AlarmManager 全局鬧鐘

1：註冊鬧鐘服務

	public  void startPollingService(Context context, int seconds, Class<?> cls,String action) {
		//獲取AlarmManager系統服務
		AlarmManager manager = (AlarmManager) context
				.getSystemService(Context.ALARM_SERVICE);
		
		//包裝需要執行Service的Intent
		Intent intent = new Intent(context, cls); 
		intent.setAction(action);
		PendingIntent pendingIntent = PendingIntent.getService(context, 0,
				intent, PendingIntent.FLAG_UPDATE_CURRENT);
		
		//觸發服務的起始時間
		long triggerAtTime = SystemClock.elapsedRealtime();
		
		//使用AlarmManger的setRepeating方法設置定期執行的時間間隔（seconds秒）和需要執行的Service
		manager.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP , triggerAtTime,
				seconds * 1000, pendingIntent);
	}

2：編寫鬧鐘到點時啓動的服務

public class PollingService extends Service {
	@Override
	public IBinder onBind(Intent intent) {
		return null;
	}

	@Override
	public void onCreate() {
		
	}
	
	@Override
	public void onStart(Intent intent, int startId) {
		new PollingThread().start();
	}

	class PollingThread extends Thread {
		@Override
		public void run() {
			
		}
	}
	
	@Override
	public void onDestroy() {
		super.onDestroy();
		System.out.println("Service:onDestroy");
	}

}

或者廣播接收器

public class <span style="font-family: Arial, Helvetica, sans-serif;">PollingService</span><span style="font-family: Arial, Helvetica, sans-serif;">  extends BroadcastReceiver{  </span>
  
    @Override  
    public void onReceive(Context context, Intent intent) {  
        Log.i("通知", "收到了廣播");  
        // 可以在此處添加響鈴的代碼  
    }  
      
}   

3：停止鬧鐘服務

	public static void stopPollingService(Context context, Class<?> cls,String action) {
		AlarmManager manager = (AlarmManager) context
				.getSystemService(Context.ALARM_SERVICE);
		Intent intent = new Intent(context, cls);
		intent.setAction(action);
		PendingIntent pendingIntent = PendingIntent.getService(context, 0,
				intent, PendingIntent.FLAG_UPDATE_CURRENT);
		//取消正在執行的服務
		manager.cancel(pendingIntent);
	}