Android Alarm What is the difference between four types of Alarm that AlarmManager provides and when to use what? -

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i want know difference between rtc, rtc_wakeup, elapsed_realtime, elapsed_realtime_wakeup.
want write alarm application set alarm , close application , expect alarm time set.
there multiple alarms. right writing emulator later test on device. in emulator, once set alarm , close emulator , restart it, cleared, find rtc, rtc_wakeup , elapsed_realtime. confused. should used elapsed_realtime_wakeup? have not seen tutorial using elapsed_realtime_wakeup. please explain. thanks.

you read :

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

you have difference beetween alarms


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