为了使用这样的服务，根据时间来创建的通知（机器人）

Question

I have a database in which the user saves the things that he wants to do.In each thing he can set a date of expiration.the point is, I want to create a list(notification list) where the "things to do" that are going to expire will appear. for example the user wants to create a list with the things that are going to expire in two days. I have used the IntentService and pass with the intent the time that the user selects each time but i get nothing. do I have to use service or bound service in this case? thank you in advance

Answer 1

you can use AlarmManager class to fire off events at given times and in these events you can use NotificationManager to trigger the notifications.

See alarm manager example here: Alarm Manager Example

See notifications guide here: https://developer.android.com/guide/topics/ui/notifiers/notifications.html

Answer 2

Use the AlarmManager technique as like,..

    AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
    Calendar calendar = Calendar.getInstance();
    calendar.set(Calendar.YEAR, yearFromDB);
    calendar.set(Calendar.MONTH, monthFromDB);
    calendar.set(Calendar.DAY_OF_MONTH, dateFromDB);
    calendar.set(Calendar.HOUR_OF_DAY, hourFromDB);
    calendar.set(Calendar.MINUTE, minuteFromDB);
    calendar.set(Calendar.SECOND, 0);

Use PendingIntent for the Wake up at the Specific time and perform this Task..

    alarmManager.set(AlarmManager.RTC_WAKEUP,calendar.getTimeInMillis(), ObjPendingIntent);

You can get the to do list on the Particular Time, Read on the PendingIntents and Alarmmanager by the following links..

http://developer.android.com/reference/android/app/PendingIntent.html

and

http://developer.android.com/reference/android/app/AlarmManager.html