Android 的Timer 一般如下面所写

Timer timer = new Timer();  TimerTask task = new TimerTask() {      public void run() {          Message message = new Message();          message.what = 1;          handler.sendMessage(message);        }    };  

final Handler handler = new Handler() {        public void handleMessage(Message msg) {          switch (msg.what) {          case 1:              Log.e("Timer", "Timer");              update();              break;          }          super.handleMessage(msg);      }    };  

protected void onDestroy() {      if (timer != null) {          timer.cancel();          timer = null;      }      super.onDestroy();  }  

最重要一点是timer.schedule(task, 1000, 5000);如果设置为timer.schedule(task, 5000)是不会工作的。

protected void onCreate(Bundle savedInstanceState) {      super.onCreate(savedInstanceState);      this.setContentView(R.layout.main);                                 timer.schedule(task, 1000, 5000);                  }  

但更好的方法是通过下面的代码

private Handler handler = new Handler();    private Runnable runnable = new Runnable() {        public void run() {          update();          handler.postDelayed(this, 1000);      }    };  

开始Timer

handler.postDelayed(runnable, 1000);  

停止Timer

handler.removeCallbacks(runnable);