duplicate entry: com/google/android/gms/auth/api/signin/internal/zzf.class

Question

After updated my google play services and google repository, I also updated my firebase sdk and I get this error when I start running the app but when I gradle it no errors

Answer 1

Add play services.

compile 'com.google.android.gms:play-services-auth:10.2.1'

Answer 2

To resolve the secondary problem of Failed to resolve: com.twitter.sdk.android:twitter:2.2.0, update your top-level (Project) build.gradle file to include these repositories:

    repositories {
        jcenter()
        mavenLocal()
        mavenCentral()
        maven { url 'https://maven.fabric.io/public' }
    }
}

This is taken from the project build file for the Firebase UI sample app.