自 2025 年 3 月 27 日起，我们建议您使用 android-latest-release 而非 aosp-main 构建 AOSP 并为其做出贡献。如需了解详情，请参阅 AOSP 的变更。
配置共享库
使用集合让一切井井有条
根据您的偏好保存内容并对其进行分类。
创建音频政策配置后，您必须将 HAL 实现打包到共享库中，并将其复制到相应位置：
- 创建一个
device/<company>/<device>/audio 目录以包含您的库的源文件。
- 创建一个
Android.mk 文件以构建共享库。确保 Makefile 包含以下行：
LOCAL_MODULE := audio.primary.<device>
您的库必须命名为 audio.primary.<device>.so，以便 Android 可以正确加载库。此文件名的 primary 部分表示此共享库用于设备上的主要音频硬件。模块名称 audio.a2dp.<device> 和 audio.usb.<device> 也可用于蓝牙和 USB 音频接口。以下是 Galaxy Nexus 音频硬件的 Android.mk 示例：
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := audio.primary.tuna
LOCAL_MODULE_RELATIVE_PATH := hw
LOCAL_SRC_FILES := audio_hw.c ril_interface.c
LOCAL_C_INCLUDES += \
external/tinyalsa/include \
$(call include-path-for, audio-utils) \
$(call include-path-for, audio-effects)
LOCAL_SHARED_LIBRARIES := liblog libcutils libtinyalsa libaudioutils libdl
LOCAL_MODULE_TAGS := optional
include $(BUILD_SHARED_LIBRARY)
- 如果您的产品支持 Android CDD 指定的低延迟音频，请将相应的 XML 功能文件复制到您的产品中。例如，在您产品的
device/<company>/<device>/device.mk Makefile 中：
PRODUCT_COPY_FILES := ...
PRODUCT_COPY_FILES += \
frameworks/native/data/etc/android.hardware.audio.low_latency.xml:system/etc/permissions/android.hardware.audio.low_latency.xml \
- 将您之前创建的音频政策配置文件复制到您产品的
device/<company>/<device>/device.mk Makefile 的 system/etc/ 目录下。例如：
PRODUCT_COPY_FILES += \
device/samsung/tuna/audio/audio_policy.conf:system/etc/audio_policy.conf
- 在您产品的
device/<company>/<device>/device.mk Makefile 中声明您的产品所需的音频 HAL 的共享模块。例如，Galaxy Nexus 需要主要音频 HAL 模块和蓝牙音频 HAL 模块：
PRODUCT_PACKAGES += \
audio.primary.tuna \
audio.a2dp.default
本页面上的内容和代码示例受内容许可部分所述许可的限制。Java 和 OpenJDK 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC)：2025-03-26。
[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["没有我需要的信息","missingTheInformationINeed","thumb-down"],["太复杂/步骤太多","tooComplicatedTooManySteps","thumb-down"],["内容需要更新","outOfDate","thumb-down"],["翻译问题","translationIssue","thumb-down"],["示例/代码问题","samplesCodeIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC)：2025-03-26。"],[],[],null,["# Configure a shared library\n\nAfter creating an\n[audio policy\nconfiguration](/docs/core/audio/implement-policy), you must package the HAL implementation into a shared library\nand copy it to the appropriate location:\n\n1. Create a `device/\u003ccompany\u003e/\u003cdevice\u003e/audio` directory to contain your library's source files.\n2. Create an `Android.mk` file to build the shared library. Ensure the Makefile contains the following line: \n\n ```\n LOCAL_MODULE := audio.primary.\u003cdevice\u003e\n ```\n\n Your library must be named `audio.primary.\u003cdevice\u003e.so`\n so Android can correctly load the library. The `primary` portion of\n this filename indicates that this shared library is for the primary audio\n hardware located on the device. The module names\n `audio.a2dp.\u003cdevice\u003e` and\n `audio.usb.\u003cdevice\u003e` are also available for Bluetooth and\n USB audio interfaces. Here is an example of an `Android.mk` from the\n Galaxy Nexus audio hardware: \n\n ```\n LOCAL_PATH := $(call my-dir)\n\n include $(CLEAR_VARS)\n\n LOCAL_MODULE := audio.primary.tuna\n LOCAL_MODULE_RELATIVE_PATH := hw\n LOCAL_SRC_FILES := audio_hw.c ril_interface.c\n LOCAL_C_INCLUDES += \\\n external/tinyalsa/include \\\n $(call include-path-for, audio-utils) \\\n $(call include-path-for, audio-effects)\n LOCAL_SHARED_LIBRARIES := liblog libcutils libtinyalsa libaudioutils libdl\n LOCAL_MODULE_TAGS := optional\n\n include $(BUILD_SHARED_LIBRARY)\n ```\n\n3. If your product supports low latency audio as specified by the Android CDD, copy the corresponding XML feature file into your product. For example, in your product's `device/\u003ccompany\u003e/\u003cdevice\u003e/device.mk` Makefile: \n\n ```\n PRODUCT_COPY_FILES := ...\n\n PRODUCT_COPY_FILES += \\\n frameworks/native/data/etc/android.hardware.audio.low_latency.xml:system/etc/permissions/android.hardware.audio.low_latency.xml \\\n ```\n\n4. Copy the audio policy configuration file you created earlier to the `system/etc/` directory in your product's `device/\u003ccompany\u003e/\u003cdevice\u003e/device.mk` Makefile. For example: \n\n ```\n PRODUCT_COPY_FILES += \\\n device/samsung/tuna/audio/audio_policy.conf:system/etc/audio_policy.conf\n ```\n\n5. Declare the shared modules of your audio HAL that are required by your product in the product's `device/\u003ccompany\u003e/\u003cdevice\u003e/device.mk` Makefile. For example, the Galaxy Nexus requires the primary and Bluetooth audio HAL modules: \n\n ```\n PRODUCT_PACKAGES += \\\n audio.primary.tuna \\\n audio.a2dp.default\n ```"]]
