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【安卓开发系列 -- 系统开发】AOSP 源码环境开发系统 APP 预置带有 SO 的 AAR 包

【1】案例说明

1. 在 AOSP 源码环境中开发系统 APP 时需要引入 android-gif-drawable AAR 包并显示 GIF 动图；2. 开发环境   2.1 开发板，AIO-3399C 六核 AI 开发板   2.2 主机，Win10；虚拟机，Ubuntu 16.04   2.3 android 源码，android 7.13. 本博客记录在上述开发环境下引入 android-gif-drawable AAR 包的方法；

【2】Android.mk 文件引入带有 SO 的 AAR 包

Android.mk 文件中关于引入 AAR 包的关键内容

# 引入 AAR 包LOCAL_STATIC_JAVA_AAR_LIBRARIES := android-gif-drawable# 引入 AAR 包LOCAL_AAPT_FLAGS := ...LOCAL_AAPT_FLAGS += --extra-packages pl.droidsonroids.gifLOCAL_AAPT_FLAGS += --extra-packages com.aispeech.dui.dds# 引入 AAR 包文件路径include $(CLEAR_VARS)LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES := android-gif-drawable:libs/android-gif-drawable-1.1.9.aarLOCAL_PREBUILT_STATIC_JAVA_LIBRARIES += lib-dds:libs/lib-dds-1.1.8.1-release.aarinclude $(BUILD_MULTI_PREBUILT)

Android.mk 文件中关于引入 SO 的关键内容

# 引入 SO 包LOCAL_JNI_SHARED_LIBRARIES := libpl_droidsonroids_gif# 引入 SO 包include $(CLEAR_VARS)LOCAL_MODULE_TAGS := optionalLOCAL_MODULE_SUFFIX := .soLOCAL_MODULE := libpl_droidsonroids_gifLOCAL_MODULE_CLASS := SHARED_LIBRARIESLOCAL_SRC_FILES_arm64 := jniLibs/arm64-v8a/libpl_droidsonroids_gif.soLOCAL_SRC_FILES_arm32 := jniLibs/armeabi-v7a/libpl_droidsonroids_gif.soLOCAL_MODULE_TARGET_ARCHS:= arm64 arm32LOCAL_MULTILIB := 64 32include $(BUILD_PREBUILT)

完整的 Android.mk 文件内容

LOCAL_PATH:= $(call my-dir)include $(CLEAR_VARS)LOCAL_RESOURCE_DIR := packages/apps/SecretRobot/resLOCAL_RESOURCE_DIR += frameworks/opt/datetimepicker/resifeq ($(TARGET_BUILD_APPS),)LOCAL_RESOURCE_DIR += frameworks/support/design/resLOCAL_RESOURCE_DIR += frameworks/support/v7/appcompat/resLOCAL_RESOURCE_DIR += frameworks/support/v7/gridlayout/resLOCAL_RESOURCE_DIR += frameworks/support/v7/recyclerview/reselseLOCAL_RESOURCE_DIR += prebuilts/sdk/current/support/design/resLOCAL_RESOURCE_DIR += prebuilts/sdk/current/support/v7/appcompat/resLOCAL_RESOURCE_DIR += prebuilts/sdk/current/support/v7/gridlayout/resLOCAL_RESOURCE_DIR += prebuilts/sdk/current/support/v7/recyclerview/resendifLOCAL_PACKAGE_NAME := SecretRobotLOCAL_CERTIFICATE := platformLOCAL_MODULE_TAGS := optionalLOCAL_SRC_FILES := $(call all-java-files-under, src gen)# 引入 JAR 包LOCAL_STATIC_JAVA_LIBRARIES := android-opt-datetimepickerLOCAL_STATIC_JAVA_LIBRARIES += messageformatLOCAL_STATIC_JAVA_LIBRARIES += android-support-designLOCAL_STATIC_JAVA_LIBRARIES += android-support-v13LOCAL_STATIC_JAVA_LIBRARIES += android-support-v4LOCAL_STATIC_JAVA_LIBRARIES += android-support-v7-appcompatLOCAL_STATIC_JAVA_LIBRARIES += android-support-v7-gridlayoutLOCAL_STATIC_JAVA_LIBRARIES += android-support-v7-recyclerview# 引入 AAR 包LOCAL_STATIC_JAVA_AAR_LIBRARIES := android-gif-drawableLOCAL_STATIC_JAVA_AAR_LIBRARIES += lib-dds# 引入 SO 包LOCAL_JNI_SHARED_LIBRARIES := libpl_droidsonroids_gifLOCAL_AAPT_FLAGS := --auto-add-overlayLOCAL_AAPT_FLAGS += --extra-packages android.support.designLOCAL_AAPT_FLAGS += --extra-packages android.support.v7.appcompatLOCAL_AAPT_FLAGS += --extra-packages android.support.v7.gridlayoutLOCAL_AAPT_FLAGS += --extra-packages android.support.v7.recyclerviewLOCAL_AAPT_FLAGS += --extra-packages com.android.datetimepickerLOCAL_AAPT_FLAGS += --extra-packages com.android.messageformat# 引入 AAR 包LOCAL_AAPT_FLAGS += --extra-packages pl.droidsonroids.gifLOCAL_AAPT_FLAGS += --extra-packages com.aispeech.dui.ddsLOCAL_PROGUARD_FLAG_FILES := ../../../frameworks/support/design/proguard-rules.proLOCAL_PROGUARD_FLAG_FILES += proguard-rules.proinclude $(BUILD_PACKAGE)# 引入 AAR 包文件路径include $(CLEAR_VARS)LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES := android-gif-drawable:libs/android-gif-drawable-1.1.9.aarLOCAL_PREBUILT_STATIC_JAVA_LIBRARIES += lib-dds:libs/lib-dds-1.1.8.1-release.aarinclude $(BUILD_MULTI_PREBUILT)# 引入 SO 包include $(CLEAR_VARS)LOCAL_MODULE_TAGS := optionalLOCAL_MODULE_SUFFIX := .soLOCAL_MODULE := libpl_droidsonroids_gifLOCAL_MODULE_CLASS := SHARED_LIBRARIESLOCAL_SRC_FILES_arm64 := jniLibs/arm64-v8a/libpl_droidsonroids_gif.soLOCAL_SRC_FILES_arm32 := jniLibs/armeabi-v7a/libpl_droidsonroids_gif.soLOCAL_MODULE_TARGET_ARCHS:= arm64 arm32LOCAL_MULTILIB := 64 32include $(BUILD_PREBUILT)include $(call all-makefiles-under, $(LOCAL_PATH))

常见问题总结

问题一 ：library "/system/lib64/libpl_droidsonroids_gif.so" ("/system/lib64/libpl_droidsonroids_gif.so") needed or dlopened by"/system/lib64/libpl_droidsonroids_gif.so" is not accessible for the namespace "classloader-namespace"解决方案 :方案一 :修改 system/core/rootdir/etc/public.libraries.android.txt将需要添加的 SO 库添加到该文件中重新编译系统镜像并下载安装方案二 :不用编译，直接在板子上修改，对应目录 /system/etc问题二 :ANDROID NATIVE 的 No implementation found for native 等类似问题说明，该问题主要是针对 libpl_droidsonroids_gif.so 产生的，android-gif-drawable.aar 与安卓 sdk 版本的兼容问题，需要下载适合于 SDK 的 android-gif-drawable.aar 版本

参考致谢

本博客为博主学习笔记，同时参考了网上众博主的博文以及相关专业书籍，在此表示感谢，本文若存在不足之处，请批评指正。

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