C++学习（四四零）android studio如何关联cmake

Posted 2021-12-29 hankern

1、安装cmake，会安装在android sdk目录下

Tools > Android > SDK Manager　　点击 SDK Tools 标签   选中CMake 框

也可以把下载好的cmake放到该目录下。 

2、在local.properties中设置cmake路径

ndk.dir=D\\:\\\\android-ndk-r19c
sdk.dir=D\\:\\\\android-sdk-windows
#cmake.dir=D\\:\\\\android-sdk-windows\\\\cmake\\\\3.12.0\\\\bin
cmake.dir=D\\:\\\\android-sdk-windows\\\\cmake\\\\3.12.0

3、在android studio工程中设置选用的cmake

修改module的build.gradle，设置cmake版本

apply plugin: 'com.android.application'

android 
    compileSdkVersion 28
    buildToolsVersion "28.0.3"
    defaultConfig 
        applicationId "com.example.testnativecplusplus"
        minSdkVersion 28
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
        externalNativeBuild 
            cmake 
                cppFlags ""
                abiFilters "arm64-v8a"
            
        
    
    buildTypes 
        release 
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        
    
    externalNativeBuild 
        cmake 
            path "src/main/cpp/CMakeLists.txt"
            //version "3.10.2"
            version "3.12.0"
        
    


dependencies 
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'androidx.appcompat:appcompat:1.0.2'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test.ext:junit:1.1.0'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'

/*
dexOptions 
//使用增量模式构建
    incremental true
//最大堆内存
    javaMaxHeapSize "8g"
//是否支持大工程模式
    jumboMode = true
//预编译
    preDexLibraries = true
//线程数
    threadCount = 8

*/