android延时更新UI

private final Handler mHandler = new Handler() {
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case :
                    //定义自己的消息事件
                    break;
                
                default:
                    break;
            }
        }
    };
/*延时200ms更新UI*/
mHandler.postDelayed(new Runnable() {
                @Override
                public void run() {
                   // 更新UI
                	mTextView.setText("延时200ms后更新UI");
                }
            }, 200);