Resolve duplicate classes with firebase and dialog-flow

Question

I am working on a mobile app where I need dialog-flow in order to get some information from a user message. The problem is, when I implement dialog-flow into the app gradle, I get an error on build, saying that I have multiple duplicate classes ( conflicting with firebase classes).

I've tried methods suggested here: https://stackoverflow.com/a/51695425/11023871

and even searched on the github repository of dialog-flow: https://github.com/googleapis/google-cloud-java/issues/5608#issue-462434090

I tried to exclude 'google-protobuf', but that didn't help (I got compilation error on dialog-flow components).

I attached my dependencies below.

dependencies {
    implementation 'com.hbb20:ccp:2.2.4'
    implementation 'com.android.support:recyclerview-v7:28.0.0'
    implementation 'com.facebook.android:facebook-android-sdk:[5,6)'
    implementation 'com.google.firebase:firebase-auth:17.0.0'
    implementation 'com.google.firebase:firebase-core:16.0.9'
    implementation 'com.google.android.gms:play-services-auth:16.0.1'
    implementation 'androidx.cardview:cardview:1.0.0'
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'androidx.appcompat:appcompat:1.0.2'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test:runner:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
    implementation 'com.google.android.material:material:1.0.0'
    implementation 'com.google.firebase:firebase-database:17.0.0'
    implementation 'com.google.firebase:firebase-firestore:19.0.2'
    implementation 'com.google.cloud:google-cloud-dialogflow:0.99.0-alpha'
}

EDIT These are some of the duplicates specified by gradle: Duplicate class com.google.api.Advice found in modules classes.jar (com.google.firebase:protolite-well-known-types:16.0.1) and proto-google-common-protos-1.16.0.jar (com.google.api.grpc:proto-google-common-protos:1.16.0)

Duplicate class com.google.api.Advice$1 found in modules classes.jar (com.google.firebase:protolite-well-known-types:16.0.1) and proto-google-common-protos-1.16.0.jar (com.google.api.grpc:proto-google-common-protos:1.16.0)

Duplicate class com.google.api.Advice$Builder found in modules classes.jar (com.google.firebase:protolite-well-known-types:16.0.1) and proto-google-common-protos-1.16.0.jar (com.google.api.grpc:proto-google-common-protos:1.16.0)

Duplicate class com.google.api.AdviceOrBuilder found in modules classes.jar (com.google.firebase:protolite-well-known-types:16.0.1) and proto-google-common-protos-1.16.0.jar (com.google.api.grpc:proto-google-common-protos:1.16.0)

Duplicate class com.google.api.AnnotationsProto found in modules classes.jar (com.google.firebase:protolite-well-known-types:16.0.1) and proto-google-common-protos-1.16.0.jar (com.google.api.grpc:proto-google-common-protos:1.16.0)

Duplicate class com.google.api.AuthProto found in modules classes.jar (com.google.firebase:protolite-well-known-types:16.0.1) and proto-google-common-protos-1.16.0.jar (com.google.api.grpc:proto-google-common-protos:1.16.0)

Answer 1

I was stuck with the same issue and after months of debugging and thanks to an update from Google and Firebase, I came by a solution that's working. I needed to change library versions of Firebase and dialog flow. Change min SDK version to 19 if lesser than 19 in your project.

Firebase implementation:

Dialog flow implementation:

Answer 2

Add the following snippet to your build.gradle and then run gradle findDuplicates. This will list any duplicate classes and which jars they are in. After that you can see which ones you want to exclude.

task findDuplicates {
   doLast {
      Map<String, List<File>> pathMap = [:] 
      configurations.runtime.each { file ->
         FileTree tree = file.directory ? fileTree(file) : zipTree(file) 
         tree.visit { FileVisitDetails fvd ->
            if (!fvd.directory) {
               String path = fvd.path
               List<File> fileList = pathMap[path]?:[] 
               fileList << fvd.file
               pathMap[path] = fileList
            } 
         } 
      } 
      pathMap.each { path, fileList ->
         if (fileList.size() > 1) {
            println "Found duplicate $path in $fileList" 
         } 
      } 
   } 
}