R8: Type com.segment.analytics.BuildConfig is defined multiple times

[Anderzzon]

I can't build or run the app on Android.
Flutter 3.29.2
segment_analytics: ^1.1.4
Gradle 8.8.0

ERROR: /Users/user/Documents/Apps/app_flutter/build/segment_analytics/intermediates/runtime_library_classes_jar/debug/bundleLibRuntimeToJarDebug/classes.jar: R8: Type com.segment.analytics.BuildConfig is defined multiple times: /Users/user/Documents/Apps/app_flutter/build/segment_analytics/intermediates/runtime_library_classes_jar/debug/bundleLibRuntimeToJarDebug/classes.jar:com/segment/analytics/BuildConfig.class, /Users/user/.gradle/caches/8.10.2/transforms/7d773442004ed4374b199bc729525495/transformed/jetified-android-1.16.3-runtime.jar:com/segment/analytics/BuildConfig.class

[neelkanth-kaushik]

Hi @Anderzzon ,

The BuildConfig class is automatically generated by Android for each project or library and is typically unique to each module. However, when a dependency (like segment_analytics) includes a BuildConfig class, it can cause conflicts if the same class is bundled elsewhere.

Potential Solutions:

1. Exclude the duplicate BuildConfig.class

You can explicitly exclude the conflicting BuildConfig class from the dependency to prevent the duplication. To do this, add an exclusion rule in your build.gradle file:

dependencies {
    implementation('com.segment.analytics:analytics:1.16.3') {
        exclude group: 'com.segment.analytics', module: 'analytics'
    }
}

This will tell Gradle to exclude the BuildConfig class from one of the conflicting libraries, which should resolve the duplication.

2. Clean the project and rebuild

Sometimes, Gradle or Flutter builds can become corrupted, especially when dependencies change. You can try cleaning and rebuilding the project:

flutter clean
flutter pub get
flutter run

3. Update Gradle Dependencies

Ensure that all your Gradle dependencies are up to date, including the Gradle version, which can sometimes cause issues with libraries. You can update your Gradle version by modifying the gradle-wrapper.properties file. For example:

distributionUrl=https\://services.gradle.org/distributions/gradle-8.8-all.zip

And make sure your build.gradle files are using the correct versions of the Android Gradle Plugin.

You should also update segment_analytics to the latest stable version in your app.

Try the above methods and see if they resolve the issue.

As a last resort, you can disable R8 (which is responsible for the code shrinking and optimization) to see if that resolves the issue. This is not ideal for production but can be useful for debugging the issue.

In your gradle.properties file, add:

android.enableR8=false