android 动画自动播放

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();}

在onCreate中执行 animDrawale.start() 动画并不执行。搞不懂啊

另外以上代码测试过有缺陷。例如在TabActivity中 onWindowFocusChanged只会执行一次

所以

AnimationDrawable ad;            @Override          public 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                }                            };

次方法试过确实可行。很好。

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