如何在android.mk中的AOSP中包含.aar [英] How to include .aar in AOSP with android.mk

问题描述

我需要在aosp构建树中使用android.mk构建应用程序. 我有一个自定义的.arr库，它位于以下文件夹apps/libs/mylib.aar

I need to build an application with android.mk in aosp build tree. I have a custom .arr lib with me, Which resides in the following folder apps/libs/mylib.aar

任何人都可以告诉我如何将aar包含在android aosp版本中. 我已经尝试过此处描述的以下方法

Anyone can tell me how to include the aar in the android aosp build. I already tried the following methods described here Stackoverflow link for aosp build with .aar lib

Android.mk看起来像

Android.mk is looked like

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)

LOCAL_MODULE_TAGS  := optional
LOCAL_PACKAGE_NAME := sample
LOCAL_CERTIFICATE  := platform

# SRC files
#=====================================================================
LOCAL_AIDL_INCLUDES := $(LOCAL_PATH)/aidl
LOCAL_SRC_FILES := $(call all-java-files-under, src) \
                   $(call all-Iaidl-files-under, aidl)

# RES files
#=====================================================================
LOCAL_RESOURCE_DIR := $(LOCAL_PATH)/res
LOCAL_RESOURCE_DIR +=prebuilts/sdk/current/extras/constraint-layout/res
LOCAL_RESOURCE_DIR +=frameworks/support/v7/appcompat/res
LOCAL_RESOURCE_DIR +=frameworks/support/design/res
LOCAL_RESOURCE_DIR +=frameworks/support-v4/res

LOCAL_MANIFEST_FILE :=AndroidManifest.xml
LOCAL_USE_AAPT2 := true
LOCAL_PROGUARD_ENABLED := disabled

# static .aar files
#=====================================================================
LOCAL_STATIC_JAVA_AAR_LIBRARIES:= mylib.aar

#Adding aapt packages
#=====================================================================
LOCAL_AAPT_FLAGS := --auto-add-overlay

LOCAL_AAPT_FLAGS += --extra-packages android.support.v7.appcompat 
LOCAL_AAPT_FLAGS += --extra-packages android.support.v7.recyclerview
LOCAL_AAPT_FLAGS += --extra-packages android.support.annotations
LOCAL_AAPT_FLAGS += --extra-packages android.support.v4
LOCAL_AAPT_FLAGS += --extra-packages android.support.design
LOCAL_AAPT_FLAGS += --extra-packages com.sample.mylib

#Include Static libraries
#=====================================================================
LOCAL_STATIC_JAVA_LIBRARIES := android-support-v7-appcompat
LOCAL_STATIC_JAVA_LIBRARIES := android-support-v7-recyclerview
LOCAL_STATIC_JAVA_LIBRARIES += android-support-v4
LOCAL_STATIC_JAVA_LIBRARIES += android-support-v7-gridlayout
LOCAL_STATIC_JAVA_LIBRARIES += android-support-annotations
LOCAL_STATIC_JAVA_LIBRARIES += android-support-design
LOCAL_STATIC_JAVA_LIBRARIES += gson
LOCAL_STATIC_JAVA_LIBRARIES += zxing
LOCAL_STATIC_JAVA_LIBRARIES += picasso

#Set out path
#=====================================================================
LOCAL_MODULE_PATH := $(TARGET_OUT_VENDOR_APPS)

#For build the application package
#=====================================================================
include $(BUILD_PACKAGE)

include $(CLEAR_VARS)
LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES := mylib:libs/mylib.aar
LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES += gson:libs/gson-2.8.1.jar
LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES += zxing:libs/core-3.3.3.jar
LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES += picasso:libs/picasso.jar

include $(BUILD_MULTI_PREBUILT)

include $(call all-makefiles-under,$(LOCAL_PATH))

我检查了不同的方法来构建相同的东西.

I checked different approaches to build the same.

推荐答案

我知道我来晚了，但仍然值得分享此信息. AAPT2的LOCAL_STATIC_JAVA_AAR_LIBRARIES支持在某些时候被破坏了. 因此，即使您如上所述添加库，也不会链接来自aar的资源.

I know I am too late, but still worth sharing this information. LOCAL_STATIC_JAVA_AAR_LIBRARIES support of AAPT2 was broken at some point. So even if you add your library as descibed above, resources from aar would not be linked.

来自AOSP git历史记录:

from AOSP git history:

为2014年10月30日添加支持 将Aar解压缩到out/.../intermediates *目录中，并链接到aosp模块.

Oct 30, 2014 Add support for prebuilt AARs. Aars were unpacked into out/.../intermediates* dirs and linked to the aosp modules.

2015年12月5日支持使用APT2a构建 如您在 core/android_manifesta> mk中看到的: ，因此不再需要链接解压缩的aar，因为AAPT2支持直接链接到数组.

Dec 5, 2015 Support to build with AAPT2 As you can see in core/android_manifest.mk:26, linking unpacked aars was not necessary anymore, because AAPT2 supports linking directly into arrays.

但不幸的是，它们没有正确地添加为--extra-packages.

But unfortunately they were not added as --extra-packages correctly.

该错误已在 android-p-preview-5 中修复.

如果您仍在为Android 8或8.1进行开发，请手动添加这些更改或在您的树中挑选它们.对我来说很完美.

If you are still developing for android 8 or 8.1 please add these changes manually or cherry-pick them in your tree. Worked perfectly for me.

UPD 2018-11-28

修复针对Android 8.1及更低版本的确切步骤:

Exact steps to fix it for android 8.1 and earlier:

1)cherry-pick fix 2015年12月5日，支持从aosp使用AAPT2 进行构建

1) cherry-pick fix Dec 5, 2015 Support to build with AAPT2 from aosp

2)在build/core/prebuilt_internal.mk:593中添加参数--auto-add-overlay

2) in build/core/prebuilt_internal.mk:593 add parameter --auto-add-overlay

$(my_res_package): PRIVATE_AAPT_FLAGS := --static-lib --no-static-lib-packages --auto-add-overlay

3)由于RenderScript在以后进行了重构，因此您必须明确定义aar模块:

3) As RenderScript was refactored much later, you have to define your aar module explicitly:

include $(CLEAR_VARS)
LOCAL_MODULE := my-library-module
LOCAL_MODULE_TAGS := optional
LOCAL_SRC_FILES := my-library-module.aar
# Provide resources directory in order to compile them, enable AAPT2 for this module
LOCAL_RESOURCE_DIR := $(call intermediates-dir-for,JAVA_LIBRARIES,$(LOCAL_MODULE),,COMMON)/aar/res)
LOCAL_USE_AAPT2 := true
# if LOCAL_RENDERSCRIPT_TARGET_API >= 21, resources won't get compiled. Shouldn't affect anything else
LOCAL_RENDERSCRIPT_TARGET_API := 20
LOCAL_MODULE_CLASS := JAVA_LIBRARIES
LOCAL_MODULE_SUFFIX := $(COMMON_JAVA_PACKAGE_SUFFIX)
LOCAL_BUILT_MODULE_STEM := javalib.jar
LOCAL_UNINSTALLABLE_MODULE := true
include $(BUILD_PREBUILT)

免责声明:这是一种对我有用的hacky解决方法.由于时间不足，并且迫切需要支持较旧的客户端版本，因此我可能错过了一些用例.

Disclaimer: this is rather a hacky workaround that worked for me. Due to lack of time and urgent need to support older client versions, I may have missed some use cases.

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