title: ':app:transformClassesWithDexForDebug'. > com.android.build.transform.api.TransformException: when i added Facebook latest SDK in my studio project
body: <p>I am getting error when i try to add Facebook as a library or as a gradle </p>
  
  <pre><code>//compile 'com.facebook.android:facebook-android-sdk:4.7.0'
  </code></pre>
  
  <p>Here is my android studio project structure my main App folder gradle have following library .</p>
  
  <pre><code>  compile fileTree(include: ['*.jar'], dir: 'libs')
  
      compile project(':twitter-core-release')
      compile project(':tweet-ui-release')
      compile project(':twitter-release')
      compile project(':tweet-composer-release')
      //compile 'com.facebook.android:facebook-android-sdk:4.7.0'
      compile project(':facebook_sk')
      compile 'com.android.support:appcompat-v7:23.0.1'
      compile 'com.android.support:design:23.0.1'
      compile 'com.squareup.retrofit:retrofit:2.0.0-beta1'
      compile 'com.squareup.retrofit:converter-jackson:2.0.0-beta1'
      compile 'com.squareup.retrofit:adapter-rxjava:2.0.0-beta1'
      compile 'com.twotoasters.jazzylistview:library:1.2.1'
      compile 'com.twotoasters.jazzylistview:library-recyclerview:1.2.1'
      compile 'com.pnikosis:materialish-progress:1.7'
      compile 'com.google.android.gms:play-services-gcm:8.1.0'
      compile 'com.android.support:recyclerview-v7:23.0.1'
      compile 'io.realm:realm-android:0.82.2'
      compile 'com.google.android.gms:play-services-analytics:8.1.0'
      compile 'jp.wasabeef:recyclerview-animators:1.3.0'
      compile 'com.google.code.gson:gson:2.3'
      compile 'io.fabric.sdk.android:fabric:1.3.+@aar'
      compile 'com.digits.sdk.android:digits:1.7.+@aar'
  </code></pre>
  
  <p>in my app libs it have universal-image-loader-1.9.4.jar</p>
  
  <p>and in facebook_sk it have following </p>
  
  <pre><code>dependencies {
      compile fileTree(include: ['*.jar'], dir: 'libs')
      testCompile 'junit:junit:4.12'
      //compile 'com.android.support:appcompat-v7:23.0.1'
      compile 'com.android.support:support-v4:23.0.1'
  }
  </code></pre>
  
  <p>in facebook libs it have bolts-android-1.1.2.jar </p>
  
  <p>if i removed facebook skd and build my project then it running fine in studio but when i unable facebook sdk then it give me following error :</p>
  
  <pre><code>Error:Execution failed for task ':app:transformClassesWithDexForDebug'.
  &gt; com.android.build.transform.api.TransformException: com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command '/Library/Java/JavaVirtualMachines/jdk1.8.0_51.jdk/Contents/Home/bin/java'' finished with non-zero exit value 2
  </code></pre>
  
  <p>Do i need to use multidex ?</p>