Exact alarm improvements-Android12

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In this article, we will go through the improvements that Android12 brings for Exact alarms ⏰.

• To make sure that the effective usage of system resources, Android 12 requires the “Alarms & reminders” special app access if apps that target Android 12 want to set exact alarms.
• SCHEDULE_EXACT_ALARM permission needs to be added in the manifest to get this special app access.
• Exact alarms should only be used for user-facing features. Acceptable use cases

Users or the system can revoke the “Alarms & reminders” special app access. All future exact alarms are canceled when the “Alarms & reminders” special app access is revoked for your app.

• The system sends the ACTION_SCHEDULE_EXACT_ALARM_PERMISSION_STATE_CHANGED broadcast to your app when the “Alarms & reminders” special app access is granted to your app.
• It will be sent to both runtime receivers and manifest receivers.
• It will not be sent when the user revokes the permission.

Check if the app has permission to set exact alarms?

• With the help of the canScheduleExactAlarms() method from AlarmManager, we can check that if we have access or not to set exact alarms ⏰

canScheduleExactAlarms()

SecurityException occurs if an app tries to use APIs that set exact alarms but isn’t granted special app access.

Ask users to grant the app access

If canScheduleExactAlarms() returns false, You can navigate the users to the Alarms & reminders screen in system settings where they can provide this special access to our app.

To do so, complete the following steps:

• Explain to the user why your app needs to schedule exact alarms ⏰.
• Invoke an intent with ACTION_REQUEST_SCHEDULE_EXACT_ALARM intent action

Open Alarms and Reminders Settings

BroadcasterReceiver implementation

To listen to the state of special app access permission, we need to implement the BroadcasterReceiver

• AlarmReciever

AlarmReceiver-Android12

• Register receiver via manifest

Add receiver to manifest

• Register runtime receiver

Register runtime receiver

Check full sample code

GitHub - navczydev/SplashScreenAPISample at exact-alarm-changes

😊😊 👏👏👏👏 HAPPY CODING 👏👏👏👏 😊😊

Demo 🥳🥳🥳🥳

• Special app access settings

Special app access settings

• Navigate to settings, allow the permission, and set the alarm

Application demo

References

https://developer.android.com/about/versions/12/behavior-changes-12#exact-alarm-permission

https://developer.android.com/reference/android/Manifest.permission#SCHEDULE_EXACT_ALARM

https://developer.android.com/reference/android/app/AlarmManager#ACTION_SCHEDULE_EXACT_ALARM_PERMISSION_STATE_CHANGED

https://developer.android.com/guide/components/broadcasts#receiving-broadcasts

Stay in touch

Nav Singh - Writer - Medium | LinkedIn

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Nav Singh - Medium

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