// 在onCreate()中開啟線程
new Thread(new GameThread()).start();

// 實例化一個handler
Handler myHandler = new Handler() {
 //接收到消息后處理
 public void handleMessage(Message msg) {
  switch (msg.what) {
  case Activity01.REFRESH:
   mGameView.invalidate();//刷新界面
   break;
  }
  super.handleMessage(msg);
 }                 
};

class GameThread implements Runnable {
 public void run() {
     while (!Thread.currentThread().isInterrupted()) {
         Message message = new Message();
            message.what = Activity01.REFRESH;
            //發送消息
            Activity01.this.myHandler.sendMessage(message);
            try {
             Thread.sleep(100);
            }
            catch (InterruptedException e) {
             Thread.currentThread().interrupt();
            }
  }
 }
}

class GameThread implements Runnable {
 public void run() {
  while (!Thread.currentThread().isInterrupted()) {
   try {
    Thread.sleep(100);
   }
            catch (InterruptedException e) {
    Thread.currentThread().interrupt();
   }

   // 使用postInvalidate可以直接在線程中更新界面
   mGameView.postInvalidate();
  }
 }
}