Android编程实现动画自动播放功能

private ImageView image;private AnimationDrawable animDrawable = new AnimationDrawable();@Overridepublic void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.table_title);    image = (ImageView) this.findViewById(R.id.scrollView);    //代码实现//   for(int i=0; i<16; i++){//     int id = getResources().getIdentifier("load_"+(i+1), "drawable", getPackageName());//     animDrawable.addFrame(getResources().getDrawable(id), 50);//   }//   animDrawable.setOneShot(false);//   image.setBackgroundDrawable(animDrawable);    animDrawable = (AnimationDrawable) image.getBackground();}@Overridepublic void onWindowFocusChanged(boolean hasFocus) {    super.onWindowFocusChanged(hasFocus);    animDrawable.start();}

AnimationDrawable ad;@Overridepublic void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.main);    ImageView iv = (ImageView) findViewById(R.id.animation_view);    iv.setBackgroundResource(R.drawable.animation);    ad = (AnimationDrawable) iv.getBackground();   //关键代码   iv.getViewTreeObserver().addOnPreDrawListener(opdl);}OnPreDrawListener opdl=new OnPreDrawListener(){    @Override    public boolean onPreDraw() {        if(ad.isRunning() == false){        ad.start();        }        return true; //注意必须返回true    }};