Gradle build files for Android native library development

build.gradle

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.6.+'
    }
}
apply plugin: 'android'

repositories {
    mavenCentral()
}

android {
    compileSdkVersion 18
    buildToolsVersion "18.0.1"

    defaultConfig {
        minSdkVersion 7
        targetSdkVersion 19
    }
}

dependencies {
    compile 'com.android.support:appcompat-v7:+'
    compile fileTree(dir: 'libs', include: '*.jar')
}

task packageNativeLibs_ARM(type: Jar) {
    baseName 'libtestlib'
    classifier 'armeabi'
    from(file('libs/armeabi/')) {
        include '**/*.so'
    }
    into('lib/armeabi')
    destinationDir(file('libs/'))
}

task packageNativeLibs_x86(type: Jar) {
    baseName 'libtestlib'
    classifier 'x86'
    from(file('libs/x86/')) {
        include '**/*.so'
    }
    into('lib/x86')
    destinationDir(file('libs/'))
}

task packageNativeLibs(description: "package native libraries") {

}

packageNativeLibs.dependsOn 'packageNativeLibs_ARM'
packageNativeLibs.dependsOn 'packageNativeLibs_x86'

task ndkBuild(type: Exec, description: "Task to run ndk-build") {
    commandLine ndkDir + '/ndk-build'
}

packageNativeLibs.dependsOn 'ndkBuild'

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

clean.dependsOn 'cleanPackageNativeLibs'

gradle.properties

# properties file

# set your NDK code path here:
ndkDir=/Users/user/android-ndk