Failed to upgrade Fabric Crashlytics to Firebase Crashlytics

Question

I tried to follow the officiall upgrade documentation, but after I changed every related lines in gradle files I got this error:

A problem occurred evaluating project ':app'. Failed to apply plugin [id 'com.google.firebase.crashlytics'] Could not set unknown property 'obfuscatorVersion' for object of type com.google.firebase.crashlytics.buildtools.gradle.CrashlyticsExtension.

These are the Firebase versions:

firebaseCrashlytics = '17.0.1'

firebaseAnalytics = '17.4.3'

Other related dependencies:

classpath 'com.android.tools.build.gradle:3.6.3'

classpath 'com.google.gms:google-services:4.3.3'

classpath 'com.google.firebase:firebase-crashlytics-gradle:2.1.1'

If I comment out this line:

apply plugin: 'com.google.firebase.crashlytics'

everything is working fine... I can't upgrade to gradle 4.0.0 because DexGuard doesn't support it.

Answer 1

Ok, I got it. If anybody using DexGuard them must the Crashlytics plugin should be applied before the DexGuard plugin. This piece of magic linked in the release notes...

Answer 2

Use below configuration if your facing build issues using Android studio 4.1

• Android Gradle Plugin Version 3.6.0
• Gradle Version 6.5

implementation platform('com.google.firebase:firebase-bom:26.2.0')
implementation 'com.google.firebase:firebase-crashlytics'

classpath 'com.google.gms:google-services:4.3.4'
classpath 'com.google.firebase:firebase-crashlytics-gradle:2.4.1'```

Answer 3

Looks like gradle version issue.

Use updated gradle version:- classpath "com.android.tools.build.gradle:4.0.0"(latest)

or classpath 'com.android.tools.build.gradle:3.6.3'(old)

and updated gradle-wrapper.properties:- distributionUrl=https://services.gradle.org/distributions/gradle-6.1.1-all.zip(latest)

or distributionUrl=https://services.gradle.org/distributions/gradle-5.6.4-all.zip(old)

Answer 4

FLUTTER DEVELOPMENT :

Just for problem in future with FLUTTER framwork i had the same issue listed here on the question and the problem was in the file build.gradle and it gives me the following issue:

Build file 'C:\Users\MyUserName\AndroidStudioProjects\FlutterX UI\android\app\build.gradle' line: 23

• What went wrong: A problem occurred evaluating project ':app'.

Failed to apply plugin 'com.google.firebase.crashlytics'. Crashlytics was applied to a project without an Android plugin. Please make sure the Crashlytics plugin is applied after the appropriate Android plugin for your project.

AND i am using in pubspec.yaml those plugins: firebase_crashlytics , firebase_core .

So what caused a porblem for me the was in the file build.gradle and specificly in those line:

apply plugin: 'com.google.firebase.crashlytics'

apply plugin: 'com.google.gms.google-services'

apply plugin: 'com.android.application'

i just rearranged them as following and it worked like a charm:

apply plugin: 'com.android.application'

apply plugin: 'com.google.firebase.crashlytics'

apply plugin: 'com.google.gms.google-services'

I hope it will help someone in the future.