androidStudio使用自定义Android.mk文件

找了好久，总算找到一个正确的使用Android.mk文件的方式

修改app/build/build.gradle 为以下内容，apply plugin: 'com.android.application'

android {
compileSdkVersion 23
buildToolsVersion "23.0.3"
defaultConfig {
applicationId "com.cc.jniTest"
minSdkVersion 15
targetSdkVersion 24
versionCode 1
versionName "1.0"
}

buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}

sourceSets.main.jni.srcDirs = [] //禁用自带编译ndk功能
sourceSets.main.jniLibs.srcDir 'src/main/libs'
}

dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
}

tasks.withType(JavaCompile) {
compileTask -> compileTask.dependsOn ndkBuild
}

task ndkBuild(type: Exec) {
workingDir file('src/main/jni')
commandLine getNdkBuildCmd()
}

task cleanNative(type: Exec){
workingDir file('src/main/jni')
commandLine getNdkBuildCmd(), 'clean'
}

clean.dependsOn cleanNative

def getNdkDir() {
if (System.env.ANDROID_NDK_ROOT != null)
return System.env.ANDROID_NDK_ROOT
Properties properties = new Properties()
properties.load(project.rootProject.file('local.properties').newDataInputStream())
def ndkdir = properties.getProperty('ndk.dir', null)
if (ndkdir == null)
throw new GradleException("NDK location not found. Define location with ndk.dir in the local.properties file or with an ANDROID_NDK_ROOT environment variable.")
return ndkdir
}

def getNdkBuildCmd() {
def ndkbuild = getNdkDir() + "/ndk-build"
ndkbuild += ".cmd"
return ndkbuild
}

如果还是不行，直接cmd命令编译so吧，先把ndk目录添加至系统环境变量，到jni目录下执行ndk-build