Why Alarm icon is not shown ONLY on Samsung Android 9 devices when set with AlarmManager.setAlarmClock()?

Question

I use AlarmManager.setAlarmClock() to set an alarm. Alarm is fired on all devices, including Samsung, but the small alarm icon near the clock (top right corner of the screen) is missing on Samsung devices with Android 9. What am I missing here?

I know that the issue has also affected Google Clock application, but it was fixed recently.

My code:

val pendingAlarm = Intent(ACTION_FIRED)
    .apply {
        setClass(mContext, AlarmsReceiver::class.java)
        putExtra(EXTRA_ID, id)
        putExtra(EXTRA_TYPE, typeName)
     }
     .let { PendingIntent.getBroadcast(mContext, pendingAlarmRequestCode, it, PendingIntent.FLAG_UPDATE_CURRENT) }

 val pendingShowList = PendingIntent.getActivity(
     mContext,
     100500,
     Intent(mContext, AlarmsListActivity::class.java), PendingIntent.FLAG_UPDATE_CURRENT)

 am.setAlarmClock(AlarmManager.AlarmClockInfo(calendar.timeInMillis, pendingShowList), pendingAlarm)

Answer 1

From what I can tell, I think this is because of samsungs specific implementation of the android OS and seems to be related to the samsung OS implementation itself.

I found one thread discussing something very similar, which might be of some help: (found here: https://www.reddit.com/r/GalaxyS9/comments/anck2x/google_clock_no_upcoming_alarm_iconnotification/)

and i found another discussion regarding the same topic found here : (https://forums.androidcentral.com/samsung-galaxy-note-9/952204-alarm-icon.html)

it seems as if the OS only shows alarm indications a specific amount of time before the alarm goes off (some people are saying 30 minutes roughly, maybe OP can test to verify that)

This answer is not extremely useful and it's a bit all-over, but it seems to be reliant on the specific implementation of the android OS on the samsung device