Class 'MyFirebaseMessagingService' is not abstract and does not implement abstract base class member public abstract fun zzd(p0: Intent!)

Question

Here I have used FirebaseMessagingService in Kotlin but when I run the project it will give me the following error:

Class \'MyFirebaseMessagingService

Answer 1

On 2nd of May there is a new release that allow the below

Firebase Android SDKs now have independent version numbers, allowing for more frequent, flexible updates.

So I think now we need to used different versions according to each module, check release notes pages to latest released details https://firebase.google.com/support/release-notes/android

Answer 2

Firebase Android Release Notes

Firebase Core     com.google.firebase:firebase-core:15.0.2
Analytics         com.google.firebase:firebase-analytics:15.0.2
Authentication    com.google.firebase:firebase-auth:15.1.0
Cloud Firestore   com.google.firebase:firebase-firestore:16.0.0
Cloud Messaging   com.google.firebase:firebase-messaging:15.0.2

Unit defined in com.google.firebase.messaging.FirebaseMessagingService

You should Downgrade version. Use 15.0.0.

 com.google.firebase:firebase-****:15.0.0

NOTE

If the problem still coming, You can use stable 12.0.1.

 com.google.firebase:firebase-****:12.0.1