Script to copy .apk and mapping file to /deploy/v+versionCode+versionName location. Helps to save apk with corresponding mapping file.

build.gradle

android {
    applicationVariants.all { variant ->
        def apk
        def deployPath
        variant.outputs.each { output ->
            if (output.outputFile?.name?.contains('release')) {
                apk = output.outputFile
            }
        }
        if (variant.getBuildType().isMinifyEnabled()) {
            variant.assemble.doLast {
                copy {
                    from variant.mappingFile
                    from apk
                    deployPath = "${rootDir}/deploy/v" + variant.versionCode + '_' + variant.versionName
                    println deployPath
                    into deployPath
                }
                if (System.properties['os.name'].toLowerCase().contains('windows')) {
                    deployPath = deployPath.replaceAll("/", "\\\\")
                    Runtime.getRuntime().exec("explorer.exe " + deployPath);
                }
            }
        }
    }
}