![]() ![]() AlarmManager lets you broadcast an Intent at a scheduled time, or after a specific interval. The AlarmManager class gives you access to the Android system alarm services. If the screen is off, this alarm wakes the device's CPU. RTC_WAKEUP: Fires the pending intent at the specified time.All repeating alarms fire when your device is next awake. RTC: Fires the pending intent at the specified time but doesn't wake the device.The AlarmManager class provides two types of RTC alarm: The alarm time is dependent on current locale.You need your alarm to fire at a particular time of day.Only choose an RTC alarm in these types of situations: Real-time clock (RTC) alarms are clock-based alarms that use Coordinated Universal Time (UTC). If your app has a time dependency, for example if your app has a limited window during which to perform an operation, use this alarm instead of ELAPSED_REALTIME. ![]() ELAPSED_REALTIME_WAKEUP: Fires the PendingIntent after the specified length of time has elapsed since device boot.The elapsed time includes any time during which the device was asleep. ELAPSED_REALTIME: Fires a PendingIntent based on the amount of time since the device was booted, but doesn't wake the device.The AlarmManager class provides two types of elapsed real-time alarm: For example, you can schedule operations without relying on timers or continuously running background services.Įlapsed real-time alarms use the time, in milliseconds, since the device was booted. When used correctly, alarms can help you minimize your app's resource requirements.You can use them to trigger events or actions even when your app isn't running, and even if the device is asleep. You can use alarms with broadcast receivers to start services and perform other operations. Alarms let you send an Intent at set times or intervals.Alarms in Android have the following characteristics: To create alarms, you use the AlarmManager class. How to use alarms to trigger tasks at specific times, whether or not your app is running when the alarms go off.įor example, you can use a repeating alarm to schedule a download every day at the same time. ![]()
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