Android動畫可繪製的創建和循環

我想創建一個動畫可繪製，它只會有兩個框架和循環在屏幕上。Android動畫可繪製的創建和循環

但是，由於某種原因，我的Animationdrawable沒有做，甚至一個圓形，只是顯示第一幀，更不用說循環...

這裏是我的代碼：

Handler handler = new Handler(); 
AnimationDrawable mouseani = new AnimationDrawable(); 
ImageView img; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
    Drawable mouse1 = getResources().getDrawable(R.drawable.mouse_for_use); 
    Drawable mouse2 = getResources().getDrawable(R.drawable.mouse_for_use_2); 
    mouseani.addFrame(mouse1, 500); 
    mouseani.addFrame(mouse2, 500); 
    img = (ImageView) findViewById(R.id.imgView); 
    img.setBackgroundDrawable(mouseani); 
    mouseani.setCallback(img); 
    mouseani.setVisible(true, true); 
    mouseani.start(); 
    mouseani.stop(); 
}

謝謝！

來源

2012-05-11 arielschon12