android 計時器+handler線程使用

android.os.Handler mHandler = new android.os.Handler();
private Runnable rn = new Runnable(){
public void run() {
   //處理事件 
  }
};

mHandler.postDelayed(rn, 2000);啓動線程
@Override
public void onDestroy() {
 super.onDestroy();
mHandler.removeCallbacks(rn);//中止線程
}