On my alarm clock app, I have 180 crashes (impacted 42 users) of java.lang.SecurityException caused by NotificationManager.notify().

Since I have around 50K active users I guess it happens only under specific circumstances.

This is how I init my notification manager:

NotificationManager mgr = (NotificationManager) 
   context.getApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE);
// If there is a notification shown that might block the alarm, cancel it.
if (mgr != null) {
    mgr.cancel(NOTIFY_ID);
}

And here’s how I call the notify method:

 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) { // This is at least android 10...

    if (mgr.getNotificationChannel(CHANNEL_WHATEVER) == null) {

            NotificationChannel notificationChannel = new 
                NotificationChannel(CHANNEL_WHATEVER,
                context.getString(R.string.alarms_channel_name), 
                NotificationManager.IMPORTANCE_HIGH);
             notificationChannel.setSound(mAlarm.getAlarmTone(), new 
                  AudioAttributes.Builder()
                  .setUsage(AudioAttributes.USAGE_ALARM)
                  .setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
                  .build());

                    mgr.createNotificationChannel(notificationChannel);
    }

    AudioManager audioManager = (AudioManager) 
       context.getSystemService(Context.AUDIO_SERVICE);
    audioManager.setStreamVolume(AudioManager.STREAM_ALARM, 
       audioManager.getStreamMaxVolume(AudioManager.STREAM_ALARM), 
       AudioManager.FLAG_REMOVE_SOUND_AND_VIBRATE);
    mgr.notify(NOTIFY_ID, buildNormal(context, i, pref).build())

   }

I thought that it might be because I can’t access the file of the notification sound, so I used try & catch, and in the catch to use the default ringtone like that:

 try {
        mgr.notify(NOTIFY_ID, buildNormal(context, i, pref).build());
     } catch (Exception e) {
        mgr.getNotificationChannel(CHANNEL_WHATEVER)
                 .setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_RINGTONE),
                            new AudioAttributes.Builder()
                            .setUsage(AudioAttributes.USAGE_ALARM)
                            .setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
                            .build());
          mgr.notify(NOTIFY_ID, buildNormal(context, i, pref).build());
     }

But it didn’t help.

It is also worth mentioning that I’m declaring the android.permission.READ_EXTERNAL_STORAGE and android.permission.WAKE_LOCK permissions, in the manifest.

Any idea what can I do?