gistfile1.txt

task archiveApks {
    description = "Copies APKs and mapping files to the archive directory"
    doLast {
        def appName = "${rootProject.name}"
        def versionDir = android.defaultConfig.versionName + "-" + android.defaultConfig.versionCode

        copy {
            from fileTree(dir: 'build/outputs/apk').files
            into 'build/archive'
            include '*.apk'
            rename('app-(.*)\\.apk', "${appName}-${versionDir}-\$1.apk")
        }

        copy {
            from 'build/outputs/mapping'
            into 'build/archive/mapping'
        }
    }
}
archiveApks.mustRunAfter assemble