Android Timer定时器

public static Timer mTimer;// 定时器

// 开启定时器
		if (mTimer == null) {
			mTimer = new Timer();
			timerTask(); // 定时执行
		}

public static void timerTask() {

		mTimer.schedule(new TimerTask() {

			@Override
			public void run() {
                                    mHandler.sendEmptyMessage(1);// 向Handler发送消息
                         }			

		}, 0, 3*60000);// 3分钟执行1次定时任务

	}

private Handler mHandler = new Handler() {

		@Override
		public void handleMessage(Message msg) {

			// TODO Auto-generated method stub
			switch (msg.what) {
			case 1:
				System.out.println("Handler --> ID IS "
						+ Thread.currentThread().getId());// Handler处于UI线程中,更新界面的操作在此处执行
				
				break;
			
			}
			super.handleMessage(msg);
		}
	};