How to fix push notification grey circle error?

Question

I create launcher icon for iOS and Android with flutter_launcher_icons.

I also use firebase_messaging for push notification.

On iOS there is no issue: it show correct app icon on left of notification text.

But on Android the push notification icon is not show correct on left of text. It only show gray circle (no outline). I use adaptive icon for Android. It is not transparency issue.

Why there is difference? How I can fix?

Thanks for help!

Solution

You must have to use a transparent with white/black background icon for notification as a small icon. you cannot use the color icon as a notification small icon, it will just display the shape of your icon that you used.

you can use your color icon as a notification large icon.