Push notification android studio firebase

Good morning, Please i need push notification, i have some erros in the android studio, where can i find that step by step?.., push notification for all android versions (cellphones)

You are asking how to use Android Studio to create push notifications. This is a Forum about App Inventor (which cannot create push notifications with Blocks). You might ask this question on stackoverflow

Thanks, i am going to try, in app inventor 2 i get with taifun extension blocks, it works in real time but it does not work in background like whatspp mobile app…