title: Error when launching app on device
body: <p>I get this error when I try to run the app:</p>
  
  <pre><code>    Error:Execution failed for task ':app:transformClassesWithJarMergingForDebug'.
      &gt; com.android.build.api.transform.TransformException: java.util.zip.ZipException:
  duplicate entry: android/support/v4/print/PrintHelper$PrintHelperStubImpl.class
  </code></pre>
  
  <p>The Manifest contains this section:</p>
  
  <pre><code>&lt;uses-sdk
      android:minSdkVersion="7"
      android:targetSdkVersion="19"
      tools:ignore="OldTargetApi"
      tools:overrideLibrary="android.support.test.espresso,
                             android.support.v7.appcompat,
                             android.support.mediacompat,
                             android.support.v4,
                             android.support.fragment,
                             android.support.coreui,
                             android.support.coreutils,
                             android.support.graphics.drawable,
                             android.support.compat"&gt;
      &lt;/uses-sdk&gt;
  </code></pre>
  
  <p>These are the dependencies in the gradle:</p>
  
  <pre><code>dependencies {
      compile fileTree(include: ['*.jar'], dir: 'libs')
  //    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
  //        exclude group: 'com.android.support', module: 'support-annotations'
  //    })
      compile 'com.android.support:appcompat-v7:26.+'
      testCompile 'junit:junit:4.12'
      compile 'org.jbundle.util.osgi.wrapped:org.jbundle.util.osgi.wrapped.org.apache.http.client:4.1.2'
  }
  </code></pre>
  
  <p>Any ideas what I need to do?</p>
  
  <p>I'm new to Android development, so please assume that I know nothing...</p>