title: Gradle build transform error
body: <blockquote>
    <p>Error:Execution failed for task
    ':app:transformClassesWithJarMergingForDebug'.</p>
    
    <blockquote>
      <p>com.android.build.api.transform.TransformException: java.util.zip.ZipException: duplicate entry:
      bolts/AggregateException.class</p>
    </blockquote>
  </blockquote>
  
  <p>build.gradle file </p>
  
  <pre><code>android {
  compileSdkVersion 25
  buildToolsVersion '25.0.0'
  
  defaultConfig {
      applicationId "com.example.app"
      minSdkVersion 14
      targetSdkVersion 25
      versionCode 1
      versionName "1.0"
      multiDexEnabled true
  }
  buildTypes {
      release {
          minifyEnabled false
          proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
      }
  }
  
  
  }
  
  
  
  dependencies {
  compile fileTree(include: ['*.jar'], dir: 'libs')
  compile 'com.android.support:appcompat-v7:21.0.3'
  compile 'com.google.android.gms:play-services:10.2.0'
  compile 'se.emilsjolander:stickylistheaders:2.5.2'
  compile 'com.squareup.picasso:picasso:2.5.2'
  compile 'com.facebook.android:facebook-android-sdk:4.0.0'
  //compile 'com.google.firebase:firebase-messaging:10.2.0'
  
  }
  apply plugin: 'com.google.gms.google-services'
  </code></pre>