CODEWITHSUNDEEP
androidalarmmanagerclockandroid-doze
user2469133
user2469133

Reputation: 1970

Android Handle All AlarmManager restrictions

I have an alarm clock app on the play store that works very well on most of the devices , but unfortunately some devices report the alarm does not fire on the time adjusted and i concluded from research that there are some devices that restrict apps running in the background and kills alarm manager !

I have handled doze mode using the following code :

if (Build.VERSION.SDK_INT >= 23)
{
alarmManager.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, timeStamp, pendingIntent);
}
else if (Build.VERSION.SDK_INT >= 19)
{
alarmManager.setExact(AlarmManager.RTC_WAKEUP, timeStamp, pendingIntent);
}
else
{
alarmManager.set(AlarmManager.RTC_WAKEUP, timeStamp, pendingIntent);
}

However this seems not enough on some devices.

I have read that a foreground service can prevent the system from killing the app anyway , however i can't ensure this also since i don't have in hand the devices where the problem occurs.

I want to ensure my alarm works perfectly fine on all devices and handles all scenarios , so what are all possible things to do to make sure my app runs properly and is not killed by the system?

Upvotes: 1

Views: 899

Answers (1)

ianhanniballake
ianhanniballake

Reputation: 199900

You should be using AlarmManagerCompat.setAlarmClock() to set a user visible alarm suitable for an alarm clock app. This API uses setAlarmClock() on API 21+, which as per its documentation:

these alarms will be allowed to trigger even if the system is in a low-power idle (a.k.a. doze) mode. The system may also do some prep-work when it sees that such an alarm coming up, to reduce the amount of background work that could happen if this causes the device to fully wake up -- this is to avoid situations such as a large number of devices having an alarm set at the same time in the morning, all waking up at that time and suddenly swamping the network with pending background work. As such, these types of alarms can be extremely expensive on battery use and should only be used for their intended purpose.

Upvotes: 4

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