title: java.util.zip.ZipException: duplicate entry: Error on Payu custom browser library
body: <pre><code>Error:Execution failed for task ':AppName:transformClassesWithJarMergingForRelease'.
  </code></pre>
  
  <blockquote>
    <p>com.android.build.api.transform.TransformException: java.util.zip.ZipException: duplicate entry: com/payu/custombrowser/BuildConfig.class</p>
  </blockquote>
  
  <p>Unfortunately, the above error is the only thing that we have as information about this error. When we are trying to build the app for release it finds duplicate entries. These files are from the <code>Payu</code> library and if you delete them from the hard disk they are again auto generated while compiling and causing the <code>duplicate entry error</code>. Also, 23 <code>BuildConfig.class</code> files exist in the entire folder(including Facebook, <code>Google play store</code>, Payu, <code>Image loader</code> libraries). Now, I am not sure which file to delete which to keep. Deleting the files is useless as it is again auto generated.  </p>
  
  <p>Thank you.</p>