Android: How to change specific name of the generated apk file in Android Studio?

Question

By default IDE genarate a apk like app-debug.apk or app-release.apk file but I need to generate specific name of the Apk of the Ap

Answer 1

For Android Studio 3.1 this works for me:

android {
     ...............
     ...............

     applicationVariants.all { variant ->
            changeAPKName(variant, defaultConfig)
        }

  compileOptions {
       sourceCompatibility JavaVersion.VERSION_1_8
       targetCompatibility JavaVersion.VERSION_1_8
       }

      .................................
      .................................
     }

and

def changeAPKName(variant, defaultConfig) {
    variant.outputs.all { output ->
        outputFileName = new File("xxxxx" + variant.versionName +".apk")
    }
}