public class MainActivity extends AppCompatActivity $\{$

@override

protected void onCreate$($Bundle savedInstanceState$)\{$

super. onCreate$($saved InstanceS tate$)$;

setContentView$($R$.$ layout.activity$\_$main$)$;

findViewById$($R$.$ id$.$ button$),$ setOnCl ickListener$($new

android.view.View.OnClickListener$()\{$

@override public void onClick$($android$.$view.View view$)\{$

$\}\})$;

$\}$

$\}$