Class 'MyFirebaseMessagingService' is not

问题:

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

Class 'MyFirebaseMessagingService' is not abstract and does not implement abstract base class member public abstract fun zzd(p0: Intent!): Unit defined in com.google.firebase.messaging.FirebaseMessagingService

Any help?

回答1:

If you aren't using any other play services then upgrade your firebase version to 15.0.2.

if you are, downgrading to 12.0.1 will work.

Make sure to stick to play service 3.2.1 since 3.3.0 will still crash firebase-config.

回答2:

Update all your Firebase dependencies to use the latest version: 15.0.2
https://firebase.google.com/support/release-notes/android

回答3:

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

回答4:

Just update google-services to 3.2.1 with 3.3.0 might be some problems

classpath 'com.google.gms:google-services:3.2.1'

and firebase-messaging to 15.0.2

implementation 'com.google.firebase:firebase-messaging:15.0.2'

回答5:

We have the same problem with version 15.0.0.
Downgrade to 12.0.1 solves the problem.

回答6:

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

回答7:

I fixed this issue by -

• Updating

classpath 'com.google.gms:google-services:3.1.0' to classpath 'com.google.gms:google-services:3.2.1'

Firebase version from 15.0.0 to 15.0.2 for all except firebase auth as it is at 15.1.0

At last I updated google play services version from 15.0.0 to 15.0.1

After all these changes sync your gradle files.

Hope this helps.

回答8:

Pretty much the same answer as everyone. You need to update all the firebase and google play services stuff. The thing to take away is that FIREBASE AND GOOGLE PLAY SERVICES VERSION ARE NOT ALWAYS IN SYNC ANYMORE APPARENTLY. So if you are using something like

ext {
    firebase_version = "15.0.2"
}

Just ditch them. For all the versions and stuff,

• Click here for Firebase
• Click here for Google Play Services
• Click here for Google Service Plugin

回答9:

I have tried everything possible kept my play libraries at version 15.0.0 but switch firebase libraries to 15.0.2 and that still give me this error:

NotificationMessagingService.kt: (8, 1): Class 'NotificationMessagingService' is not abstract and does not implement abstract base class member public abstract fun zzd(p0: Intent!): Unit defined in ......RemoteNotificationMessagingService :app:compileDebugKotlin FAILED

I also tried to switch to using latest google-service plugin 3.3.1, that gives me some weird errors, that make no sense to me!

More than one variant of project :utilities matches the consumer attributes:
  - Configuration ':utilities:debugApiElements' variant android-aidl:
      - Found artifactType 'android-aidl' but wasn't required.
      - Required com.android.build.api.attributes.BuildTypeAttr 'debug' and found compatible value 'debug'.
      - Found com.android.build.api.attributes.VariantAttr 'debug' but wasn't required.
      - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found compatible value 'Aar'.
      - Required org.gradle.usage 'java-api' and found compatible value 'java-api'.

I am running Android Studio 3.2 and it gives me above problems.

Using gradle4-5 and