Execution failed for task ':app:transformClassesWithDexForDebug' while implementing Google sign in for Android

Question

I\'m trying to implement Google sign in for Android and I\'m following the instructoins via

https://developers.google.com/identity/sign-in/android/start-integrating<

Answer 1

Adding

 dexOptions {
        incremental = true;
        preDexLibraries = false
        javaMaxHeapSize "4g" // 2g should be also OK
    }

in with in android in build.gradle works for me.