Using Alarmmanager to start a service at specific time

Question

I have searched a lot of places but couldnt find a clean sequential explanation of how to start a service (or if thats not possible then an activity) at a specific time daily using the AlarmManager??

I want to register several such alarms and triggering them should result in a service to be started. I'll be having a small piece of code in the service which can then execute and i can finish the service for good....

Calendar cal = Calendar.getInstance(); Calendar cur_cal = Calendar.getInstance(); cur_cal.setTimeInMillis(System.currentTimeMillis()); Date date = new Date(cur_cal.get(Calendar.YEAR), cur_cal.get(Calendar.MONTH), cur_cal.get(Calendar.DATE), 16, 45); cal.setTime(date); Intent intent = new Intent(ProfileList.this, ActivateOnTime.class); intent.putExtra("profile_id", 2); PendingIntent pintent = PendingIntent.getService(ProfileList.this, 0, intent, 0); AlarmManager alarm = (AlarmManager)getSystemService(Context.ALARM_SERVICE); alarm.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), pintent); System.out.println("The alarm set!!"); 

i tried this code to activate the alarm at 4.45... but its not firing the service... do i have to keep the process running?? M i doing anything wrong???

One more thing, my service gets perfectly executed in case i use the following code:

long firstTime = SystemClock.elapsedRealtime(); alarm.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, firstTime, 30*1000,pintent); 

Answer 1

HI friends, After a lot of researching and with reference from "Pentium10"'s question on the same topic i managed to get it working. Though i still cant understand why the "date" concept and the Calendar(non GregorianCalendar) object which i have mentioned in the question are not working correctly.

Calendar cur_cal = new GregorianCalendar(); cur_cal.setTimeInMillis(System.currentTimeMillis());//set the current time and date for this calendar  Calendar cal = new GregorianCalendar(); cal.add(Calendar.DAY_OF_YEAR, cur_cal.get(Calendar.DAY_OF_YEAR)); cal.set(Calendar.HOUR_OF_DAY, 18); cal.set(Calendar.MINUTE, 32); cal.set(Calendar.SECOND, cur_cal.get(Calendar.SECOND)); cal.set(Calendar.MILLISECOND, cur_cal.get(Calendar.MILLISECOND)); cal.set(Calendar.DATE, cur_cal.get(Calendar.DATE)); cal.set(Calendar.MONTH, cur_cal.get(Calendar.MONTH)); Intent intent = new Intent(ProfileList.this, IntentBroadcastedReceiver.class); PendingIntent pintent = PendingIntent.getService(ProfileList.this, 0, intent, 0); AlarmManager alarm = (AlarmManager)getSystemService(Context.ALARM_SERVICE); alarm.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 30*1000, pintent);