Android在onCreat方法例运行帧动画卡在第一帧的简洁解

由于今天需要在开启软件时运行帧动画，便将代码放在了onCreate方法里，结果运行卡在了第一帧。

原代码如下：

protected void onCreate(Bundle savedInstanceState) {  
       super.onCreate(savedInstanceState);  
       setContentView(R.layout.activity_main);  
  
       final ImageView iv = findViewById(R.id.iv);  
  
       iv.setBackgroundResource(R.drawable.myan);  
  
       final AnimationDrawable animationDrawable= (AnimationDrawable) iv.getBackground();  
  
       new Thread(new Runnable() {  
           @Override  
           public void run() {  
               SystemClock.sleep(20);  
  
  
               animationDrawable.start();  
  
           }  
       }).start();  
  
  
   }  

将new Thread()改成iv.post()即可，如下：

@Override  
   protected void onCreate(Bundle savedInstanceState) {  
       super.onCreate(savedInstanceState);  
       setContentView(R.layout.activity_main);  
         
       final ImageView iv = findViewById(R.id.iv);  
  
       iv.setBackgroundResource(R.drawable.myan);  
  
    
       final AnimationDrawable animationDrawable= (AnimationDrawable) iv.getBackground();  
        
        //这里修改
       iv.post(new Runnable() {  
           @Override  
           public void run() {  
               SystemClock.sleep(20);  
  
  
               animationDrawable.start();  
  
           }  
       });  
  
  
   }  

成功运行。