Push Notification dont pop up

Question

I created an Android App with Android Studio. Now I want to do push notifications with Google Firebase.

I have everything set up.

Everything is working well.

This is the problem:

When I send a cloud message to my device as a test, it works. However, when I send a cloud message normally, not as a test, nothing happened.

It does work with Android Studio.

It makes no difference if the app is open or closed.

Why does it not work?

Answer 1

If use Android upper Oreo. Need setup channel id and configurate him (sound, priority) https://developer.android.com/training/notify-user/channels

and after in firebase message add channel id.