1 thought on “Android build failed @ task ‘:app:transformClassesWithJarMergingForDebug’”

  1. @simonhintersonnleitner you most likely have duplicate android libs, especially if you’re using multiple modules that require firebase, modify your android/app/build.gradle dependencies section to explicitly compile a certain firebase version and then exclude from other project compiles, e.g here’s what ours sort of looks like:

    // ...
dependencies {
    compile (project(':react-native-firebase')) {
       // EXCLUDED:
        exclude group: "com.google.android.gms"
        exclude group: "com.google.firebase"
    }

    compile (project(':react-native-google-analytics-bridge')) {
        exclude group: "com.google.android.gms"
    }

    compile (project(':react-native-push-notification')) {
        exclude group: "com.google.android.gms"
        exclude group: "me.leolin.ShortcutBadger"
    }

    compile (project(':react-native-appsflyer')) {
        exclude group: "com.google.android.gms"
    }

    compile (project(':react-native-device-info')) {
        exclude group: "com.google.android.gms"
    }

    compile (project(':RNAdMob')) {
        exclude group: "com.google.android.gms"
    }

    compile (project(':react-native-fcm')) {
        exclude group: "com.google.firebase"
        exclude group: "me.leolin.ShortcutBadger"
    }

    compile 'com.google.android.gms:play-services-base:10.2.0'
    compile 'com.google.android.gms:play-services-gcm:10.2.0'
    compile 'com.google.android.gms:play-services-analytics:10.2.0'
    compile 'com.google.android.gms:play-services-location:10.2.0'
    compile 'com.google.android.gms:play-services-ads:10.2.0'
    compile 'com.google.android.gms:play-services-identity:10.2.0'


    compile 'com.google.firebase:firebase-core:10.2.0'
    compile 'com.google.firebase:firebase-ads:10.2.0'
    compile 'com.google.firebase:firebase-config:10.2.0'
    compile 'com.google.firebase:firebase-auth:10.2.0'
    compile 'com.google.firebase:firebase-analytics:10.2.0'
    compile 'com.google.firebase:firebase-database:10.2.0'
    compile 'com.google.firebase:firebase-storage:10.2.0'
    compile 'com.google.firebase:firebase-messaging:10.2.0'
    compile 'com.google.firebase:firebase-crash:10.2.0'


    compile ('com.google.android.gms:play-services-gcm:10.2.0') {
        force = true;
    }

    compile fileTree(dir: "libs", include: ["*.jar"])
    compile 'com.facebook.react:react-native:+'  // From node_modules
}
// ...

    Same applies to other google libs like com.google.android.gms as above

Comments are closed.

1 thought on “Android build failed @ task ‘:app:transformClassesWithJarMergingForDebug’”

  1. @simonhintersonnleitner you most likely have duplicate android libs, especially if you’re using multiple modules that require firebase, modify your android/app/build.gradle dependencies section to explicitly compile a certain firebase version and then exclude from other project compiles, e.g here’s what ours sort of looks like:

    // ...
dependencies {
    compile (project(':react-native-firebase')) {
       // EXCLUDED:
        exclude group: "com.google.android.gms"
        exclude group: "com.google.firebase"
    }

    compile (project(':react-native-google-analytics-bridge')) {
        exclude group: "com.google.android.gms"
    }

    compile (project(':react-native-push-notification')) {
        exclude group: "com.google.android.gms"
        exclude group: "me.leolin.ShortcutBadger"
    }

    compile (project(':react-native-appsflyer')) {
        exclude group: "com.google.android.gms"
    }

    compile (project(':react-native-device-info')) {
        exclude group: "com.google.android.gms"
    }

    compile (project(':RNAdMob')) {
        exclude group: "com.google.android.gms"
    }

    compile (project(':react-native-fcm')) {
        exclude group: "com.google.firebase"
        exclude group: "me.leolin.ShortcutBadger"
    }

    compile 'com.google.android.gms:play-services-base:10.2.0'
    compile 'com.google.android.gms:play-services-gcm:10.2.0'
    compile 'com.google.android.gms:play-services-analytics:10.2.0'
    compile 'com.google.android.gms:play-services-location:10.2.0'
    compile 'com.google.android.gms:play-services-ads:10.2.0'
    compile 'com.google.android.gms:play-services-identity:10.2.0'


    compile 'com.google.firebase:firebase-core:10.2.0'
    compile 'com.google.firebase:firebase-ads:10.2.0'
    compile 'com.google.firebase:firebase-config:10.2.0'
    compile 'com.google.firebase:firebase-auth:10.2.0'
    compile 'com.google.firebase:firebase-analytics:10.2.0'
    compile 'com.google.firebase:firebase-database:10.2.0'
    compile 'com.google.firebase:firebase-storage:10.2.0'
    compile 'com.google.firebase:firebase-messaging:10.2.0'
    compile 'com.google.firebase:firebase-crash:10.2.0'


    compile ('com.google.android.gms:play-services-gcm:10.2.0') {
        force = true;
    }

    compile fileTree(dir: "libs", include: ["*.jar"])
    compile 'com.facebook.react:react-native:+'  // From node_modules
}
// ...

    Same applies to other google libs like com.google.android.gms as above

Comments are closed.