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

Question

I want to know the difference between RTC, RTC_WAKEUP, ELAPSED_REALTIME, ELAPSED_REALTIME_WAKEUP.
I want to write an alarm application where I will set

Answer 1

Types of Alarms :

• ELAPSED_REALTIME – Fires the pending intent after the specified length of time since device boot. If the device is asleep, it fires when the device is next awake.
• ELAPSED_REALTIME_WAKEUP – Fires the pending intent after the specified length of time since device boot. It wakes up the device if it is asleep.
• RTC – Fires the pending intent at a specified time. If the device is asleep, it will not be delivered until the next time the device wakes up.
• RTC_WAKEUP – Fires the pending intent at a specified time, waking up the device if asleep.