The code of calling four animation effects on Android

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public class myActionAnimation extends Activity implements OnClickListener {
/** Called when the activity is first created. */
private Button button_alpha;
private Button button_scale;
private Button button_translate;
private Button button_rotate;
private Animation myAnimation_Alpha;
private Animation myAnimation_Scale;
private Animation myAnimation_Translate;
private Animation myAnimation_Rotate;
@Override
public void onCreate(Bundle savedInstanceState) {
(savedInstanceState);
setContentView();

button_alpha = (Button) findViewById(.button_Alpha);
button_alpha.setOnClickListener(this);

button_scale = (Button) findViewById(.button_Scale);
button_scale.setOnClickListener(this);

button_translate = (Button) findViewById(.button_Translate);
button_translate.setOnClickListener(this);

button_rotate = (Button) findViewById(.button_Rotate);
button_rotate.setOnClickListener(this);
}
public void onClick(View button) {
// TODO Auto-generated method stub
switch (()) {
case .button_Alpha: {
myAnimation_Alpha = (this,.my_alpha_action);
button_alpha.startAnimation(myAnimation_Alpha);
}
break;
case .button_Scale: {
myAnimation_Scale= (this,.my_scale_action);
button_scale.startAnimation(myAnimation_Scale);
}
break;
case .button_Translate: {
myAnimation_Translate= (this,.my_translate_action);
button_translate.startAnimation(myAnimation_Translate);
}
break;
case .button_Rotate: {
myAnimation_Rotate= (this,.my_rotate_action);
button_rotate.startAnimation(myAnimation_Rotate);
}
break;

default:
break;
}
}
}