compiling google cloud service client library with guava

Question

I'm using android studio. I'm developing an app with google cloud appengine (endpoints) and google cloud storage. When I write the gradle dependencies as shown:

dependencies {
    compile 'com.google.apis:google-api-services-storage:v1beta2-rev77-1.20.0'
    compile 'com.android.support:appcompat-v7:22.2.0'
    compile 'com.android.support:multidex:1.0.1'
    compile project(path: ':backend', configuration: 'android-endpoints')


    compile files('libs/joda-time-2.8.2.jar')
    compile ('com.google.appengine.tools:appengine-gcs-client:0.4.4')
    compile files('libs/guava-18.0.jar')
}

I retrieve an error when compiling:

Error:Execution failed for task ':app:packageAllDebugClassesForMultiDex'.
 java.util.zip.ZipException: duplicate entry: com/google/common/reflect/TypeToken$TypeCollector$ForwardingTypeCollector.class

I've tried to exclue in this way

compile ('com.google.appengine.tools:appengine-gcs-client:0.4.4'){
    exclude group: 'com.google.guava'
}

But nothing works. Can anybody help me?

Answer 1

1) First of all let's remove this ugly jars from your dependencies. I am about joda-time and guava

compile 'joda-time:joda-time:2.8.2'  
compile 'com.google.guava:guava:18.0'     

2) Move exclude group: 'com.google.guava' from appengine to apis

compile ('com.google.apis:google-api-services-storage:v1beta2-rev77-1.20.0') {
        exclude group: 'com.google.guava'
}

And add it to your :backend

compile (project(path: ':backend', configuration: 'android-endpoints')) {
    exclude group: 'com.google.guava'
}

3) Now you can get this error com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command '...java'' finished with non-zero exit value 1
If yes we should add exclude to appengine

compile('com.google.appengine.tools:appengine-gcs-client:0.4.4') {
    exclude group: 'javax.transaction'
}

4) Now you get Duplicate files copied in APK META-INF/NOTICE.txt
And this we solve with packagingOptions in android {} section

packagingOptions {
        exclude 'META-INF/NOTICE.txt'
}

So your final result

android {
    ...
    packagingOptions {
        exclude 'META-INF/NOTICE.txt'
    }
}
dependencies {
    compile (project(path: ':backend', configuration: 'android-endpoints')) {
        exclude group: 'com.google.guava'
    }

    compile 'com.android.support:appcompat-v7:22.2.0'
    compile 'com.android.support:multidex:1.0.1'

    compile 'joda-time:joda-time:2.8.2'
    compile 'com.google.guava:guava:18.0'

    compile ('com.google.apis:google-api-services-storage:v1beta2-rev77-1.20.0') {
        exclude group: 'com.google.guava'
    }
    compile('com.google.appengine.tools:appengine-gcs-client:0.4.4') {
        exclude group: 'javax.transaction'
    }
}