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Android APIs

Welcome to the Android Open Source Project!

Android is an open source software stack for a wide range of mobile devices and a corresponding open source project led by Google. This site offers the information and source code you need to create custom variants of the Android stack, port devices and accessories to the Android platform, and ensure your devices meet compatibility requirements.

What's New

Audio Framework and Near Ultrasound CTS Tests

Find comprehensive guides for testing the Audio Framework and Near Ultrasound capabilities of Android devices within the Compatibility Test Suite CTS Verifier section.

Malloc Debugging and Native Memory Tracking

New documents on malloc debugging and native memory tracking using libc Callbacks have been published to the Android Open Source Project (AOSP) and linked from Debugging Native Memory Use.

Trusty Build Instructions

Links and commands have been added for downloading and building the Trusty Trusted Execution Environment (TEE).

May Android Security Bulletin

The May 2016 Android Security Bulletin has been published along with updates to the Android Security severity ratings. In addition, new build numbers have been published for Nexus 5, Nexus 6, Nexus 7, Nexus 9, Nexus 5X, Nexus 6P, and Nexus Player running Android 6.0 to support the May Android security release.

CTS Updated to 6.0R6, 5.1R7 and 5.0R6

New versions of the Compatibility Test Suite (CTS) have been released for Android 6.0, 5.1, and 5.0. In additon, the Downloads page has been moved under CTS since links to the Android Compatibility Definition Document (CDD) have been moved to a dedicated Compatibility Definition Document page.

CDD as Web Page, Older Versions Available

The Android Compatibility Definition Document (CDD) is now published as a web page for easy access, and all older versions of the CDD and associated version strings are now listed on a central Compatibility Definition Document page.

Getting Started

Explore the Source

Get the complete Android platform and modify and build it to suit your needs. You can also contribute to the Android Open Source Project (AOSP) repository to make your changes available to everyone else in the Android ecosystem.

Android framework summary

Port Android to Devices

Port the latest Android platform and create compelling devices that your customers want.

Make Secure

Follow these examples and instructions to harden your Android devices against malicious attacks. Find out how the Android security program works and learn to implement the latest features.

Get Compatible

Being Android-compatible lets you offer custom features but still give users and developers a consistent and standard experience across all Android-powered devices. Android provides guidance and a test suite to verify your Android compatibility.

Help this Site

Use the Site Feedback button at the bottom of any page to request improvements to the content or identify errors. In addition, is maintained in the Android Open Source Project. See the docs/ project log in AOSP for the complete list of changes to this site. Contribute your own updates to that same project and help maintain