title: Build errors with XML to java object converter dependency in build.gradle for retrofit
body: <p>I am trying to integrate XML to Java object converter into retrofit by following this <a href="https://futurestud.io/blog/retrofit-how-to-integrate-xml-converter/" rel="noreferrer">https://futurestud.io/blog/retrofit-how-to-integrate-xml-converter/</a></p>
  
  <p>I am getting build errors when I added dependency to my build.gradle.</p>
  
  <p>This is what I've added in my build.gradle.
  compile ('com.squareup.retrofit:converter-simplexml:1.9.0')</p>
  
  <p>Error Report:</p>
  
  <pre><code>Information:Gradle tasks [:app:assembleDebug]
  Warning:Dependency xpp3:xpp3:1.1.3.3 is ignored for debug as it may be conflicting with the internal version provided by Android.
  In case of problem, please repackage it with jarjar to change the class packages
  Warning:Dependency xpp3:xpp3:1.1.3.3 is ignored for release as it may be conflicting with the internal version provided by Android.
  In case of problem, please repackage it with jarjar to change the class packages
  </code></pre>
  
  <hr>
  
  <p>SO I TRIED this </p>
  
  <pre><code>compile ('com.squareup.retrofit:converter-simplexml:1.9.0') {
  exclude group: 'xpp3', module: 'xpp3'
  }
  </code></pre>
  
  <p>Error report with this:</p>
  
  <pre><code>trouble processing "javax/xml/stream/events/StartElement.class":
  Ill-advised or mistaken usage of a core class (java.* or javax.*)
  ....
  ...
  Error:Execution failed for task ':app:preDexDebug'.
  &gt; com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command '/Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home/bin/java'' finished with non-zero exit value 1
  </code></pre>
  
  <p>I tried gradle clean, build clean everything but of no use. Help me if you've any idea on it.</p>