gradle ndk build

build.gradle

/////////////
// NDK Support
//////////////
// If using this, Android studio will fail run the following to set the environment variable for android studio:
// export ANDROID_NDK_HOME=/Android/android-ndk-r8e (Linux)
// launchctl setenv ANDROID_NDK_HOME /Android/android-ndk-r8e (Mac)
// or, better, add the export to the .profile of your user home and re-login
task copyNativeLibs(type: Copy, dependsOn: 'buildNative') {
    from(new File('src/main/libs')) { include '**/*.so' }
    into new File(buildDir, 'native-libs')
}

// TODO fix deprecated
tasks.withType(JavaCompile) { compileTask -> compileTask.dependsOn copyNativeLibs }

clean.dependsOn 'cleanCopyNativeLibs'

tasks.withType(com.android.build.gradle.tasks.PackageApplication) { pkgTask ->
    pkgTask.jniDir new File(buildDir, 'native-libs')
}

task buildNative(type: Exec, dependsOn: "ndkCheck") {
    def ndkBuild;
    def ndkBuildingDir = new File("src/main/jni");
//    def ndkSourcesDir = new File(ndkBuildingDir, "jni")
//    def ndkOutputDir = new File(buildDir, 'native-libs')
    ndkBuild = new File("$System.env.ANDROID_NDK_HOME", 'ndk-build')

//    inputs.files fileTree(ndkSourcesDir)
//    outputs.dir ndkOutputDir
    commandLine ndkBuild, "--directory", ndkBuildingDir

}

task cleanNative(type: Exec, dependsOn: "ndkCheck") {
    def ndkBuild;
    def ndkBuildingDir = new File("src/main/jni");
    ndkBuild = new File("$System.env.ANDROID_NDK_HOME", 'ndk-build')
    commandLine ndkBuild, "--directory", ndkBuildingDir, "clean"
}

task ndkCheck {
    def hasNdk = false;
    if (System.getenv("ANDROID_NDK_HOME") != null) {
        hasNdk = true;
    }
    def home = "${System.env.ANDROID_NDK_HOME}"
    if (home != null) {
        hasNdk = true;
        println home
        println System.getenv()['JAVA_HOME']
        println System.getenv()['ANDROID_HOME']
        logger.error('##################')
    }
    if (!hasNdk) {
        logger.error('##################')
        logger.error("Failed NDK build")
        logger.error('Reason: Reason: ANDROID_NDK_HOME not set.')
        logger.error('##################')
    }
    assert hasNdk: "ANDROID_NDK_HOME not set."
}

clean.dependsOn 'cleanNative'