Android - Error converting bytecode to dex

问题

The app was working fine until I added a couple of libraries in the gradle file, I added the Google analytics and Admob library (which worked fine but the others who had the same problem said that Google Analytics library is the source of this error) and recently I added a third party library for styling a custom material design Scrollbar

Update I got the third party library for the scrollbar FROM HERE

Here's my dependencies :

dependencies {
  compile fileTree(dir: 'libs', include: ['*.jar'])
  compile 'com.android.support:appcompat-v7:23.4.0'
  compile 'com.android.support:design:23.4.0'
  compile 'com.android.support:support-v4:23.4.0'
  compile 'com.android.support:cardview-v7:23.4.0'
  compile 'com.android.support:recyclerview-v7:23.4.0'
  compile 'com.google.android.gms:play-services-ads:10.0.0'
  compile 'com.google.firebase:firebase-core:10.0.0'
  compile 'com.simplecityapps:recyclerview-fastscroll:1.0.11' //The scrollbar library
  testCompile 'junit:junit:4.12'
}

apply plugin: 'com.google.gms.google-services'

Event Log:

Information:Gradle tasks[:app:clean, :app:generateDebugSources, :app:mockableAndroidJar, :app:prepareDebugUnitTestDependencies, :app:generateDebugAndroidTestSources, :app:assembleDebug]
Error:Error converting bytecode to dex:
Cause: com.android.dex.DexException: Multiple dex files define Landroid/support/v4/accessibilityservice/AccessibilityServiceInfoCompat$AccessibilityServiceInfoVersionImpl;
Error:Execution failed for task ':app:transformClassesWithDexForDebug'.
com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: java.lang.UnsupportedOperationException

来源：https://stackoverflow.com/questions/40827973/android-error-converting-bytecode-to-dex