Android源码分析（十一）-----Android源码中如何引用aar文件

一：aar文件如何引用

系统Settings中引用bidehelper-1.1.12.aar 文件为例

源码地址：packages/apps/Settings/Android.mk

LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_SRC_FILES := \
        $(call all-logtags-files-under, src)
LOCAL_MODULE := settings-logtags
include $(BUILD_STATIC_JAVA_LIBRARY)
# Build the Settings APK
include $(CLEAR_VARS)
LOCAL_PACKAGE_NAME := Settings
LOCAL_CERTIFICATE := platform
LOCAL_PRIVILEGED_MODULE := true
LOCAL_MODULE_TAGS := optional
LOCAL_USE_AAPT2 := true
LOCAL_SRC_FILES := $(call all-java-files-under, src)
LOCAL_STATIC_ANDROID_LIBRARIES := \
    android-support-v4 \
    android-support-v13 \
    android-support-v7-appcompat \
    android-support-v7-cardview \
    android-support-v7-preference \
    android-support-v7-recyclerview \
    android-support-v14-preference
LOCAL_JAVA_LIBRARIES := \
    bouncycastle \
    core-oj \
    telephony-common \
    ims-common \
    telephony-ext
LOCAL_STATIC_JAVA_LIBRARIES := \
    jsr305 \
    settings-logtags
+	LOCAL_STATIC_JAVA_AAR_LIBRARIES ：= bide_helper
+	LOCAL_AAPT_FLAGS := \
+      --auto-add-overlay \
+      --extra-packages com.blackberry.bidehelper
LOCAL_PROGUARD_FLAG_FILES := proguard.flags
ifneq ($(INCREMENTAL_BUILDS),)
    LOCAL_PROGUARD_ENABLED := disabled
    LOCAL_JACK_ENABLED := incremental
    LOCAL_JACK_FLAGS := --multi-dex native
endif
include frameworks/opt/setupwizard/library/common-gingerbread.mk
include frameworks/base/packages/SettingsLib/common.mk
include $(BUILD_PACKAGE)
+	include $(CLEAR_VARS)
+	LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES := \
+          bide_helper:libs/bidehelper-1.1.12.aar
+	include $(BUILD_MULTI_PREBUILT)
# Use the following include to make our test apk.
ifeq (,$(ONE_SHOT_MAKEFILE))
include $(call all-makefiles-under,$(LOCAL_PATH))
endif

主要代码如下：

#名称可以随便写
LOCAL_STATIC_JAVA_AAR_LIBRARIES ：= bide_helper
#写入aar文件中的包名
LOCAL_AAPT_FLAGS := \
  --auto-add-overlay \
  --extra-packages com.blackberry.bidehelper

aar文件中的包名可以用压缩工具直接打开，查看AndroidManifest.xml文件

  <?xml version="1.0" encoding="utf-8" ?>
- <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.blackberry.bidehelper" android:versionCode="1" android:versionName="1.0.0.219">
  <uses-sdk android:minSdkVersion="21" android:targetSdkVersion="26" />
  <application android:allowBackup="false" android:label="@string/app_name" android:supportsRtl="true" />
  </manifest>

include $(CLEAR_VARS)
#构建静态java库
LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES := \
    bide_helper:libs/bidehelper-1.1.12.aar
include $(BUILD_MULTI_PREBUILT)

编译后文件生成路径：out\target\product\msm8909\obj\JAVA_LIBRARIES

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喜欢源码分析系列可参考其他文章：

Android源码分析（一）-----如何快速掌握Android编译文件

Android源码分析（二）-----如何编译修改后的framework资源文件

Android源码分析（三）-----系统框架设计思想

Android源码分析（四）-----Android源码编译及刷机步骤

Android源码分析（五）-----如何从架构师的角度去设计Framework框架