo content with sampling rates of 8000, 12000, 16000, 24000, and 48000 Hz.
  • Ogg (.ogg)
  • MPEG-4 (.mp4, .m4a, decode only)
  • Matroska (.mkv)
  • Webm (.webm)

5.1.4. Image Encoding

See more details in 5.1.6. Image Codecs Details .

Device implementations MUST support encoding the following image encoding:

  • [C-0-1] JPEG
  • [C-0-2] PNG
  • [C-0-3] WebP
  • [C-0-4] AVIF
    • Devices must support BITRATE_MODE_CQ and Baseline Profile.

If device implementations support HEIC encoding via android.media.MediaCodec for media type MIMETYPE_IMAGE_ANDROID_HEIC , they:

5.1.5. Image Decoding

See more details in 5.1.6. Image Codecs Details .

Device implementations MUST support decoding the following image encoding:

  • [C-0-1] JPEG
  • [C-0-2] GIF
  • [C-0-3] PNG
  • [C-0-4] BMP
  • [C-0-5] WebP
  • [C-0-6] Raw
  • [C-0-7] AVIF (Baseline Profile)

If device implementations support HEVC video decoding, they:

  • [C-1-1] MUST support HEIF (HEIC) image decoding.

Image decoders that support a high bit-depth format (9+ bits per channel):

  • [C-2-1] MUST support outputting an 8-bit equivalent format if requested by the application, for example, via the ARGB_8888 config of android.graphics.Bitmap .

5.1.6. Image Codecs Details

Format/Codec جزئیات Supported File Types/Container Formats
JPEG Base+progressive JPEG (.jpg)
GIF GIF (.gif)
PNG PNG (png.)
BMP BMP (.bmp)
WebP WebP (.webp)
خام ARW (.arw), CR2 (.cr2), DNG (.dng), NEF (.nef), NRW (.nrw), ORF (.orf), PEF (.pef), RAF (.raf), RW2 (.rw2), SRW (.srw)
HEIF Image, Image collection, Image sequence HEIF (.heif), HEIC (.heic)
AVIF (Baseline Profile) Image, Image collection, Image sequence Baseline Profile HEIF container (.avif)

Image encoder and decoders exposed through the MediaCodec API

  • [C-1-1] MUST support YUV420 8:8:8 flexible color format ( COLOR_FormatYUV420Flexible ) through CodecCapabilities .

  • [C-SR-1] STRONGLY RECOMMENDED to support RGB888 color format for input Surface mode.

  • [C-1-3] MUST support at least one of a planar or semiplanar YUV420 8:8:8 color format: COLOR_FormatYUV420PackedPlanar (equivalent to COLOR_FormatYUV420Planar ) or COLOR_FormatYUV420PackedSemiPlanar (equivalent to COLOR_FormatYUV420SemiPlanar ). They are STRONGLY RECOMMENDED to support both.

5.1.7. کدک های ویدیویی

  • For acceptable quality of web video streaming and video-conference services, device implementations SHOULD use a hardware VP8 codec that meets the requirements .

If device implementations include a video decoder or encoder:

  • [C-1-1] Video codecs MUST support output and input bytebuffer sizes that accommodate the largest feasible compressed and uncompressed frame as dictated by the standard and configuration but also not overallocate.

  • [C-1-2] Video encoders and decoders MUST support YUV420 8:8:8 flexible color formats ( COLOR_FormatYUV420Flexible ) through CodecCapabilities .

  • [C-1-3] Video encoders and decoders MUST support at least one of a planar or semiplanar YUV420 8:8:8 color format: COLOR_FormatYUV420PackedPlanar (equivalent to COLOR_FormatYUV420Planar ) or COLOR_FormatYUV420PackedSemiPlanar (equivalent to COLOR_FormatYUV420SemiPlanar ). They are STRONGLY RECOMMENDED to support both.

  • [C-SR-1] Video encoders and decoders are STRONGLY RECOMMENDED to support at least one of a hardware optimized planar or semiplanar YUV420 8:8:8 color format (YV12, NV12, NV21 or equivalent vendor optimized format.)

  • [C-1-5] Video decoders that support a high bit-depth format (9+ bits per channel) MUST support outputting an 8-bit equivalent format if requested by the application. This MUST be reflected by supporting an YUV420 8:8:8 color format via android.media.MediaCodecInfo .

If device implementations advertise HDR profile support through Display.HdrCapabilities , they:

  • [C-2-1] MUST support HDR static metadata parsing and handling.

If device implementations advertise intra refresh support through FEATURE_IntraRefresh in the MediaCodecInfo.CodecCapabilities class, they:

  • [C-3-1] MUST support the refresh periods in the range of 10 - 60 frames and accurately operate within 20% of configured refresh period.

Unless the application specifies otherwise using the KEY_COLOR_FORMAT format key, video decoder implementations:

  • [C-4-1] MUST default to the color format optimized for hardware display if configured using Surface output.
  • [C-4-2] MUST default to a YUV420 8:8:8 color format optimized for CPU reading if configured to not use Surface output.

5.1.8. Video Codecs List

Format/Codec جزئیات File Types/Container Formats to be supported
H.263
  • 3GPP (.3gp)
  • MPEG-4 (.mp4)
  • Matroska (.mkv, decode only)
H.264 AVC See section 5.2 and 5.3 for details
  • 3GPP (.3gp)
  • MPEG-4 (.mp4)
  • MPEG-2 TS (.ts, not seekable)
  • Matroska (.mkv, decode only)
H.265 HEVC See section 5.3 for details
  • MPEG-4 (.mp4)
  • Matroska (.mkv, decode only)
MPEG-2 Main Profile
  • MPEG2-TS (.ts, not seekable)
  • MPEG-4 (.mp4, decode only)
  • Matroska (.mkv, decode only)
MPEG-4 SP
  • 3GPP (.3gp)
  • MPEG-4 (.mp4)
  • Matroska (.mkv, decode only)
VP8 See section 5.2 and 5.3 for details
VP9 See section 5.3 for details
AV1 See section 5.2 and section 5.3 for details
  • MPEG-4 (.mp4)
  • Matroska (.mkv, decode only)

5.1.9. Media Codec Security

Device implementations MUST ensure compliance with media codec security features as described below.

Android includes support for OMX, a cross-platform multimedia acceleration API, as well as Codec 2.0, a low-overhead multimedia acceleration API.

If device implementations support multimedia, they:

  • [C-1-1] MUST provide support for media codecs either via OMX or Codec 2.0 APIs (or both) as in the Android Open Source Project and not disable or circumvent the security protections. This specifically does not mean that every codec MUST use either the OMX or Codec 2.0 API, only that support for at least one of these APIs MUST be available, and support for the available APIs MUST include the security protections present.
  • [C-SR-1] Are STRONGLY RECOMMENDED to include support for Codec 2.0 API.

If device implementations do not support the Codec 2.0 API, they:

  • [C-2-1] MUST include the corresponding OMX software codec from the Android Open Source Project (if it is available) for each media format and type (encoder or decoder) supported by the device.
  • [C-2-2] Codecs that have names starting with "OMX.google." MUST be based on their Android Open Source Project source code.
  • [C-SR-2] Are STRONGLY RECOMMENDED that the OMX software codecs run in a codec process that does not have access to hardware drivers other than memory mappers.

If device implementations support Codec 2.0 API, they:

  • [C-3-1] MUST include the corresponding Codec 2.0 software codec from the Android Open Source Project (if it is available) for each media format and type (encoder or decoder) supported by the device.
  • [C-3-2] MUST house the Codec 2.0 software codecs in the software codec process as provided in the Android Open Source Project to make it possible to more narrowly grant access to software codecs.
  • [C-3-3] Codecs that have names starting with "c2.android." MUST be based on their Android Open Source Project source code.

5.1.10. Media Codec Characterization

If device implementations support media codecs, they:

  • [C-1-1] MUST return correct values of media codec characterization via the MediaCodecInfo API.

به طور خاص:

  • [C-1-2] Codecs with names starting with "OMX." MUST use the OMX APIs and have names that conform to OMX IL naming guidelines.
  • [C-1-3] Codecs with names starting with "c2." MUST use the Codec 2.0 API and have names that conform to Codec 2.0 naming guidelines for Android.
  • [C-1-4] Codecs with names starting with "OMX.google." or "c2.android." MUST NOT be characterized as vendor or as hardware-accelerated.
  • [C-1-5] Codecs that run in a codec process (vendor or system) that have access to hardware drivers other than memory allocators and mappers MUST NOT be characterized as software-only.
  • [C-1-6] Codecs not present in the Android Open Source Project or not based on the source code in that project MUST be characterized as vendor.
  • [C-1-7] Codecs that utilize hardware acceleration MUST be characterized as hardware accelerated.
  • [C-1-8] Codec names MUST NOT be misleading. For example, codecs named "decoders" MUST support decoding, and those named "encoders" MUST support encoding. Codecs with names containing media formats MUST support those formats.

If device implementations support video codecs:

  • [C-2-1] All video codecs MUST publish achievable frame rate data for the following sizes if supported by the codec:
SD (low quality) SD (high quality) HD 720p HD 1080p UHD
وضوح تصویر
  • 176 x 144 px (H263, MPEG2, MPEG4)
  • 352 x 288 px (MPEG4 encoder, H263, MPEG2)
  • 320 x 180 px (VP8, VP8)
  • 320 x 240 px (other)
  • 704 x 576 px (H263)
  • 640 x 360 px (VP8, VP9)
  • 640 x 480 px (MPEG4 encoder)
  • 720 x 480 px (other, AV1)
  • 1408 x 1152 px (H263)
  • 1280 x 720 px (other, AV1)
1920 x 1080 px (other than MPEG4, AV1) 3840 x 2160 px (HEVC, VP9, AV1)
  • [C-2-2] Video codecs that are characterized as hardware accelerated MUST publish performance points information. They MUST each list all supported standard performance points (listed in PerformancePoint API), unless they are covered by another supported standard performance point.
  • Additionally they SHOULD publish extended performance points if they support sustained video performance other than one of the standard ones listed.

5.2. رمزگذاری ویدیو

If device implementations support any video encoder and make it available to third-party apps, and set the
MediaFormat.KEY_BITRATE_MODE to BITRATE_MODE_VBR so that the encoder operates in Variable bitrate mode, then, as long as it does not impact the minimum quality floor , the encoded bitrate :

  • SHOULD NOT be, over one sliding window, more than 15% over the bitrate between intraframe (I-frame) intervals.
  • SHOULD NOT be more than 100% over the bitrate over a sliding window of 1 second.

If device implementations support any video encoder and make it available to third-party apps and set the MediaFormat.KEY_BITRATE_MODE to BITRATE_MODE_CBR so the encoder operates in constant bitrate mode, then the encoded bitrate:

  • [C-SR-2] is STRONGLY RECOMMENDED to NOT be more than 15% over the target bitrate over a sliding window of 1 second.

If device implementations include an embedded screen display with the diagonal length of at least 2.5 inches or include a video output port or declare the support of a camera via the android.hardware.camera.any feature flag, they:

  • [C-1-1] MUST include the support of at least one of the VP8 or H.264 video encoders, and make it available for third-party applications.
  • SHOULD support both VP8 and H.264 video encoders, and make it available for third-party applications.

If device implementations support any of the H.264, VP8, VP9 or HEVC video encoders and make it available to third-party applications, they:

  • [C-2-1] MUST support dynamically configurable bitrates.
  • SHOULD support variable frame rates, where video encoder SHOULD determine instantaneous frame duration based on the timestamps of input buffers, and allocate its bit bucket based on that frame duration.

If device implementations support the MPEG-4 SP video encoder and make it available to third-party apps, they:

  • SHOULD support dynamically configurable bitrates for the supported encoder.

If device implementations provide hardware accelerated video or image encoders, and support one or more attached or pluggable hardware camera(s) exposed through the android.camera APIs:

  • [C-4-1] all hardware accelerated video and image encoders MUST support encoding frames from the hardware camera(s).
  • SHOULD support encoding frames from the hardware camera(s) through all video or image encoders.

If device implementations provide HDR encoding, they:

  • [C-SR-1] are STRONGLY RECOMMENDED to provide a plugin for the seamless transcoding API to convert from HDR format to SDR format.

5.2.1. H.263

If device implementations support H.263 encoders and make it available to third-party apps, they:

  • [C-1-1] MUST support QCIF resolution (176 x 144) using Baseline Profile Level 45. SQCIF resolution is optional.

5.2.2. H.264

If device implementations support H.264 codec, they:

  • [C-1-1] MUST support Baseline Profile Level 3. However, support for ASO (Arbitrary Slice Ordering), FMO (Flexible Macroblock Ordering) and RS (Redundant Slices) is OPTIONAL. Moreover, to maintain compatibility with other Android devices, it is RECOMMENDED that ASO, FMO and RS are not used for Baseline Profile by encoders.
  • [C-1-2] MUST support the SD (Standard Definition) video encoding profiles in the following table.
  • SHOULD support Main Profile Level 4.
  • SHOULD support the HD (High Definition) video encoding profiles as indicated in the following table.

If device implementations report support of H.264 encoding for 720p or 1080p resolution videos through the media APIs, they:

  • [C-2-1] MUST support the encoding profiles in the following table.
SD (Low quality) SD (High quality) HD 720p HD 1080p
وضوح تصویر 320 x 240 px 720 x 480 px 1280 x 720 پیکسل 1920 x 1080 پیکسل
Video frame rate 20 فریم بر ثانیه 30 فریم بر ثانیه 30 فریم بر ثانیه 30 فریم بر ثانیه
Video bitrate 384 Kbps 2 مگابیت بر ثانیه 4 Mbps 10 مگابیت بر ثانیه

5.2.3. VP8

If device implementations support VP8 codec, they:

  • [C-1-1] MUST support the SD video encoding profiles.
  • SHOULD support the following HD (High Definition) video encoding profiles.
  • [C-1-2] MUST support writing Matroska WebM files.
  • SHOULD provide a hardware VP8 codec that meets the WebM project RTC hardware coding requirements , to ensure acceptable quality of web video streaming and video-conference services.

If device implementations report support of VP8 encoding for 720p or 1080p resolution videos through the media APIs, they:

  • [C-2-1] MUST support the encoding profiles in the following table.
SD (Low quality) SD (High quality) HD 720p HD 1080p
وضوح تصویر 320 x 180 px 640 x 360 px 1280 x 720 پیکسل 1920 x 1080 پیکسل
Video frame rate 30 فریم بر ثانیه 30 فریم بر ثانیه 30 فریم بر ثانیه 30 فریم بر ثانیه
Video bitrate 800 Kbps 2 مگابیت بر ثانیه 4 Mbps 10 مگابیت بر ثانیه

5.2.4. VP9

If device implementations support VP9 codec, they:

  • [C-1-2] MUST support Profile 0 Level 3.
  • [C-1-1] MUST support writing Matroska WebM files.
  • [C-1-3] MUST generate CodecPrivate data.
  • SHOULD support the HD decoding profiles as indicated in the following table.
  • [C-SR-1] are STRONGLY RECOMMENDED to support the HD decoding profiles as indicated in the following table if there is a hardware encoder.
SD HD 720p HD 1080p UHD
وضوح تصویر 720 x 480 px 1280 x 720 پیکسل 1920 x 1080 پیکسل 3840 x 2160 پیکسل
Video frame rate 30 فریم بر ثانیه 30 فریم بر ثانیه 30 فریم بر ثانیه 30 فریم بر ثانیه
Video bitrate 1.6 Mbps 4 Mbps 5 مگابیت بر ثانیه 20 مگابیت بر ثانیه

If device implementations claim to support Profile 2 or Profile 3 through the Media APIs:

  • Support for 12-bit format is OPTIONAL.

5.2.5. H.265

If device implementations support H.265 codec, they:

  • [C-1-1] MUST support Main Profile Level 3 up to 512 x 512 resolution.
  • [C-SR-1] are STRONGLY RECOMMENDED to support the 720 x 480 SD profile and the HD encoding profiles as indicated in the following table if there is a hardware encoder.
SD HD 720p HD 1080p UHD
وضوح تصویر 720 x 480 px 1280 x 720 پیکسل 1920 x 1080 پیکسل 3840 x 2160 پیکسل
Video frame rate 30 فریم بر ثانیه 30 فریم بر ثانیه 30 فریم بر ثانیه 30 فریم بر ثانیه
Video bitrate 1.6 Mbps 4 Mbps 5 مگابیت بر ثانیه 20 مگابیت بر ثانیه

5.2.6. AV1

If device implementations support AV1 codec then, they:

  • [C-1-1] MUST support Main Profile including 8-bit and 10-bit content.
  • [C-1-2] MUST publish performance data ie report performance data via the getSupportedFrameRatesFor() or getSupportedPerformancePoints() APIs for supported resolutions in the table below.

  • [C-1-3] MUST accept HDR metadata and output it to the bitstream

If AV1 encoder is hardware accelerated, then it:

  • [C-2-1] MUST support up to and including HD1080p encoding profile from the table below:
SD HD 720p HD 1080p UHD
وضوح تصویر 720 x 480 px 1280 x 720 پیکسل 1920 x 1080 پیکسل 3840 x 2160 پیکسل
Video frame rate 30 فریم بر ثانیه 30 فریم بر ثانیه 30 فریم بر ثانیه 30 فریم بر ثانیه
Video bitrate 5 مگابیت بر ثانیه 8 Mbps 16 مگابیت بر ثانیه 50 مگابیت بر ثانیه

5.3. Video Decoding

If device implementations support VP8, VP9, H.264, or H.265 codecs, they:

  • [C-1-1] MUST support dynamic video resolution and frame rate switching through the standard Android APIs within the same stream for all VP8, VP9, H.264, and H.265 codecs in real time and up to the maximum resolution supported by each codec on the device.

5.3.1. MPEG-2

If device implementations support MPEG-2 decoders, they:

  • [C-1-1] MUST support the Main Profile High Level.

5.3.2. H.263

If device implementations support H.263 decoders, they:

  • [C-1-1] MUST support Baseline Profile Level 30 (CIF, QCIF and SQCIF resolutions @ 30fps 384kbps) and Level 45 (QCIF and SQCIF resolutions @ 30fps 128kbps).

5.3.3. MPEG-4

If device implementations with MPEG-4 decoders, they:

  • [C-1-1] MUST support Simple Profile Level 3.

5.3.4. H.264

If device implementations support H.264 decoders, they:

  • [C-1-1] MUST support Main Profile Level 3.1 and Baseline Profile. Support for ASO (Arbitrary Slice Ordering), FMO (Flexible Macroblock Ordering) and RS (Redundant Slices) is OPTIONAL.
  • [C-1-2] MUST be capable of decoding videos with the SD (Standard Definition) profiles listed in the following table and encoded with the Baseline Profile and Main Profile Level 3.1 (including 720p30).
  • SHOULD be capable of decoding videos with the HD (High Definition) profiles as indicated in the following table.

If the height that is reported by the Display.getSupportedModes() method is equal or greater than the video resolution, device implementations:

  • [C-2-1] MUST support the HD 720p video decoding profiles in the following table.
  • [C-2-2] MUST support the HD 1080p video decoding profiles in the following table.
SD (Low quality) SD (High quality) HD 720p HD 1080p
وضوح تصویر 320 x 240 px 720 x 480 px 1280 x 720 پیکسل 1920 x 1080 پیکسل
Video frame rate 30 فریم بر ثانیه 30 فریم بر ثانیه 60 فریم بر ثانیه 30 fps (60 fps Television )
Video bitrate 800 Kbps 2 مگابیت بر ثانیه 8 Mbps 20 مگابیت بر ثانیه

5.3.5. H.265 (HEVC)

If device implementations support H.265 codec, they:

  • [C-1-1] MUST support the Main Profile Level 3 Main tier and the SD video decoding profiles as indicated in the following table.
  • SHOULD support the HD decoding profiles as indicated in the following table.
  • [C-1-2] MUST support the HD decoding profiles as indicated in the following table if there is a hardware decoder.

If the height that is reported by the Display.getSupportedModes() method is equal to or greater than the video resolution, then:

  • [C-2-1] Device implementations MUST support at least one of H.265 or VP9 decoding of 720, 1080 and UHD profiles.
SD (Low quality) SD (High quality) HD 720p HD 1080p UHD
وضوح تصویر 352 x 288 پیکسل 720 x 480 px 1280 x 720 پیکسل 1920 x 1080 پیکسل 3840 x 2160 پیکسل
Video frame rate 30 فریم بر ثانیه 30 فریم بر ثانیه 30 فریم بر ثانیه 30/60 fps (60 fps Television with H.265 hardware decoding ) 60 فریم بر ثانیه
Video bitrate 600 Kbps 1.6 Mbps 4 Mbps 5 مگابیت بر ثانیه 20 مگابیت بر ثانیه

If device implementations claim to support an HDR Profile through the Media APIs:

  • [C-3-1] Device implementations MUST accept the required HDR metadata from the application, as well as support extracting and outputting the required HDR metadata from the bitstream and/or container.
  • [C-3-2] Device implementations MUST properly display HDR content on the device screen or on a standard video output port (eg, HDMI).

5.3.6. VP8

If device implementations support VP8 codec, they:

  • [C-1-1] MUST support the SD decoding profiles in the following table.
  • SHOULD use a hardware VP8 codec that meets the requirements .
  • SHOULD support the HD decoding profiles in the following table.

If the height as reported by the Display.getSupportedModes() method is equal or greater than the video resolution, then:

  • [C-2-1] Device implementations MUST support 720p profiles in the following table.
  • [C-2-2] Device implementations MUST support 1080p profiles in the following table.
SD (Low quality) SD (High quality) HD 720p HD 1080p
وضوح تصویر 320 x 180 px 640 x 360 px 1280 x 720 پیکسل 1920 x 1080 پیکسل
Video frame rate 30 فریم بر ثانیه 30 فریم بر ثانیه 30 fps (60 fps Television ) 30 (60 fps Television )
Video bitrate 800 Kbps 2 مگابیت بر ثانیه 8 Mbps 20 مگابیت بر ثانیه

5.3.7. VP9

If device implementations support VP9 codec, they:

  • [C-1-1] MUST support the SD video decoding profiles as indicated in the following table.
  • SHOULD support the HD decoding profiles as indicated in the following table.

If device implementations support VP9 codec and a hardware decoder:

  • [C-2-1] MUST support the HD decoding profiles as indicated in the following table.

If the height that is reported by the Display.getSupportedModes() method is equal to or greater than the video resolution, then:

  • [C-3-1] Device implementations MUST support at least one of VP9 or H.265 decoding of the 720, 1080 and UHD profiles.
SD (Low quality) SD (High quality) HD 720p HD 1080p UHD
وضوح تصویر 320 x 180 px 640 x 360 px 1280 x 720 پیکسل 1920 x 1080 پیکسل 3840 x 2160 پیکسل
Video frame rate 30 فریم بر ثانیه 30 فریم بر ثانیه 30 فریم بر ثانیه 30 fps (60 fps Television with VP9 hardware decoding ) 60 فریم بر ثانیه
Video bitrate 600 Kbps 1.6 Mbps 4 Mbps 5 مگابیت بر ثانیه 20 مگابیت بر ثانیه

If device implementations claim to support VP9Profile2 or VP9Profile3 through the 'CodecProfileLevel' media APIs:

  • Support for 12-bit format is OPTIONAL.

If device implementations claim to support an HDR Profile ( VP9Profile2HDR , VP9Profile2HDR10Plus , VP9Profile3HDR , VP9Profile3HDR10Plus ) through the media APIs:

  • [C-4-1] Device implementations MUST accept the required HDR metadata ( KEY_HDR_STATIC_INFO for all HDR profiles, as well as 'KEY_HDR10_PLUS_INFO' for HDR10Plus profiles) from the application. They also MUST support extracting and outputting the required HDR metadata from the bitstream and/or container.
  • [C-4-2] Device implementations MUST properly display HDR content on the device screen or on a standard video output port (eg, HDMI).

5.3.8. دالبی ویژن

If device implementations declare support for the Dolby Vision decoder through HDR_TYPE_DOLBY_VISION , they:

  • [C-1-1] MUST provide a Dolby Vision-capable extractor.

Start of new requirements for Android 15

  • [C-1-2] MUST properly display Dolby Vision content either on the device screen or on an external display attached via a standard video output port (eg, HDMI).

End of new requirements

  • [C-1-3] MUST set the track ID of backward-compatible base-layer(s) (if present) to be the same as the combined Dolby Vision layer's track ID.

5.3.9. AV1

If device implementations support AV1 codec and make it available to third-party applications, they:

  • [C-1-1] MUST support Main Profile including 8-bit and 10-bit content.

If device implementations provide support for AV1 codec with a hardware accelerated decoder then they:

  • [C-2-1] MUST be able to decode at least HD 720p video decoding profiles from the table below when the height reported by Display.getSupportedModes() method is equal or greater than 720p.
  • [C-2-2] MUST be able to decode at least HD 1080p video decoding profiles from the table below when the height reported by Display.getSupportedModes() method is equal or greater than 1080p.
SD HD 720p HD 1080p UHD
وضوح تصویر 720 x 480 px 1280 x 720 پیکسل 1920 x 1080 پیکسل 3840 x 2160 پیکسل
Video frame rate 30 فریم بر ثانیه 30 فریم بر ثانیه 30 فریم بر ثانیه 30 فریم بر ثانیه
Video bitrate 5 مگابیت بر ثانیه 8 Mbps 16 مگابیت بر ثانیه 50 مگابیت بر ثانیه

If device implementations support HDR Profile through the Media APIs, then they:

  • [C-3-1] MUST support extracting and outputting HDR metadata from the bitstream and/or container.
  • [C-3-2] MUST properly display HDR content on the device screen or on a standard video output port (for example, HDMI).

5.4. ضبط صدا

While some of the requirements outlined in this section are listed as SHOULD since Android 4.3, the Compatibility Definition for future versions are planned to change these to MUST. Existing and new Android devices are STRONGLY RECOMMENDED to meet these requirements that are listed as SHOULD, or they will not be able to attain Android compatibility when upgraded to the future version.

5.4.1. Raw Audio Capture and Microphone Information

If device implementations declare android.hardware.microphone , they:

  • [C-1-1] MUST allow capture of raw audio content for any AudioRecord or AAudio INPUT stream that is opened successfully. At a minimum, the following characteristics MUST be supported:

  • SHOULD allow capture of raw audio content with the following characteristics:

    • Format : Linear PCM, 16-bit and 24-bit
    • Sampling rates : 8000, 11025, 16000, 22050, 24000, 32000, 44100, 48000 Hz
    • Channels : As many channels as the number of microphones on the device
  • [C-1-2] MUST capture at above sample rates without up-sampling.

  • [C-1-3] MUST include an appropriate anti-aliasing filter when the sample rates given above are captured with down-sampling.

  • SHOULD allow AM radio and DVD quality capture of raw audio content, which means the following characteristics:

    • Format : Linear PCM, 16-bit
    • Sampling rates : 22050, 48000 Hz
    • Channels : Stereo
  • [C-1-4] MUST honor the MicrophoneInfo API and properly fill in information for the available microphones on device accessible to the third-party applications via the AudioManager.getMicrophones() API, for active AudioRecord using MediaRecorder.AudioSources DEFAULT , MIC , CAMCORDER , VOICE_RECOGNITION , VOICE_COMMUNICATION , UNPROCESSED , or VOICE_PERFORMANCE . If device implementations allow AM radio and DVD quality capture of raw audio content, they:

  • [C-2-1] MUST capture without up-sampling at any ratio higher than 16000:22050 or 44100:48000.

  • [C-2-2] MUST include an appropriate anti-aliasing filter for any up-sampling or down-sampling.

5.4.2. Capture for Voice Recognition

If device implementations declare android.hardware.microphone , they:

  • [C-1-1] MUST capture android.media.MediaRecorder.AudioSource.VOICE_RECOGNITION audio source at one of the sampling rates, 44100 and 48000.
  • [C-1-2] MUST, by default, disable any noise reduction audio processing when recording an audio stream from the AudioSource.VOICE_RECOGNITION audio source.
  • [C-1-3] MUST, by default, disable any automatic gain control when recording an audio stream from the AudioSource.VOICE_RECOGNITION audio source.

  • SHOULD exhibit approximately flat amplitude-versus-frequency characteristics in the mid-frequency range: specifically ±3dB from 100 Hz to 4000 Hz for each and every microphone used to record the voice recognition audio source.

  • [C-SR-1] are STRONGLY RECOMMENDED to exhibit amplitude levels in the low frequency range: specifically from ±20 dB from 30 Hz to 100 Hz compared to the mid-frequency range for each and every microphone used to record the voice recognition audio منبع

  • [C-SR-2] are STRONGLY RECOMMENDED to exhibit amplitude levels in the high frequency range: specifically from ±30 dB from 4000 Hz to 22 KHz compared to the mid-frequency range for each and every microphone used to record the voice recognition audio منبع

  • SHOULD set audio input sensitivity such that a 1000 Hz sinusoidal tone source played at 90 dB Sound Pressure Level (SPL) (measured next to the microphone) yields an ideal response of RMS 2500 within a range of 1770 and 3530 for 16 bit-samples (or -22.35 db ±3dB Full Scale for floating point/double precision samples) for each and every microphone used to record the voice recognition audio source.

  • SHOULD record the voice recognition audio stream so that the PCM amplitude levels linearly track input SPL changes over at least a 30 dB range from -18 dB to +12 dB re 90 dB SPL at the microphone.

  • SHOULD record the voice recognition audio stream with total harmonic distortion (THD) less than 1% for 1 kHz at 90 dB SPL input level at the microphone.

If device implementations declare android.hardware.microphone and noise suppression (reduction) technologies tuned for speech recognition, they:

  • [C-2-1] MUST allow this audio effect to be controllable with the android.media.audiofx.NoiseSuppressor API.
  • [C-2-2] MUST uniquely identify each noise suppression technology implementation via the AudioEffect.Descriptor.uuid field.

5.4.3. Capture for Rerouting of Playback

The android.media.MediaRecorder.AudioSource class includes the REMOTE_SUBMIX audio source.

If device implementations declare both android.hardware.audio.output and android.hardware.microphone , they:

  • [C-1-1] MUST properly implement the REMOTE_SUBMIX audio source so that when an application uses the android.media.AudioRecord API to record from this audio source, it captures a mix of all audio streams except for the following:

    • AudioManager.STREAM_RING
    • AudioManager.STREAM_ALARM
    • AudioManager.STREAM_NOTIFICATION

5.4.4. Acoustic Echo Canceler

If device implementations declare android.hardware.microphone , they:

  • SHOULD implement an Acoustic Echo Canceler (AEC) technology tuned for voice communication and applied to the capture path when capturing using AudioSource.VOICE_COMMUNICATION .

If device implementations provides an Acoustic Echo Canceler which is inserted in the capture audio path when AudioSource.VOICE_COMMUNICATION is selected, they:

5.4.5. Concurrent Capture

If device implementations declare android.hardware.microphone ,they MUST implement concurrent capture as described in this document . به طور مشخص:

  • [C-1-1] MUST allow concurrent access to microphone by an accessibility service capturing with AudioSource.VOICE_RECOGNITION and at least one application capturing with any AudioSource .
  • [C-1-2] MUST allow concurrent access to microphone by a pre-installed application that holds an Assistant role and at least one application capturing with any AudioSource except for AudioSource.VOICE_COMMUNICATION or AudioSource.CAMCORDER .
  • [C-1-3] MUST silence the audio capture for any other application, except for an accessibility service, while an application is capturing with AudioSource.VOICE_COMMUNICATION or AudioSource.CAMCORDER . However, when an app is capturing via AudioSource.VOICE_COMMUNICATION then another app can capture the voice call if it is a privileged (pre-installed) app with permission CAPTURE_AUDIO_OUTPUT .
  • [C-1-4] If two or more applications are capturing concurrently and if neither app has an UI on top, the one that started capture the most recently receives audio.

5.5. پخش صدا

Android includes the support to allow apps to playback audio through the audio output peripheral as defined in section 7.8.2.

5.5.1. Raw Audio Playback

If device implementations declare android.hardware.audio.output , they:

  • [C-1-1] MUST allow playback of raw audio content with the following characteristics:

    • Source formats : Linear PCM, 16-bit, 8-bit, float
    • Channels : Mono, Stereo, valid multichannel configurations with up to 8 channels
    • Sampling rates (in Hz) :
      • 8000, 11025, 16000, 22050, 24000, 32000, 44100, 48000 at the channel configurations listed above
      • 96000 in mono and stereo

5.5.2. جلوه های صوتی

Android provides an API for audio effects for device implementations.

If device implementations declare the feature android.hardware.audio.output , they:

  • [C-1-1] MUST support the EFFECT_TYPE_EQUALIZER and EFFECT_TYPE_LOUDNESS_ENHANCER implementations controllable through the AudioEffect subclasses Equalizer and LoudnessEnhancer .
  • [C-1-2] MUST support the visualizer API implementation, controllable through the Visualizer class.
  • [C-1-3] MUST support the EFFECT_TYPE_DYNAMICS_PROCESSING implementation controllable through the AudioEffect subclass DynamicsProcessing .

Start of new requirements for Android 15

  • [C-1-4] MUST support audio effects with floating-point input and output , when the effect results are returned to the framework audio pipeline. This refers to typical insert or aux effects such as the equalizer. Equivalent behavior is strongly recommended when the effect results are not visible by the framework audio pipeline (such as, post-processing or offloaded effects) .

End of new requirements

Start of new requirements for Android 15

  • [C-1-5] MUST make sure that audio effects support multiple channels up to the mixer channel count also known as FCC_LIMIT , when the effect results are returned to the framework audio pipeline. This refers to typical insert or aux effects, but excludes special effects such as downmix, upmix, spatialization effects which change the channel count. Equivalent behavior is recommended when the effects are not visible by the framework audio pipeline (such as, post-processing or offloaded effects) .

End of new requirements

  • SHOULD support the EFFECT_TYPE_BASS_BOOST , EFFECT_TYPE_ENV_REVERB , EFFECT_TYPE_PRESET_REVERB , and EFFECT_TYPE_VIRTUALIZER implementations controllable through the AudioEffect sub-classes BassBoost , EnvironmentalReverb , PresetReverb , and Virtualizer .
  • [C-SR-1] Are STRONGLY RECOMMENDED to support effects in floating-point and multichannel.

5.5.3. Audio Output Volume

Automotive device implementations:

  • SHOULD allow adjusting audio volume separately per each audio stream using the content type or usage as defined by AudioAttributes and car audio usage as publicly defined in android.car.CarAudioManager .

5.5.4. Audio Offload

If device implementations support audio offload playback , they:

  • [C-SR-1] Are STRONGLY RECOMMENDED to trim the played gapless audio content between two clips with the same format when specified by the AudioTrack gapless API and the media container for MediaPlayer.

5.6. Audio Latency

Audio latency is the time delay as an audio signal passes through a system. Many classes of applications rely on short latencies, to achieve real-time sound effects.

For the purposes of this section, use the following definitions:

  • output latency . The interval between when an application writes a frame of PCM-coded data and when the corresponding sound is presented to the environment at an on-device transducer or the signal leaves the device via a port and can be observed externally.
  • cold output latency . The time between starting an output stream and the presentation time of the first frame based on timestamps, when the audio output system has been idle and powered down prior to the request.
  • continuous output latency . The output latency for subsequent frames, after the device is playing audio.
  • input latency . The interval between when a sound is presented by environment to device at an on-device transducer or signal enters the device via a port and when an application reads the corresponding frame of PCM-coded data.
  • lost input . The initial portion of an input signal that is unusable or unavailable.
  • cold input latency . The time between starting the stream and when the first valid frame is received, when the audio input system has been idle and powered down prior to the request.
  • continuous input latency . The input latency for subsequent frames, while the device is capturing audio.
  • continuous round-trip latency . The sum of continuous input latency plus continuous output latency plus one buffer period. The buffer period allows time for the app to process the signal and time for the app to mitigate phase difference between input and output streams.
  • OpenSL ES PCM buffer queue API . The set of PCM-related OpenSL ES APIs within Android NDK .
  • AAudio native audio API . The set of AAudio APIs within Android NDK .
  • مهر زمان A pair consisting of a relative frame position within a stream and the estimated time when that frame enters or leaves the audio processing pipeline on the associated endpoint. See also AudioTimestamp .
  • glitch . A temporary interruption or incorrect sample value in the audio signal, typically caused by a buffer underrun for output, buffer overrun for input, or any other source of digital or analog noise.
  • mean absolute deviation (MAD) . The average of the absolute value of the deviations from the mean for a set of values.

Start of new requirements for Android 15

  • tap-to-tone latency (TTL) , as measured by CTS Verifier, is the time between when the screen is tapped and when a tone generated as a result of that tap is heard on the speaker. This is averaged over 5 measurements using the AAudio native audio API for output.

  • Round-Trip latency (RTL) , as measured by the CTS Verifier, is the Mean Continuous latency over 5 measurements, measured over a loopback path that feeds the output back to the input, using the AAudio native audio API. The loopback paths are:

    • Speaker/mic: Built-in speaker to built-in microphone.
    • Analog: 3.5mm analog jack and a loopback adapter.
    • USB: USB to 3.5mm adapter and a loopback adapter or a USB audio interface and loopback cables.
  • FEATURE_AUDIO_PRO . The android.hardware.audio.pro feature is declared.

  • MPC . Media Performance Class

End of new requirements

Start of new requirements for Android 15

  • head-tracking latency . The time it takes from the head motion captured by the inertial measurement unit (IMU) to the headphone transducers' detection of the change in sound caused by this motion.

End of new requirements

If device implementations declare android.hardware.audio.output , they MUST meet or exceed the following requirements:

Start of new requirements for Android 15

  • [C-1-1] The output timestamp returned by AudioTrack.getTimestamp and AAudioStream_getTimestamp is accurate to +/- 2 ms.

End of new requirements

  • [C-1-2] Cold output latency of 500 milliseconds or less.

  • [C-1-3] Opening an output stream using AAudioStreamBuilder_openStream() MUST take less than 1000 milliseconds.

Start of new requirements for Android 15

  • [C-1-4] The calculated round-trip latencies based on input and output timestamps returned by AAudioStream_getTimestamp MUST be within 200 msec of the measured round trip latency for AAUDIO_PERFORMANCE_MODE_NONE and AAUDIO_PERFORMANCE_MODE_LOW_LATENCY for speakers, wired and wireless headsets.

End of new requirements

Start of new requirements for Android 15

If device implementations declare android.hardware.audio.output they are STRONGLY RECOMMENDED to meet or exceed the following requirements:

  • [C-SR-1] Cold output latency of 100 milliseconds or less over the speaker data path.

  • [C-SR-2] Tap-to-tone latency of 80 milliseconds or less.

  • [C-SR-4] The calculated round-trip latencies based on input and output timestamps returned by AAudioStream_getTimestamp are STRONGLY RECOMMENDED to be within 30 msec of the measured round trip latency for AAUDIO_PERFORMANCE_MODE_NONE and AAUDIO_PERFORMANCE_MODE_LOW_LATENCY for speakers, wired and wireless headsets.

End of new requirements

Start of new requirements for Android 15

If device implementations meet the above requirements, after any initial calibration, when using the AAudio native audio API, for continuous output latency and cold output latency over at least one supported audio output device, they are:

End of new requirements

Start of new requirements for Android 15

If device implementations do not meet the requirements for low-latency audio via the AAudio native audio API, they:

  • [C-2-1] MUST NOT report support for low-latency audio.

End of new requirements

If device implementations include android.hardware.microphone , they MUST meet these input audio requirements:

Start of new requirements for Android 15

  • [C-3-1] Limit the error in input timestamps, as returned by AudioRecord.getTimestamp or AAudioStream_getTimestamp , to +/- 2 ms. "Error" here means the deviation from the correct value.

End of new requirements

  • [C-3-2] Cold input latency of 500 milliseconds or less.
  • [C-3-3] Opening an input stream using AAudioStreamBuilder_openStream() MUST take less than 1000 milliseconds.

Start of new requirements for Android 15

If device implementations include android.hardware.microphone , they are STRONGLY RECOMMENDED to meet these input audio requirements:

  • [C-SR-8] Cold input latency of 100 milliseconds or less over the microphone data path.
  • [C-SR-11] Limit the error in input timestamps, as returned by AudioRecord.getTimestamp or AAudioStream_getTimestamp , to +/- 1 ms.

End of new requirements

Start of new requirements for Android 15

If device implementations declare android.hardware.audio.output and android.hardware.microphone , they:

  • [C-SR-12] Are STRONGLY RECOMMENDED to have a Mean Continuous Round-Trip Latency of 50 milliseconds or less over 5 measurements, with a Mean Absolute Deviation less than 10 msec, over at least one supported path.

End of new requirements

Start of new requirements for Android 15

The following table defines the requirements for RTL for Handheld device implementations as defined in 2.2.1 that declare android.hardware.audio.output and android.hardware.microphone .

Device and Declarations RTL (ms) MAD (ms) Loopback Paths
دستی 250 30 speaker/mic, analog 3.5mm (if supported), USB (if supported)
>= MPC_T (14) 80 15 at least one path
FEATURE_AUDIO_LOW_LATENCY 50 10 at least one path
FEATURE_AUDIO_PRO 25 5 at least one path
FEATURE_AUDIO_PRO 20 5 analog (if supported)
FEATURE_AUDIO_PRO 25 5 USB (if analog not supported)

End of new requirements

Start of new requirements for Android 15

The following table defines the requirements for TTL for Handheld device implementations as defined in 2.2.1 that declare android.hardware.audio.output and android.hardware.microphone .

Device and Declarations TTL (ms)
دستی 250
>= MPC_T (14) 80
MPC_S (13) 100
FEATURE_AUDIO_PRO 80

End of new requirements

Start of new requirements for Android 15

If device implementations include support for spatial audio with head tracking and declare the PackageManager.FEATURE_AUDIO_SPATIAL_HEADTRACKING_LOW_LATENCY flag, they:

  • [C-4-1] MUST exhibit a maximum head-tracking to audio-update latency of 300 ms.

End of new requirements

5.7. پروتکل های شبکه

Device implementations MUST support the media network protocols for audio and video playback as specified in the Android SDK documentation.

For each codec and container format that a device implementation is required to support, the device implementation:

  • [C-1-1] MUST support that codec or container over HTTP and HTTPS.

  • [C-1-2] MUST support the corresponding media segment formats as shown in the media segment formats table below over HTTP Live Streaming draft protocol, Version 7 .

  • [C-1-3] MUST support the corresponding RTSP payload formats as shown in the RTSP table below. For exceptions please see the table footnotes in section 5.1 .

Media Segment Formats

Segment formats مرجع(های) Required codec support
MPEG-2 Transport Stream ISO 13818 Video codecs:
  • H264 AVC
  • MPEG-4 SP
  • MPEG-2
See section 5.1.8 for details on H264 AVC, MPEG2-4 SP,
and MPEG-2.

Audio codecs:

  • AAC
See section 5.1.3 for details on AAC and its variants.
AAC with ADTS framing and ID3 tags ISO 13818-7 See section 5.1.1 for details on AAC and its variants
WebVTT WebVTT

RTSP (RTP, SDP)

نام پروفایل مرجع(های) Required codec support
H264 AVC RFC 6184 See section 5.1.8 for details on H264 AVC
MP4A-LATM RFC 6416 See section 5.1.3 for details on AAC and its variants
H263-1998 RFC 3551
RFC 4629
RFC 2190
See section 5.1.8 for details on H263
H263-2000 RFC 4629 See section 5.1.8 for details on H263
AMR RFC 4867 See section 5.1.3 for details on AMR-NB
AMR-WB RFC 4867 See section 5.1.3 for details on AMR-WB
MP4V-ES RFC 6416 See section 5.1.8 for details on MPEG-4 SP
mpeg4-generic RFC 3640 See section 5.1.3 for details on AAC and its variants
MP2T RFC 2250 See MPEG-2 Transport Stream underneath HTTP Live Streaming for details

5.8. Secure Media

If device implementations support secure video output and are capable of supporting secure surfaces, they:

  • [C-1-1] MUST declare support for Display.FLAG_SECURE .

If device implementations declare support for Display.FLAG_SECURE and support wireless display protocol, they:

  • [C-2-1] MUST secure the link with a cryptographically strong mechanism such as HDCP 2.x or higher for the displays connected through wireless protocols such as Miracast.

If device implementations declare support for Display.FLAG_SECURE and support wired external display, they:

  • [C-3-1] MUST support HDCP 1.2 or higher for all external displays connected via a user-accessible wired port.

5.9. Musical Instrument Digital Interface (MIDI)

If device implementations report support for feature android.software.midi via the android.content.pm.PackageManager class, they:

  • [C-1-1] MUST support MIDI over all MIDI-capable hardware transports for which they provide generic non-MIDI connectivity, where such transports are:

  • [C-1-2] MUST support the inter-app MIDI software transport (virtual MIDI devices)

  • [C-1-3] MUST include libamidi.so (native MIDI support)

  • SHOULD support MIDI over USB peripheral mode, section 7.7

5.10. صوتی حرفه ای

If device implementations report support for feature android.hardware.audio.pro via the android.content.pm.PackageManager class, they:

  • [C-1-1] MUST report support for feature android.hardware.audio.low_latency .

Start of new requirements for Android 15

  • [C-1-2] MUST have the continuous round-trip audio latency , meet the latency requirements for FEATURE_AUDIO_PRO as defined in section 5.6 Audio Latency of 25 milliseconds or less over at least one supported path .

End of new requirements

  • [C-1-3] MUST include a USB port(s) supporting USB host mode and USB peripheral mode.
  • [C-1-4] MUST report support for feature android.software.midi .

Start of new requirements for Android 15

  • [C-1-5] MUST meet latencies and USB audio latency requirements using the AAudio native audio API and AAUDIO_PERFORMANCE_MODE_LOW_LATENCY .

End of new requirements

  • [C-1-6] MUST have Cold output latency of 200 milliseconds or less.
  • [C-1-7] MUST have Cold input latency of 200 milliseconds or less.

Start of new requirements for Android 15

  • [C-1-8] MUST have an average Tap-to-tone latency of 80 milliseconds or less over at least 5 measurements over the speaker to microphone data path.
  • [C-SR-1] Are STRONGLY RECOMMENDED to meet latencies as defined in section 5.6 Audio Latency , of 20 milliseconds or less, over 5 measurements with a Mean Absolute Deviation less than 5 milliseconds over the speaker to microphone path.
  • [C-SR-2] Are STRONGLY RECOMMENDED to meet the Pro Audio requirements for continuous round-trip audio latency, cold input latency and cold output latency and USB audio requirements using the AAudio native audio API over the MMAP path.
  • [C-SR-3] Are STRONGLY RECOMMENDED to provide a consistent level of CPU performance while audio is active and CPU load is varying. This should be tested using the Android app SynthMark . SynthMark uses a software synthesizer running on a simulated audio framework that measures system performance. See the SynthMark documentation for an explanation of the benchmarks. The SynthMark app needs to be run using the "Automated Test" option and achieve the following results:

    • voicemark.90 >= 32 voices
    • latencymark.fixed.little <= 15 msec
    • latencymark.dynamic.little <= 50 msec
  • SHOULD minimize audio clock inaccuracy and drift relative to standard time.

  • SHOULD minimize audio clock drift relative to the CPU CLOCK_MONOTONIC when both are active.

  • SHOULD minimize audio latency over on-device transducers.

  • SHOULD minimize audio latency over USB digital audio.

  • SHOULD document audio latency measurements over all paths.

  • SHOULD minimize jitter in audio buffer completion callback entry times, as this affects usable percentage of full CPU bandwidth by the callback.

  • SHOULD provide zero audio glitches under normal use at reported latency.

  • SHOULD provide zero inter-channel latency difference.

  • SHOULD minimize MIDI mean latency over all transports.

  • SHOULD minimize MIDI latency variability under load (jitter) over all transports.

  • SHOULD provide accurate MIDI timestamps over all transports.

  • SHOULD minimize audio signal noise over on-device transducers, including the period immediately after cold start.

  • SHOULD provide zero audio clock difference between the input and output sides of corresponding end-points, when both are active. Examples of corresponding end-points include the on-device microphone and speaker, or the audio jack input and output.

  • SHOULD handle audio buffer completion callbacks for the input and output sides of corresponding end-points on the same thread when both are active, and enter the output callback immediately after the return from the input callback. Or if it is not feasible to handle the callbacks on the same thread, then enter the output callback shortly after entering the input callback to permit the application to have a consistent timing of the input and output sides.

  • SHOULD minimize the phase difference between HAL audio buffering for the input and output sides of corresponding end-points.

  • SHOULD minimize touch latency.

  • SHOULD minimize touch latency variability under load (jitter).

End of new requirements

Start of new requirements for Android 15

If device implementations meet all of the above requirements, they:

End of new requirements

If device implementations include a 4 conductor 3.5mm audio jack, they:

Start of new requirements for Android 15

  • [C-2-1] MUST have a mean Continuous Round-trip Audio Latency, as defined in section 5.6 Audio Latency , of 20 milliseconds or less, over 5 measurements with a Mean Absolute Deviation less than 5 milliseconds over the audio jack path using an Audio Loopback Dongle .

End of new requirements

Start of new requirements for Android 15

End of new requirements

If device implementations omit a 4 conductor 3.5mm audio jack and include a USB port(s) supporting USB host mode, they:

  • [C-3-1] MUST implement the USB audio class.

Start of new requirements for Android 15

  • [C-3-2] MUST have a mean Continuous Round-trip Audio Latency of 25 milliseconds or less, over 5 measurements with a Mean Absolute Deviation less than 5 milliseconds over the USB host mode port using USB audio class. (This can be measured using a USB-3.5mm adapter and an Audio Loopback Dongle, or using a USB audio interface with patch cables connecting the inputs to outputs).
  • [C-SR-6] Are STRONGLY RECOMMENDED to support simultaneous I/O up to 8 channels each direction, 96 kHz sample rate, and 24-bit or 32-bit depth, when used with USB audio peripherals that also support these requirements.
  • [C-SR-7] Are STRONGLY RECOMMENDED to meet this group of requirements using the AAudio native audio API over the MMAP path.

End of new requirements

Start of new requirements for Android 15

If device implementations include an HDMI port, they:

  • SHOULD support output in stereo and eight channels at 20-bit or 24-bit depth and 192 kHz without bit-depth loss or resampling, in at least one configuration.

End of new requirements

5.11. Capture for Unprocessed

Android includes support for recording of unprocessed audio via the android.media.MediaRecorder.AudioSource.UNPROCESSED audio source. In OpenSL ES, it can be accessed with the record preset SL_ANDROID_RECORDING_PRESET_UNPROCESSED .

If device implementations intent to support unprocessed audio source and make it available to third-party apps, they:

  • [C-1-1] MUST report the support through the android.media.AudioManager property PROPERTY_SUPPORT_AUDIO_SOURCE_UNPROCESSED .

  • [C-1-2] MUST exhibit approximately flat amplitude-versus-frequency characteristics in the mid-frequency range: specifically ±10 dB from 100 Hz to 7000 Hz for each and every microphone used to record the unprocessed audio source.

  • [C-1-3] MUST exhibit amplitude levels in the low frequency range: specifically from ±20 dB from 5 z to 100 Hz compared to the mid-frequency range for each and every microphone used to record the unprocessed audio source.

  • [C-1-4] MUST exhibit amplitude levels in the high frequency range: specifically from ±30 dB from 7000 Hz to 22 KHz compared to the mid-frequency range for each and every microphone used to record the unprocessed audio source.

  • [C-1-5] MUST set audio input sensitivity such that a 1000 Hz sinusoidal tone source played at 94 dB Sound Pressure Level (SPL) yields a response with RMS of 520 for 16 bit-samples (or -36 dB Full Scale for floating point/double precision samples) for each and every microphone used to record the unprocessed audio source.

  • [C-1-6] MUST have a signal-to-noise ratio (SNR) at 60 dB or higher for each and every microphone used to record the unprocessed audio source. (whereas the SNR is measured as the difference between 94 dB SPL and equivalent SPL of self noise, A-weighted).

  • [C-1-7] MUST have a total harmonic distortion (THD) less than be less than 1% for 1 kHZ at 90 dB SPL input level at each and every microphone used to record the unprocessed audio source.

  • [C-1-8] MUST not have any other signal processing (eg Automatic Gain Control, High Pass Filter, or Echo cancellation) in the path other than a level multiplier to bring the level to desired range. به عبارت دیگر:

    • [C-1-9] If any signal processing is present in the architecture for any reason, it MUST be disabled and effectively introduce zero delay or extra latency to the signal path.
    • [C-1-10] The level multiplier, while allowed to be on the path, MUST NOT introduce delay or latency to the signal path.

All SPL measurements are made directly next to the microphone under test. For multiple microphone configurations, these requirements apply to each microphone.

If device implementations declare android.hardware.microphone but do not support unprocessed audio source, they:

  • [C-2-1] MUST return null for the AudioManager.getProperty(PROPERTY_SUPPORT_AUDIO_SOURCE_UNPROCESSED) API method, to properly indicate the lack of support.
  • [C-SR-1] are still STRONGLY RECOMMENDED to satisfy as many of the requirements for the signal path for the unprocessed recording source.

5.12. HDR Video

Android 13 supports the HDR technologies as described in an upcoming document.

Pixel Format

If a video decoder advertises support for COLOR_FormatYUVP010, then:

  • [C-1-1] MUST support the P010 format for CPU-read (ImageReader, MediaImage, ByteBuffer). In Android 13, P010 is relaxed to allow arbitrary stride for the Y and UV planes.

  • [C-1-2] The P010 output buffer MUST be able to be sampled by the GPU (when allocated with GPU_SAMPLING usage). This enables GPU composition and custom tone mapping by apps.

If a video decoder advertises support for COLOR_Format32bitABGR2101010, it:

  • [C-2-1] MUST support the RGBA_1010102 format for output surface and CPU-readable (ByteBuffer output).

If a video encoder advertises support for COLOR_FormatYUVP010, it:

  • [C-3-1] MUST support the P010 format for input surface and CPU-writeable (ImageWriter, MediaImage, ByteBuffer) input.

If a video encoder advertises support for COLOR_Format32bitABGR2101010, it:

  • [C-4-1] MUST support RGBA_1010102 format for input surface and CPU-writeable (ImageWriter, ByteBuffer) input. Note: Converting between various transfer curves is NOT required for encoders.

HDR Capture Requirements

For all video encoders that support HDR profiles, device implementations:

  • [C-5-1] MUST NOT assume that the HDR metadata is precise. For example, the encoded frame could have pixels beyond the peak luminance level, or the histogram might not be representative of the frame.

  • SHOULD aggregate HDR dynamic metadata to generate appropriate HDR static metadata for encoded streams, and they should output it at the end of each encoding session.

If device implementations support HDR capture using the CamcorderProfile APIs then they:

  • [C-6-1] MUST support HDR capture through the Camera2 APIs as well.

  • [C-6-2] MUST support at least one hardware-accelerated video encoder for each HDR technology supported.

  • [C-6-3] MUST support (at the minimum) HLG capture.

  • [C-6-4] MUST support writing the HDR metadata (if applicable to the HDR technology) into the captured video file. For AV1, HEVC, and DolbyVision this means including the metadata into the encoded bitstream.

  • [C-6-5] MUST support P010 and COLOR_FormatYUVP010.

  • [C-6-6] MUST support HDR to SDR tone mapping in the default hardware-accelerated decoder for the captured profile. In other words, if a device can capture HDR10+ HEVC, the default HEVC decoder MUST be able to decode the captured stream in SDR.

HDR Editing Requirements

If device implementations include video encoders that support HDR editing, then they:

  • SHOULD use minimal latency for generating the HDR metadata when not present, and SHOULD gracefully handle situations where the metadata is present for some frames and not for others. This metadata SHOULD be precise (for example, represent the actual peak luminance and histogram of the frame).

If device implementation includes codecs that support FEATURE_HdrEditing , then those codecs:

  • [C-7-1] MUST support at least one HDR profile.

  • [C-7-2] MUST support FEATURE_HdrEditing for all HDR profiles advertised by that codec. In other words, they MUST support generating HDR metadata when not present for all HDR profiles supported that use HDR metadata.

  • [C-7-3] MUST support the following video encoder input formats that fully preserve the HDR decoded signal:

    • RGBA_1010102 (already in the target transfer curve) for both input surface and ByteBuffer and MUST advertise support for COLOR_Format32bitABGR2101010.

If device implementation includes codecs that support FEATURE_HdrEditing, then the device:

  • [C-7-4] MUST advertise support for EXT_YUV_target OpenGL extension.

6. Developer Tools and Options Compatibility

6.1. ابزارهای توسعه دهنده

پیاده سازی دستگاه:

Start of new requirements for Android 15

  • [C-0-2] MUST support adb as documented in the Android SDK and the shell commands provided in the AOSP, which can be used by app developers, including dumpsys , cmd stats , and Simpleperf .

End of new requirements

  • [C-0-11] MUST support the shell command cmd testharness . به‌روزرسانی پیاده‌سازی‌های دستگاه از نسخه قبلی Android بدون بلوک داده دائمی ممکن است از C-0-11 مستثنی باشد.
  • [C-0-3] MUST NOT alter the format or the contents of device system events (batterystats, diskstats, fingerprint, graphicsstats, netstats, notification, procstats) logged via the dumpsys command.

Start of new requirements for Android 15

  • [C-0-10] MUST record, without omission, and make the following events accessible and available to the cmd stats shell command and the StatsManager System API class.
    • ActivityForegroundStateChanged
    • AnomalyDetected
    • AppBreadcrumbReported
    • AppCrashOccurred
    • AppStartOccurred
    • BatteryLevelChanged
    • BatterySaverModeStateChanged
    • BleScanResultReceived
    • BleScanStateChanged
    • ChargingStateChanged
    • DeviceIdleModeStateChanged
    • ForegroundServiceStateChanged
    • GpsScanStateChanged
    • InputDeviceUsageReported
    • JobStateChanged
    • KeyboardConfigured
    • KeyboardSystemsEventReported
    • PluggedStateChanged
    • ScheduledJobStateChanged
    • ScreenStateChanged
    • SyncStateChanged
    • SystemElapsedRealtime
    • TouchpadUsage
    • UidProcessStateChanged
    • WakelockStateChanged
    • WakeupAlarmOccurred
    • WifiLockStateChanged
    • WifiMulticastLockStateChanged
    • WifiScanStateChanged

End of new requirements

  • [C-0-4] MUST have the device-side adb daemon be inactive by default and there MUST be a user-accessible mechanism to turn on the Android Debug Bridge.
  • [C-0-5] MUST support secure adb. Android includes support for secure adb. Secure adb enables adb on known authenticated hosts.
  • [C-0-6] MUST provide a mechanism allowing adb to be connected from a host machine. به طور مشخص:

If device implementations without a USB port support peripheral mode, they:

  • [C-3-1] MUST implement adb via local-area network (such as Ethernet or Wi-Fi).
  • [C-3-2] MUST provide drivers for Windows 7, 8 and 10, allowing developers to connect to the device using the adb protocol.

If device implementations support adb connections to a host machine via Wi-Fi or Ethernet, they:

  • [C-4-1] MUST have the AdbManager#isAdbWifiSupported() method return true .

If device implementations support adb connections to a host machine via Wi-Fi or Ethernet, and includes at least one camera, they:

  • [C-5-1] MUST have the AdbManager#isAdbWifiQrSupported() method return true .

  • Dalvik Debug Monitor Service (ddms)

    • [C-0-7] MUST support all ddms features as documented in the Android SDK. As ddms uses adb, support for ddms SHOULD be inactive by default, but MUST be supported whenever the user has activated the Android Debug Bridge, as above.
  • SysTrace

    • [C-0-9] باید از ابزار systrace همانطور که در Android SDK مستند شده است پشتیبانی کند. Systrace باید به طور پیش‌فرض غیرفعال باشد و برای روشن کردن Systrace باید مکانیزمی در دسترس کاربر وجود داشته باشد.
  • پرفتو

    • [C-SR-1] Are STRONGLY RECOMMENDED to expose a /system/bin/perfetto binary to the shell user which cmdline complies with the perfetto documentation .
    • [C-SR-2] The perfetto binary is STRONGLY RECOMMENDED to accept as input a protobuf config that complies with the schema defined in the perfetto documentation .
    • [C-SR-3] The perfetto binary is STRONGLY RECOMMENDED to write as output a protobuf trace that complies with the schema defined in the perfetto documentation .
    • [C-SR-4] Are STRONGLY RECOMMENDED to provide, through the perfetto binary, at least the data sources described in the perfetto documentation .
  • Low Memory Killer

    • [C-0-12] MUST write a LMK_KILL_OCCURRED_FIELD_NUMBER Atom to the statsd log when an app is terminated by the Low Memory Killer .
  • Test Harness Mode If device implementations support the shell command cmd testharness and run cmd testharness enable , they:

    • [C-2-1] MUST return true for ActivityManager.isRunningInUserTestHarness()
    • [C-2-2] MUST implement Test Harness Mode as described in Test Harness Mode documentation .
  • GPU work information

    پیاده سازی دستگاه:

    • [C-0-13] MUST implement the shell command dumpsys gpu --gpuwork to display the aggregated GPU work data returned by the power/gpu_work_period kernel tracepoint, or display no data if the tracepoint is not supported. The AOSP implementation is frameworks/native/services/gpuservice/gpuwork/ .

If device implementations report the support of Vulkan 1.0 or higher via the android.hardware.vulkan.version feature flags, they:

  • [C-1-1] MUST provide an affordance for the app developer to enable/disable GPU debug layers.
  • [C-1-2] MUST, when the GPU debug layers are enabled, enumerate layers in libraries provided by external tools (ie not part of the platform or application package) found in debuggable applications' base directory to support vkEnumerateInstanceLayerProperties() and vkCreateInstance() API methods.

6.2. گزینه های توسعه دهنده

Android includes support for developers to configure application development-related settings.

Device implementations MUST provide a consistent experience for Developer Options, they:

  • [C-0-1] MUST honor the android.settings.APPLICATION_DEVELOPMENT_SETTINGS intent to show application development-related settings. The upstream Android implementation hides the Developer Options menu by default and enables users to launch Developer Options after pressing seven (7) times on the Settings > About Device > Build Number menu item.
  • [C-0-2] MUST hide Developer Options by default.
  • [C-0-3] MUST provide a clear mechanism that does not give preferential treatment to one third-party app as opposed to another to enable Developer Options. MUST provide a public visible document or website that describes how to enable Developer Options. This document or website MUST be linkable from the Android SDK documents.
  • SHOULD have an ongoing visual notification to the user when Developer Options is enabled and the safety of the user is of concern.
  • MAY temporarily limit access to the Developer Options menu, by visually hiding or disabling the menu, to prevent distraction for scenarios where the safety of the user is of concern.

7. Hardware Compatibility

If a device includes a particular hardware component that has a corresponding API for third-party developers:

  • [C-0-1] The device implementation MUST implement that API as described in the Android SDK documentation.

If an API in the SDK interacts with a hardware component that is stated to be optional and the device implementation does not possess that component:

  • [C-0-2] Complete class definitions (as documented by the SDK) for the component APIs MUST still be presented.
  • [C-0-3] The API's behaviors MUST be implemented as no-ops in some reasonable fashion.
  • [C-0-4] API methods MUST return null values where permitted by the SDK documentation.
  • [C-0-5] API methods MUST return no-op implementations of classes where null values are not permitted by the SDK documentation.
  • [C-0-6] API methods MUST NOT throw exceptions not documented by the SDK documentation.
  • [C-0-7] Device implementations MUST consistently report accurate hardware configuration information via the getSystemAvailableFeatures() and hasSystemFeature(String) methods on the android.content.pm.PackageManager class for the same build fingerprint.

A typical example of a scenario where these requirements apply is the telephony API: Even on non-phone devices, these APIs must be implemented as reasonable no-ops.

7.1. نمایشگر و گرافیک

Android includes facilities that automatically adjust application assets and UI layouts appropriately for the device to ensure that third-party applications run well on a variety of hardware displays and configurations. An Android-compatible display is a display screen that implements all of the behaviors and APIs described in Android Developers - Screen compatibility overview , this section (7.1) and its subsections, as well as any additional device-type specific behaviors documented in section 2 of this CDD.

پیاده سازی دستگاه:

  • [C-0-1] MUST, by default, render third party applications only onto Android-compatible displays.

The units referenced by the requirements in this section are defined as follows:

  • physical diagonal size . The distance in inches between two opposing corners of the illuminated portion of the display.
  • تراکم . The number of pixels encompassed by a linear horizontal or vertical span of 1", expressed as pixels per inch (ppi or dpi). Where ppi and dpi values are listed, both horizontal and vertical dpi must fall within the listed range.
  • نسبت تصویر . The ratio of the pixels of the longer dimension to the shorter dimension of the screen. For example, a display of 480x854 pixels would be 854/480 = 1.779, or roughly "16:9".
  • density-independent pixel (dp) . A virtual pixel unit normalized to a screen density of 160. For some density d, and a number of pixels p, the number of density-independent pixels dp, is calculated as: dp = (160 / d) * p.

7.1.1. Screen Configuration

7.1.1.1. Screen Size and Shape

The Android UI framework supports a variety of different logical screen layout sizes, and allows applications to query the current configuration's screen layout size via Configuration.screenLayout with the SCREENLAYOUT_SIZE_MASK and Configuration.smallestScreenWidthDp .

پیاده سازی دستگاه:

  • [C-0-1] MUST report the correct layout size for the Configuration.screenLayout as defined in the Android SDK documentation. Specifically, device implementations MUST report the correct logical density-independent pixel (dp) screen dimensions as below:

    • Devices with the Configuration.uiMode set as any value other than UI_MODE_TYPE_WATCH, and reporting a small size for the Configuration.screenLayout , MUST have at least 426 dp x 320 dp.
    • Devices reporting a normal size for the Configuration.screenLayout , MUST have at least 480 dp x 320 dp.
    • Devices reporting a large size for the Configuration.screenLayout , MUST have at least 640 dp x 480 dp.
    • Devices reporting a xlarge size for the Configuration.screenLayout , MUST have at least 960 dp x 720 dp.
  • [C-0-2] MUST correctly honor applications' stated support for screen sizes through the < supports-screens > attribute in the AndroidManifest.xml, as described in the Android SDK documentation.

  • MAY have the Android-compatible display(s) with rounded corners.

If device implementations support screens capable of the UI_MODE_TYPE_NORMAL size configuration and use physical display(s) with rounded corners to render these screens, they:

  • [C-1-1] MUST ensure that at least one of the following requirements is met for each such display:

    • The radius of the rounded corners is less than or equal to 38 dp.
    • When an 18 dp by 18 dp box is anchored at each corner of the logical display, at least one pixel of each box is visible on the screen.
  • SHOULD include user affordance to switch to the display mode with the rectangular corners.

If device implementations are only capable of NO_KEYS keyboard configuration, and intend to report support for the UI_MODE_TYPE_NORMAL ui mode configuration, they:

  • [C-4-1] MUST have a layout size, excluding any display cutouts, of at least 596 dp x 384 dp or greater.

For details on correctly implementing the sidecar or extension APIs refer to the public documentation of Window Manager Jetpack .

Start of new requirements for Android 15

If device implementations include one or more Android-compatible display areas that are foldable, or include a folding hinge between multiple Android-compatible display panel areas and make such display areas available to applications, they:

  • [C-4-1] MUST implement the correct version of the Window Manager Extensions API level as described in WindowManager Extensions .

End of new requirements

7.1.1.2. Screen Aspect Ratio

This section was deleted in Android 14.

7.1.1.3. تراکم صفحه نمایش

The Android UI framework defines a set of standard logical densities to help application developers target application resources.

Device Implementations:

  • [C-0-1] MUST report one of the Android framework densities that are listed on DisplayMetrics through the DENSITY_DEVICE_STABLE API and this value must be a static value for each physical display. However the device MAY report a different DisplayMetrics.density according to the display configuration changes made by the user (for example, display size) set after initial boot.

  • SHOULD define the standard Android framework density that is numerically closest to the physical density of the screen, or a value that would map to the same equivalent angular field-of-view measurements of a handheld device.

If device implementations provide an affordance to change the display size of the device, they:

  • [C-1-1] MUST NOT scale the display larger than 1.5 times DENSITY_DEVICE_STABLE or produce an effective minimum screen dimension smaller than 320dp (equivalent to resource qualifier sw320dp), whichever comes first.
  • [C-1-2] MUST NOT scale the display smaller than 0.85 times the DENSITY_DEVICE_STABLE .
  • To ensure good usability and consistent font sizes, it is RECOMMENDED that the following scaling of Native Display options be provided (while complying with the limits specified above)
    • Small: 0.85x
    • Default: 1x (Native display scale)
    • Large: 1.15x
    • Larger: 1.3x
    • Largest 1.45x

7.1.2. Display Metrics

If device implementations include the Android-compatible display(s) or video output to the Android-compatible display screen(s), they:

If device implementations does not include an embedded screen or video output, they:

  • [C-2-1] MUST report correct values of the Android-compatible display as defined in the android.util.DisplayMetrics API for the emulated default view.Display .

7.1.3. Screen Orientation

پیاده سازی دستگاه:

  • [C-0-1] MUST report which screen orientations they support ( android.hardware.screen.portrait and/or android.hardware.screen.landscape ) and MUST report at least one supported orientation. For example, a device with a fixed orientation landscape screen, such as a television or laptop, SHOULD only report android.hardware.screen.landscape .
  • [C-0-2] MUST report the correct value for the device's current orientation, whenever queried via the android.content.res.Configuration.orientation , android.view.Display.getOrientation() , or other APIs.

If device implementations support both screen orientations, they:

  • [C-1-1] MUST support dynamic orientation by applications to either portrait or landscape screen orientation. That is, the device must respect the application's request for a specific screen orientation.
  • [C-1-2] MUST NOT change the reported screen size or density when changing orientation.
  • MAY select either portrait or landscape orientation as the default.

7.1.4. 2D and 3D Graphics Acceleration

7.1.4.1. OpenGL ES

پیاده سازی دستگاه:

  • [C-0-1] MUST correctly identify the supported OpenGL ES versions (1.1, 2.0, 3.0, 3.1, 3.2) through the managed APIs (such as via the GLES10.getString() method) and the native APIs.
  • [C-0-2] MUST include the support for all the corresponding managed APIs and native APIs for every OpenGL ES versions they identified to support.

If device implementations include a screen or video output, they:

Start of new requirements for Android 15

End of new requirements

Start of new requirements for Android 15

  • [C-SR-1] Are STRONGLY RECOMMENDED to support OpenGL ES 3.1.

End of new requirements

  • SHOULD support OpenGL ES 3.2.

The OpenGL ES dEQP tests are partitioned into a number of test lists, each with an associated date/version number. These are in the Android source tree at external/deqp/android/cts/main/glesXX-master-YYYY-MM-DD.txt . A device that supports OpenGL ES at a self-reported level indicates that it can pass the dEQP tests in all test lists from this level and earlier.

If device implementations support any of the OpenGL ES versions, they:

  • [C-2-1] MUST report via the OpenGL ES managed APIs and native APIs any other OpenGL ES extensions they have implemented, and conversely MUST NOT report extension strings that they do not support.
  • [C-2-2] MUST support the EGL_KHR_image , EGL_KHR_image_base , EGL_ANDROID_image_native_buffer , EGL_ANDROID_get_native_client_buffer , EGL_KHR_wait_sync , EGL_KHR_get_all_proc_addresses , EGL_ANDROID_presentation_time , EGL_KHR_swap_buffers_with_damage , EGL_ANDROID_recordable , and EGL_ANDROID_GLES_layers extensions.
  • [C-2-3] MUST report the maximum version of the OpenGL ES dEQP tests supported via the android.software.opengles.deqp.level feature flag.
  • [C-2-4] MUST at least support version 132383489 (from Mar 1st, 2020) as reported in the android.software.opengles.deqp.level feature flag.
  • [C-2-5] MUST pass all OpenGL ES dEQP Tests in the test lists between version 132383489 and the version specified in the android.software.opengles.deqp.level feature flag, for each supported OpenGL ES version.
  • [C-SR-2] Are STRONGLY RECOMMENDED to support the EGL_KHR_partial_update and OES_EGL_image_external extensions.
  • SHOULD accurately report via the getString() method, any texture compression format that they support, which is typically vendor-specific.

  • SHOULD support the EGL_IMG_context_priority and EGL_EXT_protected_content extensions.

If device implementations declare support for OpenGL ES 3.0, 3.1, or 3.2, they:

  • [C-3-1] MUST export the corresponding function symbols for these version in addition to the OpenGL ES 2.0 function symbols in the libGLESv2.so library.
  • [C-SR-3] Are STRONGLY RECOMMENDED to support the OES_EGL_image_external_essl3 extension.

If device implementations support OpenGL ES 3.2, they:

  • [C-4-1] MUST support the OpenGL ES Android Extension Pack in its entirety.

If device implementations support the OpenGL ES Android Extension Pack in its entirety, they:

  • [C-5-1] MUST identify the support through the android.hardware.opengles.aep feature flag.

If device implementations expose support for the EGL_KHR_mutable_render_buffer extension, they:

  • [C-6-1] MUST also support the EGL_ANDROID_front_buffer_auto_refresh extension.
7.1.4.2. ولکان

Android includes support for Vulkan , a low-overhead, cross-platform API for high-performance 3D graphics.

If device implementations support OpenGL ES 3.1, they:

  • [C-SR-1] Are STRONGLY RECOMMENDED to include support for Vulkan 1.3.
  • [C-4-1] MUST NOT support a Vulkan variant version (ie the variant part of the Vulkan core version MUST be zero).

If device implementations include a screen or video output, they:

  • [C-SR-2] Are STRONGLY RECOMMENDED to include support for Vulkan 1.3.

The Vulkan dEQP tests are partitioned into a number of test lists, each with an associated date/version. These are in the Android source tree at external/deqp/android/cts/main/vk-master-YYYY-MM-DD.txt . A device that supports Vulkan at a self-reported level indicates that it can pass the dEQP tests in all test lists from this level and earlier.

If device implementations include support for Vulkan, they:

  • [C-1-1] MUST report the correct integer value with the android.hardware.vulkan.level and android.hardware.vulkan.version feature flags.
  • [C-1-2] MUST enumerate, at least one VkPhysicalDevice for the Vulkan native API vkEnumeratePhysicalDevices() .
  • [C-1-3] MUST fully implement the Vulkan 1.1 APIs for each enumerated VkPhysicalDevice .
  • [C-1-4] MUST enumerate layers, contained in native libraries named as libVkLayer*.so in the application package's native library directory, through the Vulkan native APIs vkEnumerateInstanceLayerProperties() and vkEnumerateDeviceLayerProperties() .
  • [C-1-5] MUST NOT enumerate layers provided by libraries outside of the application package, or provide other ways of tracing or intercepting the Vulkan API, unless the application has the android:debuggable attribute set as true or the metadata com.android.graphics.injectLayers.enable set to true .
  • [C-1-6] MUST report all extension strings that they do support via the Vulkan native APIs , and conversely MUST NOT report extension strings that they do not correctly support.
  • [C-1-7] MUST support the VK_KHR_surface, VK_KHR_android_surface, VK_KHR_swapchain, and VK_KHR_incremental_present extensions.
  • [C-1-8] MUST report the maximum version of the Vulkan dEQP Tests supported via the android.software.vulkan.deqp.level feature flag.
  • [C-1-9] MUST at least support version 132317953 (from Mar 1st, 2019) as reported in the android.software.vulkan.deqp.level feature flag.
  • [C-1-10] MUST pass all Vulkan dEQP Tests in the test lists between version 132317953 and the version specified in the android.software.vulkan.deqp.level feature flag.
  • [C-1-11] MUST NOT enumerate support for the VK_KHR_video_queue, VK_KHR_video_decode_queue, or VK_KHR_video_encode_queue extensions.
  • [C-SR-3] Are STRONGLY RECOMMENDED to support the VK_KHR_driver_properties and VK_GOOGLE_display_timing extensions.
  • [C-1-12] MUST NOT enumerate support for the VK_KHR_performance_query extension.
  • [C-SR-4] Are STRONGLY RECOMMENDED to satisfy the requirements specified by the Android Baseline 2022 profile .
  • [C-SR-5] Are STRONGLY RECOMMENDED to support VkPhysicalDeviceProtectedMemoryFeatures.protectedMemory and VK_EXT_global_priority .
  • [C-SR-6] Are STRONGLY RECOMMENDED to use SkiaVk with HWUI.

Start of new requirements for Android 15

If device implementations include support for Vulkan, then they:

  • [C-SR-8] Are STRONGLY RECOMMENDED to not modify the Vulkan loader.
  • [C-1-14] MUST NOT enumerate Vulkan Device extensions of type "KHR", "GOOGLE", or "ANDROID" unless these extensions are included in the android.software.vulkan.deqp.level feature flag.

End of new requirements

If device implementations do not include support for Vulkan 1.0, they:

  • [C-2-1] MUST NOT declare any of the Vulkan feature flags (eg android.hardware.vulkan.level , android.hardware.vulkan.version ).
  • [C-2-2] MUST NOT enumerate any VkPhysicalDevice for the Vulkan native API vkEnumeratePhysicalDevices() .

If device implementations include support for Vulkan 1.1 and declare any of the Vulkan feature flags described here , they:

  • [C-3-1] MUST expose support for the SYNC_FD external semaphore and handle types and the VK_ANDROID_external_memory_android_hardware_buffer extension.

  • [C-SR-7] Are STRONGLY RECOMMENDED to make the VK_KHR_external_fence_fd extension available to third-party applications and enable the application to export fence payload to and import fence payload from POSIX file descriptors as described here .

7.1.4.3. RenderScript

پیاده سازی دستگاه:

7.1.4.4. 2D Graphics Acceleration

Android includes a mechanism for applications to declare that they want to enable hardware acceleration for 2D graphics at the Application, Activity, Window, or View level through the use of a manifest tag android:hardwareAccelerated or direct API calls.

پیاده سازی دستگاه:

  • [C-0-1] MUST enable hardware acceleration by default, and MUST disable hardware acceleration if the developer so requests by setting android:hardwareAccelerated="false" or disabling hardware acceleration directly through the Android View APIs.
  • [C-0-2] MUST exhibit behavior consistent with the Android SDK documentation on hardware acceleration .

Android includes a TextureView object that lets developers directly integrate hardware-accelerated OpenGL ES textures as rendering targets in a UI hierarchy.

پیاده سازی دستگاه:

  • [C-0-3] MUST support the TextureView API, and MUST exhibit consistent behavior with the upstream Android implementation.
7.1.4.5. Wide-gamut Displays

If device implementations claim support for wide-gamut displays through Configuration.isScreenWideColorGamut() , they:

  • [C-1-1] MUST have a color-calibrated display.
  • [C-1-2] MUST have a display whose gamut covers the sRGB color gamut entirely in CIE 1931 xyY space.
  • [C-1-3] MUST have a display whose gamut has an area of at least 90% of DCI-P3 in CIE 1931 xyY space.
  • [C-1-4] MUST support OpenGL ES 3.1 or 3.2 and report it properly.
  • [C-1-5] MUST advertise support for the EGL_KHR_no_config_context , EGL_EXT_pixel_format_float , EGL_KHR_gl_colorspace , EGL_EXT_gl_colorspace_scrgb , EGL_EXT_gl_colorspace_scrgb_linear , EGL_EXT_gl_colorspace_display_p3 , EGL_EXT_gl_colorspace_display_p3_linear , and EGL_EXT_gl_colorspace_display_p3_passthrough extensions.
  • [C-SR-1] Are STRONGLY RECOMMENDED to support GL_EXT_sRGB .

Conversely, if device implementations do not support wide-gamut displays, they:

  • [C-2-1] SHOULD cover 100% or more of sRGB in CIE 1931 xyY space, although the screen color gamut is undefined.

7.1.5. Legacy Application Compatibility Mode

Android specifies a "compatibility mode" in which the framework operates in a 'normal' screen size equivalent (320dp width) mode for the benefit of legacy applications not developed for old versions of Android that pre-date screen-size independence.

7.1.6. فناوری صفحه نمایش

The Android platform includes APIs that allow applications to render rich graphics to an Android-compatible display. Devices MUST support all of these APIs as defined by the Android SDK unless specifically allowed in this document.

All of a device implementation's Android-compatible displays:

  • [C-0-1] MUST be capable of rendering 16-bit color graphics.
  • SHOULD support displays capable of 24-bit color graphics.
  • [C-0-2] MUST be capable of rendering animations.
  • [C-0-3] MUST have a pixel aspect ratio (PAR) between 0.9 and 1.15. That is, the pixel aspect ratio MUST be near square (1.0) with a 10 ~ 15% tolerance.

7.1.7. Secondary Displays

Android includes support for secondary Android-compatible displays to enable media sharing capabilities and developer APIs for accessing external displays.

If device implementations support an external display either via a wired, wireless, or an embedded additional display connection, they:

  • [C-1-1] MUST implement the DisplayManager system service and API as described in the Android SDK documentation.

7.2. دستگاه های ورودی

پیاده سازی دستگاه:

7.2.1. صفحه کلید

If device implementations include support for third-party Input Method Editor (IME) applications, they:

پیاده سازی دستگاه:

  • [C-0-1] MUST NOT include a hardware keyboard that does not match one of the formats specified in android.content.res.Configuration.keyboard (QWERTY or 12-key).
  • SHOULD include additional soft keyboard implementations.
  • MAY include a hardware keyboard.

7.2.2. Non-touch Navigation

Android includes support for d-pad, trackball, and wheel as mechanisms for non-touch navigation.

پیاده سازی دستگاه:

If device implementations lack non-touch navigations, they:

  • [C-1-1] MUST provide a reasonable alternative user interface mechanism for the selection and editing of text, compatible with Input Management Engines. The upstream Android open source implementation includes a selection mechanism suitable for use with devices that lack non-touch navigation inputs.

7.2.3. کلیدهای ناوبری

The Home , Recents , and Back functions typically provided via an interaction with a dedicated physical button or a distinct portion of the touch screen, are essential to the Android navigation paradigm and therefore, device implementations:

  • [C-0-1] MUST provide a user affordance to launch installed applications that have an activity with the <intent-filter> set with ACTION=MAIN and CATEGORY=LAUNCHER or CATEGORY=LEANBACK_LAUNCHER for Television device implementations. The Home function SHOULD be the mechanism for this user affordance.
  • SHOULD provide buttons for the Recents and Back function.

If the Home, Recents, or Back functions are provided, they:

  • [C-1-1] MUST be accessible with a single action (eg tap, double-click or gesture) when any of them are accessible.
  • [C-1-2] MUST provide a clear indication of which single action would trigger each function. Having a visible icon imprinted on the button, showing a software icon on the navigation bar portion of the screen, or walking the user through a guided step-by-step demo flow during the out-of-box setup experience are examples of such an نشانه

پیاده سازی دستگاه:

  • [C-SR-1] are STRONGLY RECOMMENDED to not provide the input mechanism for the Menu function as it is deprecated in favor of action bar since Android 4.0.

  • [C-SR-2] Are STRONGLY RECOMMENDED to provide all navigation functions as cancellable. 'Cancellable' is defined as the user's ability to prevent the navigation function from executing (eg going home, going back, etc.) if the swipe is not released past a certain threshold.

If device implementations provide the Menu function, they:

  • [C-2-1] MUST display the action overflow button whenever the action overflow menu popup is not empty and the action bar is visible.
  • [C-2-2] MUST NOT modify the position of the action overflow popup displayed by selecting the overflow button in the action bar, but MAY render the action overflow popup at a modified position on the screen when it is displayed by selecting the Menu تابع

If device implementations do not provide the Menu function, for backwards compatibility, they:

  • [C-3-1] MUST make the Menu function available to applications when targetSdkVersion is less than 10, either by a physical button, a software key, or gestures. This Menu function should be accessible unless hidden together with other navigation functions.

If device implementations provide the Assist function , they:

  • [C-4-1] MUST make the Assist function accessible with a single action (eg tap, double-click or gesture) when other navigation keys are accessible.
  • [C-SR-3] STRONGLY RECOMMENDED to use long press on HOME function as this designated interaction.

If device implementations use a distinct portion of the screen to display the navigation keys, they:

  • [C-5-1] Navigation keys MUST use a distinct portion of the screen, not available to applications, and MUST NOT obscure or otherwise interfere with the portion of the screen available to applications.
  • [C-5-2] MUST make available a portion of the display to applications that meets the requirements defined in section 7.1.1 .
  • [C-5-3] MUST honor the flags set by the app through the View.setSystemUiVisibility() API method, so that this distinct portion of the screen (aka the navigation bar) is properly hidden away as documented in the SDK.

If the navigation function is provided as an on-screen, gesture-based action:

If a navigation function is provided from anywhere on the left and right edges of the current orientation of the screen:

  • [C-7-1] The navigation function MUST be Back and provided as a swipe from both left and right edges of the current orientation of the screen.
  • [C-7-2] If custom swipeable system panels are provided on the left or right edges, they MUST be placed within the top 1/3rd of the screen with a clear, persistent visual indication that dragging in would invoke the aforementioned panels, and hence not Back. A system panel MAY be configured by a user such that it lands below the top 1/3rd of the screen edge(s) but the system panel MUST NOT use longer than 1/3rd of the edge(s).
  • [C-7-3] When the foreground app has either the View.SYSTEM_UI_FLAG_IMMERSIVE, View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY, WindowInsetsController.BEHAVIOR_DEFAULT, or WindowInsetsController.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE flags set, swiping from the edges MUST behave as implemented in AOSP, which is documented in the SDK .
  • [C-7-4] When the foreground app has either the View.SYSTEM_UI_FLAG_IMMERSIVE, View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY, WindowInsetsController.BEHAVIOR_DEFAULT, or WindowInsetsController.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE flags set, custom swipeable system panels MUST be hidden until the user brings in or un-dims the system bars (aka navigation and status bar) as implemented in AOSP.

If the back navigation function is provided and the user cancels the Back gesture, then:

  • [C-8-1] OnBackInvokedCallback.onBackCancelled() MUST be called.
  • [C-8-2] OnBackInvokedCallback.onBackInvoked() MUST NOT be called.
  • [C-8-3] KEYCODE_BACK event MUST NOT be dispatched.

If the back navigation function is provided but the foreground application does NOT have an OnBackInvokedCallback registered, then:

  • The system SHOULD provide an animation for the foreground application that suggests that the user is going back, as provided in AOSP.

If device implementations provide support for the system API setNavBarMode to allow any system app with android.permission.STATUS_BAR permission to set the navigation bar mode, then they:

  • [C-9-1] MUST provide support for kid-friendly icons or button-based navigation as provided in the AOSP code.

7.2.4. Touchscreen Input

Android includes support for a variety of pointer input systems, such as touchscreens, touch pads, and fake touch input devices. Touchscreen-based device implementations are associated with a display such that the user has the impression of directly manipulating items on screen. Since the user is directly touching the screen, the system does not require any additional affordances to indicate the objects being manipulated.

پیاده سازی دستگاه:

  • SHOULD have a pointer input system of some kind (either mouse-like or touch).
  • SHOULD support fully independently tracked pointers.

If device implementations include a touchscreen (single-touch or better) on a primary Android-compatible display, they:

  • [C-1-1] MUST report TOUCHSCREEN_FINGER for the Configuration.touchscreen API field.
  • [C-1-2] MUST report the android.hardware.touchscreen and android.hardware.faketouch feature flags.

If device implementations include a touchscreen that can track more than a single touch on a primary Android-compatible display, they:

  • [C-2-1] MUST report the appropriate feature flags android.hardware.touchscreen.multitouch , android.hardware.touchscreen.multitouch.distinct , android.hardware.touchscreen.multitouch.jazzhand corresponding to the type of the specific touchscreen on the دستگاه

If device implementations rely on an external input device such as mouse or trackball (ie not directly touching the screen) for input on a primary Android-compatible display and meet the fake touch requirements in section 7.2.5 , they:

  • [C-3-1] MUST NOT report any feature flag starting with android.hardware.touchscreen .
  • [C-3-2] MUST report only android.hardware.faketouch .
  • [C-3-3] MUST report TOUCHSCREEN_NOTOUCH for the Configuration.touchscreen API field.

7.2.5. Fake Touch Input

Fake touch interface provides a user input system that approximates a subset of touchscreen capabilities. For example, a mouse or remote control that drives an on-screen cursor approximates touch, but requires the user to first point or focus then click. Numerous input devices like the mouse, trackpad, gyro-based air mouse, gyro-pointer, joystick, and multi-touch trackpad can support fake touch interactions. Android includes the feature constant android.hardware.faketouch, which corresponds to a high-fidelity non-touch (pointer-based) input device such as a mouse or trackpad that can adequately emulate touch-based input (including basic gesture support), and indicates that the device supports an emulated subset of touchscreen functionality.

If device implementations do not include a touchscreen but include another pointer input system which they want to make available, they:

  • SHOULD declare support for the android.hardware.faketouch feature flag.

If device implementations declare support for android.hardware.faketouch , they:

  • [C-1-1] MUST report the absolute X and Y screen positions of the pointer location and display a visual pointer on the screen.
  • [C-1-2] MUST report touch event with the action code that specifies the state change that occurs on the pointer going down or up on the screen .
  • [C-1-3] MUST support pointer down and up on an object on the screen, which allows users to emulate tap on an object on the screen.
  • [C-1-4] MUST support pointer down, pointer up, pointer down then pointer up in the same place on an object on the screen within a time threshold, which allows users to emulate double tap on an object on the screen.
  • [C-1-5] MUST support pointer down on an arbitrary point on the screen, pointer move to any other arbitrary point on the screen, followed by a pointer up, which allows users to emulate a touch drag.
  • [C-1-6] MUST support pointer down then allow users to quickly move the object to a different position on the screen and then pointer up on the screen, which allows users to fling an object on the screen.

If device implementations declare support for android.hardware.faketouch.multitouch.distinct , they:

  • [C-2-1] MUST declare support for android.hardware.faketouch .
  • [C-2-2] MUST support distinct tracking of two or more independent pointer inputs.

If device implementations declare support for android.hardware.faketouch.multitouch.jazzhand , they:

  • [C-3-1] MUST declare support for android.hardware.faketouch .
  • [C-3-2] MUST support distinct tracking of 5 (tracking a hand of fingers) or more pointer inputs fully independently.

7.2.6. Game Controller Support

7.2.6.1. Button Mappings

پیاده سازی دستگاه:

  • [C-1-1] MUST be capable to map HID events to the corresponding InputEvent constants as listed in the below tables. The upstream Android implementation satisfies this requirement.

If device implementations embed a controller or ship with a separate controller in the box that would provide means to input all the events listed in the below tables, they:

  • [C-2-1] MUST declare the feature flag android.hardware.gamepad
دکمه HID Usage 2 Android Button
الف 1 0x09 0x0001 KEYCODE_BUTTON_A (96)
ب 1 0x09 0x0002 KEYCODE_BUTTON_B (97)
X 1 0x09 0x0004 KEYCODE_BUTTON_X (99)
Y 1 0x09 0x0005 KEYCODE_BUTTON_Y (100)
D-pad up 1
D-pad down 1
0x01 0x0039 3 AXIS_HAT_Y 4
D-pad left 1
D-pad right 1
0x01 0x0039 3 AXIS_HAT_X 4
Left shoulder button 1 0x09 0x0007 KEYCODE_BUTTON_L1 (102)
Right shoulder button 1 0x09 0x0008 KEYCODE_BUTTON_R1 (103)
Left stick click 1 0x09 0x000E KEYCODE_BUTTON_THUMBL (106)
Right stick click 1 0x09 0x000F KEYCODE_BUTTON_THUMBR (107)
Back 1 0x0c 0x0224 KEYCODE_BACK (4)

1 KeyEvent

2 The above HID usages must be declared within a Game pad CA (0x01 0x0005).

3 This usage must have a Logical Minimum of 0, a Logical Maximum of 7, a Physical Minimum of 0, a Physical Maximum of 315, Units in Degrees, and a Report Size of 4. The logical value is defined to be the clockwise rotation away from the vertical axis; for example, a logical value of 0 represents no rotation and the up button being pressed, while a logical value of 1 represents a rotation of 45 degrees and both the up and left keys being pressed.

4 MotionEvent

Analog Controls 1 HID Usage Android Button
Left Trigger 0x02 0x00C5 AXIS_LTRIGGER
Right Trigger 0x02 0x00C4 AXIS_RTRIGGER
Left Joystick 0x01 0x0030
0x01 0x0031
AXIS_X
AXIS_Y
Right Joystick 0x01 0x0032
0x01 0x0035
AXIS_Z
AXIS_RZ

1 MotionEvent

7.2.7. کنترل از راه دور

See Section 2.3.1 for device-specific requirements.

7.3. حسگرها

If device implementations include a particular sensor type that has a corresponding API for third-party developers, the device implementation MUST implement that API as described in the Android SDK documentation and the Android Open Source documentation on sensors .

پیاده سازی دستگاه:

  • [C-0-1] MUST accurately report the presence or absence of sensors per the android.content.pm.PackageManager class.
  • [C-0-2] MUST return an accurate list of supported sensors via the SensorManager.getSensorList() and similar methods.
  • [C-0-3] MUST behave reasonably for all other sensor APIs (for example, by returning true or false as appropriate when applications attempt to register listeners, not calling sensor listeners when the corresponding sensors are not present; etc.).

If device implementations include a particular sensor type that has a corresponding API for third-party developers, they:

  • [C-1-1] MUST report all sensor measurements using the relevant International System of Units (metric) values for each sensor type as defined in the Android SDK documentation.
  • [C-1-2] MUST report sensor data with a maximum latency of 100 milliseconds + 2 * sample_time for the case of a sensor stream with a maximum requested latency of 0 ms when the application processor is active. This delay does not include any filtering delays.
  • [C-1-3] MUST report the first sensor sample within 400 milliseconds + 2 * sample_time of the sensor being activated. It is acceptable for this sample to have an accuracy of 0.
  • [C-1-4] For any API indicated by the Android SDK documentation to be a continuous sensor , device implementations MUST continuously provide periodic data samples that SHOULD have a jitter below 3%, where jitter is defined as the standard deviation of the difference of the reported timestamp values between consecutive events.
  • [C-1-5] MUST ensure that the sensor event stream MUST NOT prevent the device CPU from entering a suspend state or waking up from a suspend state.
  • [C-1-6] MUST report the event time in nanoseconds as defined in the Android SDK documentation, representing the time the event happened and synchronized with the SystemClock.elapsedRealtimeNano() clock.
  • [C-SR-1] Are STRONGLY RECOMMENDED to have timestamp synchronization error below 100 milliseconds, and SHOULD have timestamp synchronization error below 1 millisecond.
  • When several sensors are activated, the power consumption SHOULD NOT exceed the sum of the individual sensor's reported power consumption.

The list above is not comprehensive; the documented behavior of the Android SDK and the Android Open Source Documentations on sensors is to be considered authoritative.

If device implementations include a particular sensor type that has a corresponding API for third-party developers, they:

  • [C-1-6] MUST set a non-zero resolution for all sensors, and report the value via the Sensor.getResolution() API method.

Some sensor types are composite, meaning they can be derived from data provided by one or more other sensors. (Examples include the orientation sensor and the linear acceleration sensor.)

پیاده سازی دستگاه:

  • SHOULD implement these sensor types, when they include the prerequisite physical sensors as described in sensor types .

If device implementations include a composite sensor, they:

  • [C-2-1] MUST implement the sensor as described in the Android Open Source documentation on composite sensors .

If device implementations include a particular sensor type that has a corresponding API for third-party developers and the sensor only reports one value, then device implementations:

  • [C-3-1] MUST set the resolution to 1 for the sensor and report the value via the Sensor.getResolution() API method.

If device implementations include a particular sensor type which supports SensorAdditionalInfo#TYPE_VEC3_CALIBRATION and the sensor is exposed to third-party developers, they:

  • [C-4-1] MUST NOT include any fixed, factory-determined calibration parameters in the data provided.

If device implementations include a combination of 3-axis accelerometer, a 3-axis gyroscope sensor, or a magnetometer sensor, they are:

  • [C-SR-2] STRONGLY RECOMMENDED to ensure the accelerometer, gyroscope and magnetometer have a fixed relative position, such that if the device is transformable (eg foldable), the sensor axes remain aligned and consistent with the sensor coordinate system throughout all possible device transformation states.

7.3.1. شتاب سنج

پیاده سازی دستگاه:

  • [C-SR-1] Are STRONGLY RECOMMENDED to include a 3-axis accelerometer.

If device implementations include an accelerometer, they:

  • [C-1-1] MUST be able to report events up to a frequency of at least 50 Hz.
  • [C-1-3] MUST comply with the Android sensor coordinate system as detailed in the Android APIs.
  • [C-1-4] MUST be capable of measuring from freefall up to four times the gravity(4g) or more on any axis.
  • [C-1-5] MUST have a resolution of at least 12-bits.
  • [C-1-6] MUST have a standard deviation no greater than 0.05 m/s^, where the standard deviation should be calculated on a per axis basis on samples collected over a period of at least 3 seconds at the fastest sampling rate.
  • SHOULD report events up to at least 200 Hz.
  • SHOULD have a resolution of at least 16-bits.
  • SHOULD be calibrated while in use if the characteristics changes over the lifecycle and compensated, and preserve the compensation parameters between device reboots.
  • SHOULD be temperature compensated.

If device implementations include a 3-axis accelerometer, they:

  • [C-2-1] MUST implement and report TYPE_ACCELEROMETER sensor.
  • [C-SR-4] Are STRONGLY RECOMMENDED to implement the TYPE_SIGNIFICANT_MOTION composite sensor.
  • [C-SR-5] Are STRONGLY RECOMMENDED to implement and report TYPE_ACCELEROMETER_UNCALIBRATED sensor. Android devices are STRONGLY RECOMMENDED to meet this requirement so they will be able to upgrade to the future platform release where this might become REQUIRED.
  • SHOULD implement the TYPE_SIGNIFICANT_MOTION , TYPE_TILT_DETECTOR , TYPE_STEP_DETECTOR , TYPE_STEP_COUNTER composite sensors as described in the Android SDK document.

If device implementations include an accelerometer with less than 3 axes, they:

  • [C-3-1] MUST implement and report TYPE_ACCELEROMETER_LIMITED_AXES sensor.
  • [C-SR-6] Are STRONGLY_RECOMMENDED to implement and report TYPE_ACCELEROMETER_LIMITED_AXES_UNCALIBRATED sensor.

If device implementations include a 3-axis accelerometer and any of the TYPE_SIGNIFICANT_MOTION , TYPE_TILT_DETECTOR , TYPE_STEP_DETECTOR , TYPE_STEP_COUNTER composite sensors are implemented:

  • [C-4-1] The sum of their power consumption MUST always be less than 4 mW.
  • SHOULD each be below 2 mW and 0.5 mW for when the device is in a dynamic or static condition.

If device implementations include a 3-axis accelerometer and a 3-axis gyroscope sensor, they:

  • [C-5-1] MUST implement the TYPE_GRAVITY and TYPE_LINEAR_ACCELERATION composite sensors.
  • [C-SR-7] Are STRONGLY RECOMMENDED to implement the TYPE_GAME_ROTATION_VECTOR composite sensor.

If device implementations include a 3-axis accelerometer, a 3-axis gyroscope sensor, and a magnetometer sensor, they:

  • [C-6-1] MUST implement a TYPE_ROTATION_VECTOR composite sensor.

7.3.2. مغناطیس سنج

پیاده سازی دستگاه:

  • [C-SR-1] Are STRONGLY RECOMMENDED to include a 3-axis magnetometer (compass).

If device implementations include a 3-axis magnetometer, they:

  • [C-1-1] MUST implement the TYPE_MAGNETIC_FIELD sensor.
  • [C-1-2] MUST be able to report events up to a frequency of at least 10 Hz and SHOULD report events up to at least 50 Hz.
  • [C-1-3] MUST comply with the Android sensor coordinate system as detailed in the Android APIs.
  • [C-1-4] MUST be capable of measuring between -900 µT and +900 µT on each axis before saturating.
  • [C-1-5] MUST have a hard iron offset value less than 700 µT and SHOULD have a value below 200 µT, by placing the magnetometer far from dynamic (current-induced) and static (magnet-induced) magnetic fields.
  • [C-1-6] MUST have a resolution equal or denser than 0.6 µT.
  • [C-1-7] MUST support online calibration and compensation of the hard iron bias, and preserve the compensation parameters between device reboots.
  • [C-1-8] MUST have the soft iron compensation applied—the calibration can be done either while in use or during the production of the device.
  • [C-1-9] MUST have a standard deviation, calculated on a per axis basis on samples collected over a period of at least 3 seconds at the fastest sampling rate, no greater than 1.5 µT; SHOULD have a standard deviation no greater than 0.5 µT.
  • [C-1-10] MUST implement the TYPE_MAGNETIC_FIELD_UNCALIBRATED sensor.

If device implementations include a 3-axis magnetometer, an accelerometer sensor, and a 3-axis gyroscope sensor, they:

  • [C-2-1] MUST implement a TYPE_ROTATION_VECTOR composite sensor.

If device implementations include a 3-axis magnetometer, an accelerometer, they:

  • MAY implement the TYPE_GEOMAGNETIC_ROTATION_VECTOR sensor.

If device implementations include a 3-axis magnetometer, an accelerometer and TYPE_GEOMAGNETIC_ROTATION_VECTOR sensor, they:

  • [C-3-1] MUST consume less than 10 mW.
  • SHOULD consume less than 3 mW when the sensor is registered for batch mode at 10 Hz.

7.3.3. جی پی اس

پیاده سازی دستگاه:

  • [C-SR-1] Are STRONGLY RECOMMENDED to include a GPS/GNSS receiver.

If device implementations include a GPS/GNSS receiver and report the capability to applications through the android.hardware.location.gps feature flag, they:

  • [C-1-1] MUST support location outputs at a rate of at least 1 Hz when requested via LocationManager#requestLocationUpdate .
  • [C-1-2] MUST be able to determine the location in open-sky conditions (strong signals, negligible multipath, HDOP < 2) within 10 seconds (fast time to first fix), when connected to a 0.5 Mbps or faster data speed internet connection. This requirement is typically met by the use of some form of Assisted or Predicted GPS/GNSS technique to minimize GPS/GNSS lock-on time (Assistance data includes Reference Time, Reference Location and Satellite Ephemeris/Clock).
    • [C-1-6] After making such a location calculation, device implementations MUST determine its location, in open sky, within 5 seconds, when location requests are restarted, up to an hour after the initial location calculation, even when the subsequent request is made without a data connection, and/or after a power cycle.
  • In open sky conditions after determining the location, while stationary or moving with less than 1 meter per second squared of acceleration:

    • [C-1-3] MUST be able to determine location within 20 meters, and speed within 0.5 meters per second, at least 95% of the time.
    • [C-1-4] MUST simultaneously track and report via GnssStatus.Callback at least 8 satellites from one constellation.
    • SHOULD be able to simultaneously track at least 24 satellites, from multiple constellations (eg GPS + at least one of Glonass, Beidou, Galileo).
  • [C-SR-2] Are STRONGLY RECOMMENDED to continue to deliver normal GPS/GNSS location outputs through GNSS Location Provider APIs during an emergency phone call.

  • [C-SR-3] Are STRONGLY RECOMMENDED to report GNSS measurements from all constellations tracked (as reported in GnssStatus messages), with the exception of SBAS.

  • [C-SR-4] Are STRONGLY RECOMMENDED to report AGC, and Frequency of GNSS measurement.

  • [C-SR-5] Are STRONGLY RECOMMENDED to report all accuracy estimates (including Bearing, Speed, and Vertical) as part of each GPS/GNSS location.

  • [C-SR-6] Are STRONGLY RECOMMENDED to report GNSS measurements, as soon as they are found, even if a location calculated from GPS/GNSS is not yet reported.

  • [C-SR-7] Are STRONGLY RECOMMENDED to report GNSS pseudoranges and pseudorange rates, that, in open-sky conditions after determining the location, while stationary or moving with less than 0.2 meter per second squared of acceleration, are sufficient to calculate position within 20 meters, and speed within 0.2 meters per second, at least 95% of the time.

7.3.4. ژیروسکوپ

پیاده سازی دستگاه:

  • [C-SR-1] Are STRONGLY RECOMMENDED to include a gyroscope sensor.

If device implementations include a gyroscope, they:

  • [C-1-1] MUST be able to report events up to a frequency of at least 50 Hz.
  • [C-1-4] MUST have a resolution of 12-bits or more.
  • [C-1-5] MUST be temperature compensated.
  • [C-1-6] MUST be calibrated and compensated while in use, and preserve the compensation parameters between device reboots.
  • [C-1-7] MUST have a variance no greater than 1e-7 rad^2 / s^2 per Hz (variance per Hz, or rad^2 / s). The variance is allowed to vary with the sampling rate, but MUST be constrained by this value. In other words, if you measure the variance of the gyro at 1 Hz sampling rate it SHOULD be no greater than 1e-7 rad^2/s^2.
  • [C-SR-2] Calibration error is STRONGLY RECOMMENDED to be less than 0.01 rad/s when device is stationary at room temperature.
  • [C-SR-3] Are STRONGLY RECOMMENDED to have a resolution of 16-bits or more.
  • SHOULD report events up to at least 200 Hz.

If device implementations include a 3-axis gyroscope, they:

If device implementations include a gyroscope with less than 3 axes, they:

  • [C-3-1] MUST implement and report TYPE_GYROSCOPE_LIMITED_AXES sensor.
  • [C-SR-5] Are STRONGLY_RECOMMENDED to implement and report TYPE_GYROSCOPE_LIMITED_AXES_UNCALIBRATED sensor.

If device implementations include a 3-axis gyroscope, an accelerometer sensor and a magnetometer sensor, they:

  • [C-4-1] MUST implement a TYPE_ROTATION_VECTOR composite sensor.

If device implementations include a 3-axis accelerometer and a 3-axis gyroscope sensor, they:

  • [C-5-1] MUST implement the TYPE_GRAVITY and TYPE_LINEAR_ACCELERATION composite sensors.
  • [C-SR-6] Are STRONGLY RECOMMENDED to implement the TYPE_GAME_ROTATION_VECTOR composite sensor.

7.3.5. فشارسنج

پیاده سازی دستگاه:

  • [C-SR-1] Are STRONGLY RECOMMENDED to include a barometer (ambient air pressure sensor).

If device implementations include a barometer, they:

  • [C-1-1] MUST implement and report TYPE_PRESSURE sensor.
  • [C-1-2] MUST be able to deliver events at 5 Hz or greater.
  • [C-1-3] MUST be temperature compensated.
  • [C-SR-2] STRONGLY RECOMMENDED to be able to report pressure measurements in the range 300hPa to 1100hPa.
  • SHOULD have an absolute accuracy of 1hPa.
  • SHOULD have a relative accuracy of 0.12hPa over 20hPa range (equivalent to ~1m accuracy over ~200m change at sea level).

7.3.6. دماسنج

If device implementations include an ambient thermometer (temperature sensor), they:

  • [C-1-1] MUST define SENSOR_TYPE_AMBIENT_TEMPERATURE for the ambient temperature sensor and the sensor MUST measure the ambient (room/vehicle cabin) temperature from where the user is interacting with the device in degrees Celsius.

If device implementations include a thermometer sensor that measures a temperature other than ambient temperature, such as CPU temperature, they:

If device implementations include a sensor for monitoring skin temperature, then they:

7.3.7. فتومتر

  • Device implementations MAY include a photometer (ambient light sensor).

7.3.8. Proximity Sensor

  • Device implementations MAY include a proximity sensor.

If device implementations include a proximity sensor and they report only a binary "near" or "far" reading, they:

  • [C-1-1] MUST measure the proximity of an object in the same direction as the screen. That is, the proximity sensor MUST be oriented to detect objects close to the screen, as the primary intent of this sensor type is to detect a phone in use by the user. If device implementations include a proximity sensor with any other orientation, it MUST NOT be accessible through this API.
  • [C-1-2] MUST have 1-bit of accuracy or more.
  • [C-1-3] MUST use 0 centimeters as the near reading and 5 centimeters as the far reading.
  • [C-1-4] MUST report a maximum range and resolution of 5.

7.3.9. High Fidelity Sensors

If device implementations include a set of higher quality sensors as defined in this section, and make available them to third-party apps, they:

  • [C-1-1] MUST identify the capability through the android.hardware.sensor.hifi_sensors feature flag.

If device implementations declare android.hardware.sensor.hifi_sensors , they:

  • [C-2-1] MUST have a TYPE_ACCELEROMETER sensor which:

    • MUST have a measurement range between at least -8g and +8g, and is STRONGLY RECOMMENDED to have a measurement range between at least -16g and +16g.
    • MUST have a measurement resolution of at least 2048 LSB/g.
    • MUST have a minimum measurement frequency of 12.5 Hz or lower.
    • MUST have a maximum measurement frequency of 400 Hz or higher; SHOULD support the SensorDirectChannel RATE_VERY_FAST .
    • MUST have a measurement noise not above 400 μg/√Hz.
    • MUST implement a non-wake-up form of this sensor with a buffering capability of at least 3000 sensor events.
    • MUST have a batching power consumption not worse than 3 mW.
    • [C-SR-1] Is STRONGLY RECOMMENDED to have 3dB measurement bandwidth of at least 80% of Nyquist frequency, and white noise spectrum within this bandwidth.
    • SHOULD have an acceleration random walk less than 30 μg √Hz tested at room temperature.
    • SHOULD have a bias change vs. temperature of ≤ +/- 1 mg/°C.
    • SHOULD have a best-fit line non-linearity of ≤ 0.5%, and sensitivity change vs. temperature of ≤ 0.03%/C°.
    • SHOULD have cross-axis sensitivity of < 2.5 % and variation of cross-axis sensitivity < 0.2% in device operation temperature range.
  • [C-2-2] MUST have a TYPE_ACCELEROMETER_UNCALIBRATED with the same quality requirements as TYPE_ACCELEROMETER .

  • [C-2-3] MUST have a TYPE_GYROSCOPE sensor which:

    • MUST have a measurement range between at least -1000 and +1000 dps.
    • MUST have a measurement resolution of at least 16 LSB/dps.
    • MUST have a minimum measurement frequency of 12.5 Hz or lower.
    • MUST have a maximum measurement frequency of 400 Hz or higher; SHOULD support the SensorDirectChannel RATE_VERY_FAST .
    • MUST have a measurement noise not above 0.014°/s/√Hz.
    • [C-SR-2] Is STRONGLY RECOMMENDED to have 3dB measurement bandwidth of at least 80% of Nyquist frequency, and white noise spectrum within this bandwidth.
    • SHOULD have a rate random walk less than 0.001 °/s √Hz tested at room temperature.
    • SHOULD have a bias change vs. temperature of ≤ +/- 0.05 °/ s / °C.
    • SHOULD have a sensitivity change vs. temperature of ≤ 0.02% / °C.
    • SHOULD have a best-fit line non-linearity of ≤ 0.2%.
    • SHOULD have a noise density of ≤ 0.007 °/s/√Hz.
    • SHOULD have calibration error less than 0.002 rad/s in temperature range 10 ~ 40 ℃ when device is stationary.
    • SHOULD have g-sensitivity less than 0.1°/s/g.
    • SHOULD have cross-axis sensitivity of < 4.0 % and cross-axis sensitivity variation < 0.3% in device operation temperature range.
  • [C-2-4] MUST have a TYPE_GYROSCOPE_UNCALIBRATED with the same quality requirements as TYPE_GYROSCOPE .

  • [C-2-5] MUST have a TYPE_GEOMAGNETIC_FIELD sensor which:

    • MUST have a measurement range between at least -900 and +900 μT.
    • MUST have a measurement resolution of at least 5 LSB/uT.
    • MUST have a minimum measurement frequency of 5 Hz or lower.
    • MUST have a maximum measurement frequency of 50 Hz or higher.
    • MUST have a measurement noise not above 0.5 uT.
  • [C-2-6] MUST have a TYPE_MAGNETIC_FIELD_UNCALIBRATED with the same quality requirements as TYPE_GEOMAGNETIC_FIELD and in addition:

    • MUST implement a non-wake-up form of this sensor with a buffering capability of at least 600 sensor events.
    • [C-SR-3] Is STRONGLY RECOMMENDED to have white noise spectrum from 1 Hz to at least 10 Hz when the report rate is 50 Hz or higher.
  • [C-2-7] MUST have a TYPE_PRESSURE sensor which:

    • MUST have a measurement range between at least 300 and 1100 hPa.
    • MUST have a measurement resolution of at least 80 LSB/hPa.
    • MUST have a minimum measurement frequency of 1 Hz or lower.
    • MUST have a maximum measurement frequency of 10 Hz or higher.
    • MUST have a measurement noise not above 2 Pa/√Hz.
    • MUST implement a non-wake-up form of this sensor with a buffering capability of at least 300 sensor events.
    • MUST have a batching power consumption not worse than 2 mW.
  • [C-2-8] MUST have a TYPE_GAME_ROTATION_VECTOR sensor.

  • [C-2-9] MUST have a TYPE_SIGNIFICANT_MOTION sensor which:

    • MUST have a power consumption not worse than 0.5 mW when device is static and 1.5 mW when device is moving.
  • [C-2-10] MUST have a TYPE_STEP_DETECTOR sensor which:

    • MUST implement a non-wake-up form of this sensor with a buffering capability of at least 100 sensor events.
    • MUST have a power consumption not worse than 0.5 mW when device is static and 1.5 mW when device is moving.
    • MUST have a batching power consumption not worse than 4 mW.
  • [C-2-11] MUST have a TYPE_STEP_COUNTER sensor which:

    • MUST have a power consumption not worse than 0.5 mW when device is static and 1.5 mW when device is moving.
  • [C-2-12] MUST have a TILT_DETECTOR sensor which:

    • MUST have a power consumption not worse than 0.5 mW when device is static and 1.5 mW when device is moving.
  • [C-2-13] The event timestamp of the same physical event reported by the Accelerometer, Gyroscope, and Magnetometer MUST be within 2.5 milliseconds of each other. The event timestamp of the same physical event reported by the Accelerometer and Gyroscope SHOULD be within 0.25 milliseconds of each other.

  • [C-2-14] MUST have Gyroscope sensor event timestamps on the same time base as the camera subsystem and within 1 milliseconds of error.

  • [C-2-15] MUST deliver samples to applications within 5 milliseconds from the time when the data is available on any of the above physical sensors to the application.

  • [C-2-16] MUST NOT have a power consumption higher than 0.5 mW when device is static and 2.0 mW when device is moving when any combination of the following sensors are enabled:

    • SENSOR_TYPE_SIGNIFICANT_MOTION
    • SENSOR_TYPE_STEP_DETECTOR
    • SENSOR_TYPE_STEP_COUNTER
    • SENSOR_TILT_DETECTORS
  • [C-2-17] MAY have a TYPE_PROXIMITY sensor, but if present MUST have a minimum buffer capability of 100 sensor events.

Note that all power consumption requirements in this section do not include the power consumption of the Application Processor. It is inclusive of the power drawn by the entire sensor chain—the sensor, any supporting circuitry, any dedicated sensor processing system, etc.

If device implementations include direct sensor support, they:

  • [C-3-1] MUST correctly declare support of direct channel types and direct report rates level through the isDirectChannelTypeSupported and getHighestDirectReportRateLevel API.
  • [C-3-2] MUST support at least one of the two sensor direct channel types for all sensors that declare support for sensor direct channel.
  • SHOULD support event reporting through sensor direct channel for primary sensor (non-wakeup variant) of the following types:
    • TYPE_ACCELEROMETER
    • TYPE_ACCELEROMETER_UNCALIBRATED
    • TYPE_GYROSCOPE
    • TYPE_GYROSCOPE_UNCALIBRATED
    • TYPE_MAGNETIC_FIELD
    • TYPE_MAGNETIC_FIELD_UNCALIBRATED

7.3.10. Biometric Sensors

For additional background on Measuring Biometric Unlock Security, please see Measuring Biometric Security documentation .

If device implementations include a secure lock screen, they:

  • SHOULD include a biometric sensor

Biometric sensors can be classified as Class 3 (formerly Strong ), Class 2 (formerly Weak ), or Class 1 (formerly Convenience ) based on their spoof and imposter acceptance rates, and on the security of the biometric pipeline. This classification determines the capabilities the biometric sensor has to interface with the platform and with third-party applications. Sensors need to meet additional requirements as detailed below if they wish to be classified as either Class 1 , Class 2 or Class 3 . Both Class 2 and Class 3 biometrics get additional capabilities as detailed below.

If device implementations make a biometric sensor available to third-party applications via android.hardware.biometrics.BiometricManager , android.hardware.biometrics.BiometricPrompt , and android.provider.Settings.ACTION_BIOMETRIC_ENROLL , they:

  • [C-4-1] MUST meet the requirements for Class 3 or Class 2 biometric as defined in this document.
  • [C-4-2] MUST recognize and honor each parameter name defined as a constant in the Authenticators class and any combinations thereof. Conversely, MUST NOT honor or recognize integer constants passed to the canAuthenticate(int) and setAllowedAuthenticators(int) methods other than those documented as public constants in Authenticators and any combinations thereof.
  • [C-4-3] MUST implement the ACTION_BIOMETRIC_ENROLL action on devices that have either Class 3 or Class 2 biometrics. This action MUST only present the enrollment entry points for Class 3 or Class 2 biometrics.

Start of new requirements for Android 15

  • [C-4-4] MUST allow applications to add custom content to BiometricPrompt using the PromptContentView content display formats. The content display formats MUST NOT be extended to allow imagery, links, interactive content, or other forms of media that are not already part of the BiometricPrompt API. Stylistic adjustments that do not alter, obscure, or truncate this content can be made (such as changing position, padding, margins, and typography).

End of new requirements

If device implementations support passive biometrics, they:

  • [C-5-1] MUST by default require an additional confirmation step (eg a button press).
  • [C-SR-1] Are STRONGLY RECOMMENDED to have a setting to allow users to override application preference and always require accompanying confirmation step.
  • [C-SR-2] Are STRONGLY RECOMMENDED to have the confirm action be secured such that an operating system or kernel compromise cannot spoof it. For example, this means that the confirm action based on a physical button is routed through an input-only general-purpose input/output (GPIO) pin of a secure element (SE) that cannot be driven by any other means than a physical button را فشار دهید.
  • [C-5-2] MUST additionally implement an implicit authentication flow (without confirmation step) corresponding to setConfirmationRequired(boolean) , which applications can set to utilize for sign-in flows.

If device implementations have multiple biometric sensors, they:

  • [C-7-1] MUST, when a biometric is in lockout (ie the biometric is disabled until the user unlocks with primary authentication) or time-bound lockout (ie the biometric is temporarily disabled until the user waits for a time interval) due to too many failed attempts, also lock out all other biometrics of a lower biometric class. In the case of time-bound lockout, the backoff time for biometric verification MUST be the maximum backoff time of all biometrics in time-bound lockout.

  • [C-SR-12] Are STRONGLY RECOMMENDED, when a biometric is in lockout (ie the biometric is disabled until the user unlocks with primary authentication) or time-bound lockout (ie the biometric is temporarily disabled until the user waits for a time interval) due to too many failed attempts, to also lock out all other biometrics of the same biometric class. In the case of time-bound lockout, the backoff time for biometric verification is STRONGLY RECOMMENDED to be the maximum backoff time of all biometrics in time-bound lockout.

  • [C-7-2] MUST challenge the user for the recommended primary authentication (eg: PIN, pattern, password) to reset the lockout counter for a biometric being locked out. Class 3 biometrics MAY be allowed to reset the lockout counter for a locked biometric of the same or lower class. Class 2 or Class 1 biometrics MUST NOT be allowed to complete a reset lockout operation for any biometrics.

  • [C-SR-3] Are STRONGLY RECOMMENDED to require only one biometric be confirmed per authentication (eg if both fingerprint and face sensors are available on the device, onAuthenticationSucceeded should be sent after any one of them is confirmed).

In order for device implementations to allow access to keystore keys to third-party applications, they:

  • [C-6-1] MUST meet the requirements for Class 3 as defined in this section below.
  • [C-6-2] MUST present only Class 3 biometrics when the authentication requires BIOMETRIC_STRONG , or the authentication is invoked with a CryptoObject .

If device implementations wish to treat a biometric sensor as Class 1 (formerly Convenience ), they:

  • [C-1-1] MUST have a false acceptance rate less than 0.002%.
  • [C-1-2] MUST disclose that this mode may be less secure than a strong PIN, pattern, or password and clearly enumerate the risks of enabling it, if the spoof and imposter acceptance rates are higher than 7% as measured by the Android Biometrics Test Protocols .
  • [C-1-9] MUST challenge the user for the recommended primary authentication (eg, PIN, pattern, password) after no more than twenty false trials and no less than ninety-second backoff time for biometric verification - where a false trial is one with an adequate capture quality (BIOMETRIC_ACQUIRED_GOOD) that does not match an enrolled biometric.
  • [C-SR-4] Are STRONGLY RECOMMENDED to lower the total number of false trials for biometric verification specified in [C-1-9] if the spoof and imposter acceptance rates are higher than 7% as measure by the Android Biometrics Test Protocols .
  • [C-1-3] MUST rate limit attempts for biometric verification - where a false trial is one with an adequate capture quality ( BIOMETRIC_ACQUIRED_GOOD ) that does not match an enrolled biometric.
  • [C-SR-5] Are STRONGLY RECOMMENDED to rate limit attempts for at least 30 seconds after five false trials for biometric verification for the maximum number of false trials per [C-1-9] - where a false trial is one with an adequate capture quality (BIOMETRIC_ACQUIRED_GOOD) that does not match an enrolled biometric.
  • [C-SR-6] Are STRONGLY RECOMMENDED to have all rate limiting logic in TEE.
  • [C-1-10] MUST disable biometrics once primary authentication backoff has first triggered as described in [C-0-2] of section 9.11.
  • [C-1-11] MUST have a spoof and imposter acceptance rate not higher than 30%, with (1) a spoof and imposter acceptance rate for Level A presentation attack instrument (PAI) species not higher than 30%, and (2) a spoof and imposter acceptance rate of Level B PAI species not higher than 40%, as measured by the Android Biometrics Test Protocols .
  • [C-1-4] MUST prevent adding new biometrics without first establishing a chain of trust by having the user confirm existing or add a new device credential (PIN/pattern/password) that's secured by TEE; the Android Open Source Project implementation provides the mechanism in the framework to do so.

Start of new requirements for Android 15

  • [C-1-5] MUST completely remove all identifiable biometric data for a user when the user's account is removed (including via a factory reset) or when the recommended primary authentication (eg PIN, pattern, password) is removed .

End of new requirements

Start of new requirements for Android 15

  • [C-1-7] MUST challenge the user for the recommended primary authentication (such as PIN, pattern, password) once every 24 hours or less. Note: Upgrading devices launched on Android version 9 or earlier MUST challenge the user for the recommended primary authentication (such as, PIN, pattern, password) once every 72 hours or less.

End of new requirements

Start of new requirements for Android 15

  • [C-1-8] MUST challenge the user for the recommended primary authentication (such as PIN, pattern, password) or Class 3 (STRONG) biometric after one of the following:
    • a 4-hour idle timeout period, OR
    • 3 failed biometric authentication attempts.
    • The idle timeout period and the failed authentication count is reset after any successful confirmation of the device credentials. Note: Upgrading devices launched on Android version 9 or earlier MAY be exempted from C-1-8.

End of new requirements

  • [C-SR-7] Are STRONGLY RECOMMENDED to use the logic in the framework provided by the Android Open Source Project to enforce constraints specified in [C-1-7] and [C-1-8] for new devices.
  • [C-SR-8] Are STRONGLY RECOMMENDED to have a false rejection rate of less than 10%, as measured on the device.
  • [C-SR-9] Are STRONGLY RECOMMENDED to have a latency below 1 second, measured from when the biometric is detected, until the screen is unlocked, for each enrolled biometric.
  • [C-1-12] MUST have a spoof and imposter acceptance rate not higher than 40% per presentation attack instrument (PAI) species , as measured by the Android Biometrics Test Protocols .
  • [C-SR-13] Are STRONGLY RECOMMENDED to have a spoof and imposter acceptance rate not higher than 30% per presentation attack instrument (PAI) species , as measured by the Android Biometrics Test Protocols .
  • [C-SR-8] Are STRONGLY RECOMMENDED to have a false rejection rate of less than 10%, as measured on the device.

Start of new requirements for Android 15

  • [C-1-15] MUST allow users to remove single or multiple biometrics enrollments.

End of new requirements

  • [C-SR-14] Are STRONGLY RECOMMENDED to disclose the biometric class of the biometric sensor and the corresponding risks of enabling it.

  • [C-SR-17] Are STRONGLY RECOMMENDED to implement the new AIDL interfaces (such as, IFace.aidl and IFingerprint.aidl ).

If device implementations wish to treat a biometric sensor as Class 2 (formerly Weak ), they:

  • [C-2-1] MUST meet all requirements for Class 1 above.
  • [C-2-2] MUST have a spoof and imposter acceptance rate not higher than 20%, with (1) a spoof and imposter acceptance rate for Level A presentation attack instrument (PAI) species not higher than 20%, and (2) a spoof and imposter acceptance rate of Level B PAI species not higher than 30%, as measured by the Android Biometrics Test Protocols .
  • [C-SR-15] Are STRONGLY RECOMMENDED to have a spoof and imposter acceptance rate not higher than 20% per presentation attack instrument (PAI) species , as measured by the Android Biometrics Test Protocols .
  • [C-2-3] MUST perform the biometric matching in an isolated execution environment outside Android user or kernel space, such as the Trusted Execution Environment (TEE), on a chip with a secure channel to the isolated execution environment or on Protected Virtual Machine that meets requirements in Section 9.17.
  • [C-2-4] MUST have all identifiable data encrypted and cryptographically authenticated such that they cannot be acquired, read or altered outside of the isolated execution environment or a chip with a secure channel to the isolated execution environment as documented in the implementation guidelines on the Android Open Source Project site or a Protected Virtual Machine controlled by hypervisor that meets requirements in Section 9.17.
  • [C-2-5] For camera based biometrics, while biometric based authentication or enrollment is happening:
    • MUST operate the camera in a mode that prevents camera frames from being read or altered outside the isolated execution environment or a chip with a secure channel to the isolated execution environment or a Protected Virtual Machine controlled by hypervisor that meets requirements in Section 9.17.
    • برای راه‌حل‌های تک دوربینی RGB، فریم‌های دوربین می‌توانند در خارج از محیط اجرای ایزوله قابل خواندن باشند تا از عملیات‌هایی مانند پیش‌نمایش برای ثبت‌نام پشتیبانی کنند، اما همچنان نباید قابل تغییر باشند.
  • [C-2-6] MUST NOT enable third-party applications to distinguish between individual biometric enrollments.
  • [C-2-7] MUST NOT allow unencrypted access to identifiable biometric data or any data derived from it (such as embeddings) to the Application Processor outside the context of the TEE or the Protected Virtual Machine controlled by hypervisor that meets requirements in Section 9.17. Upgrading devices launched on Android version 9 or earlier are not exempted from C-2-7.
  • [C-2-8] MUST have a secure processing pipeline such that an operating system or kernel compromise cannot allow data to be directly injected to falsely authenticate as the user. Note: If device implementations are already launched on Android version 9 or earlier and cannot meet the requirement C-2-8 through a system software update, they MAY be exempted from the requirement.

  • [C-SR-10] Are STRONGLY RECOMMENDED to include liveness detection for all biometric modalities and attention detection for Face biometrics.

  • [C-2-9] MUST make the biometric sensor available to third-party applications.

If device implementations wish to treat a biometric sensor as Class 3 (formerly Strong ), they:

  • [C-3-1] MUST meet all the requirements of Class 2 above, except for [C-1-7] and [C-1-8].
  • [C-3-2] MUST have a hardware-backed keystore implementation.
  • [C-3-3] MUST have a spoof and imposter acceptance rate not higher than 7%, with (1) a spoof and imposter acceptance rate for Level A presentation attack instrument (PAI) species not higher than 7%, and (2) a spoof and imposter acceptance rate of Level B PAI species not higher than 20%, as measured by the Android Biometrics Test Protocols .
  • [C-3-4] MUST challenge the user for the recommended primary authentication (such as PIN, pattern, password) once every 72 hours or less.
  • [C-3-5] MUST re-generate Authenticator ID for all Class 3 biometrics supported on device if any of them is re-enrolled.
  • [C-3-6] Must enable biometric-backed keystore keys to third-party applications.
  • [C-SR-16] Are STRONGLY RECOMMENDED to have a spoof and imposter acceptance rate not higher than 7% per presentation attack instrument (PAI) species , as measured by the Android Biometrics Test Protocols . If device implementations contain an under-display fingerprint sensor (UDFPS), they:

  • [C-SR-11] Are STRONGLY RECOMMENDED to prevent the touchable area of the UDFPS from interfering with 3-button navigation( which some users might require for accessibility purposes).

7.3.11. Pose Sensor

پیاده سازی دستگاه:

  • MAY support pose sensor with 6 degrees of freedom.

If device implementations support pose sensor with 6 degrees of freedom, they:

  • [C-1-1] MUST implement and report TYPE_POSE_6DOF sensor.
  • [C-1-2] MUST be more accurate than the rotation vector alone.

7.3.12. Hinge Angle Sensor

If device implementations support a hinge angle sensor, they: