The android gradle plugin version 2.4.0-alpha7 is too old, please update to the latest version.

private ServiceConnection mConnection = new ServiceConnection() {

        @Override
        public void onServiceConnected(ComponentName className,
                IBinder service) {
            // We've bound to LocalService, cast the IBinder and get LocalService instance
            LocalBinder binder = (LocalBinder) service;
            mService = binder.getService();
            mBound = true;
        }

        @Override
        public void onServiceDisconnected(ComponentName arg0) {
            mBound = false;
        }
    };

private val connection = object : ServiceConnection() {

    override fun onServiceConnect() { ... } 
    override fun onServiceDisconnected() { ... }
}