就像Button控制元件有監聽器一樣，動畫效果也有監聽器，只需要實現AnimationListener就可以實現對動畫效果的監聽，其中需要過載三個函式，就是下面的這幾個函式：

private class MyListenr implements AnimationListener{  @Override  public void onAnimationEnd(Animation arg0) {   // TODO Auto-generated method stub  }  @Override  public void onAnimationRepeat(Animation arg0) {   // TODO Auto-generated method stub
 
  }  @Override  public void onAnimationStart(Animation arg0) {   // TODO Auto-generated method stub  }   }

下面我實現了一個例子，點選刪除按鈕，圖片慢慢淡去，並最終刪除，當點選新增按鈕時向viewGroup中新增一個imageview，實現的截圖如下：

具體的實現程式碼如下：

public class MainActivity extends Activity
 
 { private Button button; private Button button2; private ImageView imageView; private ViewGroup viewGroup; @Override protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);  button=(Button)findViewById(R.id.button_add);  button2=(Button)findViewById(R.id.button_delete);  imageView=(ImageView)findViewById(R.id.imageView1);  viewGroup=(ViewGroup)findViewById(R.id.viewGroup);  button.setOnClickListener(new
 
 Mybutton());  button2.setOnClickListener(new Mybutton()); } private class Mybutton implements OnClickListener{  @Override  public void onClick(View v) {   // TODO Auto-generated method stub   switch (v.getId()) {   case R.id.button_add:    Add();    break;   case R.id.button_delete:    Delete();    break;   default:    break;   }  } }  public void Add() {  AlphaAnimation alphaAnimation=new AlphaAnimation(0.0f, 1.0f);  alphaAnimation.setDuration(2000);  alphaAnimation.setStartOffset(500);  ImageView imageViewAdd=new ImageView(MainActivity.this);  imageViewAdd.setImageResource(R.drawable.ic_launcher);  viewGroup.addView(imageViewAdd);//  viewGroup.addView(imageViewAdd, new LayoutParams(//    LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT));  imageViewAdd.startAnimation(alphaAnimation); } public void Delete() {  AlphaAnimation alphaAnimation=new AlphaAnimation(1.0f, 0.0f);  alphaAnimation.setDuration(2000);  alphaAnimation.setStartOffset(500);  imageView.startAnimation(alphaAnimation);  alphaAnimation.setAnimationListener(new MyListenr()); }  private class MyListenr implements AnimationListener{  @Override  public void onAnimationEnd(Animation arg0) {   // TODO Auto-generated method stub   viewGroup.removeView(imageView);   Log.d("BruceZhang", "Animation End!");  }  @Override  public void onAnimationRepeat(Animation arg0) {   // TODO Auto-generated method stub   Log.d("BruceZhang", "Animation Repeat!");  }  @Override  public void onAnimationStart(Animation arg0) {   // TODO Auto-generated method stub   Log.d("BruceZhang", "Animation Start!");  }   } @Override public boolean onCreateOptionsMenu(Menu menu) {  // Inflate the menu; this adds items to the action bar if it is present.  getMenuInflater().inflate(R.menu.activity_main, menu);  return true; }}

<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context=".MainActivity"     android:id="@+id/viewGroup"    >        <Button        android:id="@+id/button_add"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_x="0dp"        android:layout_y="367dp"        android:text="新增圖片" />    <Button        android:id="@+id/button_delete"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_x="0dp"        android:layout_y="410dp"        android:text="刪除圖片" />    <ImageView        android:id="@+id/imageView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_x="153dp"        android:layout_y="155dp"        android:src="@drawable/ic_launcher" /></AbsoluteLayout>