Android library use gradle build .apk / .aar / .jar

gistfile1.txt

////////////////////////////////
// import library (.aar / .jar)
////////////////////////////////
repositories {
    jcenter()
    mavenCentral()
    mavenLocal()
    flatDir{
        dirs 'libs'
    }
}

dependencies {
   // ...other library
   compile(name:'lib-debug', ext:'aar')
}

//////////////
// build .aar
/////////////
task copyAar(type : Copy){
    from('build/outputs/aar')
    include('**/*.aar')
    into('../app/libs/')
}

///////////////
// build .apk
//////////////
task copyApks(type: Copy) {
    from('build/outputs/apk') {
        exclude '**/*unsigned.apk', '**/*unaligned.apk'
    }
    into '../app/libs'
}

///////////////
// build .jar
//////////////
task createJar(type : Copy) {
    from('build/intermediates/bundles/release')
    into('libs/')
    include('classes.jar')
    rename('classes.jar', 'mylib.jar')
}

///////////////
// delete .jar
//////////////
task deleteJar(type : Delete) {
    delete 'libs/mylib.jar'
}

////////////////////////////////////
// build .jar before run build task
///////////////////////////////////
createJar.dependsOn(deleteJar, build)