按钮的四种监听方法

<Button
android:id="@+id/btn_alphy"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="透明度动画效果"
android:onClick="click"
/>

public void click(View view) {
if (view.getId() == R.id.btn_alphy) {
animation_alpha = AnimationUtils.loadAnimation(this, R.anim.alpha_anim);
imageview.startAnimation(animation_alpha);
}
}

public class MainActivity extends Activity implements OnClickListener {

btn_rotate.setOnClickListener(this);

@Override
public void onClick(View v) {
animation_rotate = AnimationUtils.loadAnimation(this, R.anim.rotate_anim);
imageview.startAnimation(animation_rotate);

}

btn_translate.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
animation_translate = AnimationUtils.loadAnimation(MainActivity.this, R.anim.transalte);
imageview.startAnimation(animation_translate);
}
});

private class MyOnClickListener implements OnClickListener {

@Override
public void onClick(View v) {
animation_scale = AnimationUtils.loadAnimation(MainActivity.this, R.anim.scale_anim);
imageview.startAnimation(animation_scale);
}
}