Android Studio 打包AAR和第三方靜態庫

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需求

現在有一個第三方庫libstatic_add.a和對應的標頭檔static.h，要求封裝一個Module，該Module依賴這個靜態庫，要求打包的Module包含該靜態庫。

方案建立Android Studio Library  Project

建立Project時，記得添加"Include C++ Support"，如果沒有安裝CMake，LLDB和NDK的話，記得安裝一下。

項目建立好後，包括以下目錄和檔案（部分目錄或檔案是後面添加的）：

build.gradle配置

 針對app模組的build.gradle進行如下配置：

//改為libraryapply plugin: ‘com.android.library‘//讀取local.properties裡的配置屬性add_static_lib.dir，該屬性指明libstatic_add.a靜態庫所在目錄Properties properties = new Properties()properties.load(project.rootProject.file(‘local.properties‘).newDataInputStream())def add_static_lib = properties.getProperty(‘add_static_lib.dir‘)android {    compileSdkVersion 27    defaultConfig {        minSdkVersion 16        targetSdkVersion 27        versionCode 1        versionName "1.0"        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"        //添加下面        ndk {            abiFilters ‘armeabi-v7a‘            // these platforms cover 99% percent of all Android devices        }        externalNativeBuild {            cmake {               //添加下面                arguments ‘-DANDROID_PLATFORM=android-14‘,                        ‘-DANDROID_TOOLCHAIN=clang‘,                        ‘-DANDROID_ARM_NEON=TRUE‘,                        ‘-DANDROID_STL=gnustl_static‘,                        "-DPATH_TO_ADD_STATIC_LIB:STRING=${add_static_lib}"                cFlags ‘-O3‘, ‘-fsigned-char‘ // full optimization, char data type is signed                cppFlags ‘-fsigned-char‘, "-I${add_static_lib}"            }        }    }    //添加下面    sourceSets {        main {            jniLibs.srcDirs = [‘src/main/cpp‘]        }    }    //添加下面    externalNativeBuild {        cmake {            path ‘src/main/cpp/CMakeLists.txt‘        }    }    //添加下面    sourceSets.main {        jni.srcDirs = []        jniLibs.srcDir ‘src/main/libs‘    }    buildTypes {        release {            minifyEnabled false            proguardFiles getDefaultProguardFile(‘proguard-android.txt‘), ‘proguard-rules.pro‘        }    }}dependencies {    implementation fileTree(dir: ‘libs‘, include: [‘*.jar‘])    implementation ‘com.android.support:appcompat-v7:27.1.1‘    implementation ‘com.android.support.constraint:constraint-layout:1.1.0‘    implementation ‘com.android.support:design:27.1.1‘    testImplementation ‘junit:junit:4.12‘    androidTestImplementation ‘com.android.support.test:runner:1.0.2‘    androidTestImplementation ‘com.android.support.test.espresso:espresso-core:3.0.2‘}

local.properties配置

針對app模組的local.propertise進行如下配置：

## This file must *NOT* be checked into Version Control Systems,# as it contains information specific to your local configuration.## Location of the SDK. This is only used by Gradle.# For customization when using a Version Control System, please read the# header note.#Wed May 16 13:05:05 CST 2018ndk.dir=D\:\\NanRi\\Android\\android-ndk-r16bsdk.dir=C\:\\Users\\suning\\AppData\\Local\\Android\\Sdk//添加如下，指明libstatic_add.a靜態庫所在目錄

add_static_lib.dir=D\:\\NanRi\\Android\\Android-Studio-Project\\ModuleProject\\app\\src\\main\\libs\\

CMakeLists.txt配置

針對app模組下的src\main\cpp\CMakeLists.txt配置如下：

cmake_minimum_required(VERSION 3.4.1)set(     PATH_TO_ADD_STATIC_LIB     CACHE STRING "")message(${ANDROID_ABI})file(GLOB CPP_FILES "*.cpp")add_library(     native-lib     SHARED     ${CPP_FILES})include_directories(src/main/cpp)include_directories(${PATH_TO_ADD_STATIC_LIB})target_link_libraries(    native-lib    android    OpenSLES    ${PATH_TO_ADD_STATIC_LIB}/libstatic_add.a)

 

匯出AAR

匯出的AAR所在路徑為“app\build\outputs\aar\app-debug.aar”

可以將app-debug.aar改為app-debug.zip，使用壓縮公用程式開啟，可以看到如下：

開啟jni檔案夾，可以看到裡麵包含了一個armeabi-v7a檔案夾，該檔案夾包含了libnative-lib.so庫

 

 

Android Studio 打包AAR和第三方靜態庫