com.android.build.api.transform.TransformException: java.util.zip.ZipException: duplicate entry: com/google/android/gms/internal/zzat.class
<p>I'm using Android Studio 1.5.1 and I'm getting a gradle build error.</p>

<p>build.gradle > add library > compile files('libs/tnkad-sdk.jar')</p>

<p>After trying to build, I get the following error:</p>

<pre><code>Error:Execution failed for task ':plup:transformClassesWithJarMergingForDebug'.  
&gt; com.android.build.api.transform.TransformException: java.util.zip.ZipException: duplicate entry: com/google/android/gms/internal/zzat.class
</code></pre>