Android...ถ้าเราจะเขียน Event ดัก ตัว Service and Schedule จะทำยังไงมีวิธีการทำยังไงบอกทีครับ ขอบคุณครับ

public class TimeService extends Service {
	// constant
	public static final long NOTIFY_INTERVAL = 10 * 1000; // 10 seconds

	// run on another Thread to avoid crash
	private Handler mHandler = new Handler();
	// timer handling
	private Timer mTimer = null;

	@Override
	public IBinder onBind(Intent intent) {
		return null;
	}

	@Override
	public void onCreate() {
		// cancel if already existed
		if(mTimer != null) {
			mTimer.cancel();
		} else {
			// recreate new
			mTimer = new Timer();
		}
		// schedule task
		mTimer.scheduleAtFixedRate(new TimeDisplayTimerTask(), 0, NOTIFY_INTERVAL);
	}

	class TimeDisplayTimerTask extends TimerTask {

		@Override
		public void run() {
			// run on another thread
			mHandler.post(new Runnable() {

				@Override
				public void run() {
					// display toast
					Toast.makeText(getApplicationContext(), getDateTime(),
							Toast.LENGTH_SHORT).show();
				}

			});
		}

		private String getDateTime() {
			// get date time in custom format
			SimpleDateFormat sdf = new SimpleDateFormat("[yyyy/MM/dd - HH:mm:ss]");
			return sdf.format(new Date());
		}

	}