Android 9.0 NotificationManager.notify() throwing java.lang.SecurityException

Question

I have been unable to reproduce this problem myself, but so far 5 users have reported it. I did recently publish an app update that changed the target SDK from 27 to 28 which I

Answer 1

I had this issue. Turns out that the creation of the notification channel was at fault.

Wrong way:

val notifictionChannel = NotificationChannel(...)
notificationChannel.setSound(
    RingtoneManager.getActualDefaultRingtoneUri(context, RingtoneManager.TYPE_NOTIFICATION),
    AudioAttributes.Builder().setUsage(AudioAttributes.USAGE_NOTIFICATION).build()
)

notificationManager.createNotificationChannel(notificationChannel)

Right way:

...
notificationChannel.setSound(
    Settings.System.DEFAULT_NOTIFICATION_URI,
    AudioAttributes.Builder().setUsage(AudioAttributes.USAGE_NOTIFICATION).build()
)
...