title: Android Dex: [ActivityName] Unable to execute DX
body: <p>When i compile my project i'm given this kind of errors ; </p>
  
  <blockquote>
    <p>Error:Android Dex: [OdeAl] Unable to execute DX
    Error:Android Dex: [OdeAl] com.android.dex.DexException: Multiple dex files define Landroid/support/v4/accessibilityservice/AccessibilityServiceInfoCompat$AccessibilityServiceInfoVersionImpl;
    Error:Android Dex: [OdeAl] at com.android.dx.merge.DexMerger.readSortableTypes(DexMerger.java:594)
    Error:Android Dex: [OdeAl] at com.android.dx.merge.DexMerger.getSortedTypes(DexMerger.java:552)
    Error:Android Dex: [OdeAl] at com.android.dx.merge.DexMerger.mergeClassDefs(DexMerger.java:533)
    Error:Android Dex: [OdeAl] at com.android.dx.merge.DexMerger.mergeDexes(DexMerger.java:170)
    Error:Android Dex: [OdeAl] at com.android.dx.merge.DexMerger.merge(DexMerger.java:188)
    Error:Android Dex: [OdeAl] at com.android.dx.command.dexer.Main.mergeLibraryDexBuffers(Main.java:439)
    Error:Android Dex: [OdeAl] at com.android.dx.command.dexer.Main.runMonoDex(Main.java:287)
    Error:Android Dex: [OdeAl] at com.android.dx.command.dexer.Main.run(Main.java:230)
    Error:Android Dex: [OdeAl] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    Error:Android Dex: [OdeAl] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    Error:Android Dex: [OdeAl] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    Error:Android Dex: [OdeAl] at java.lang.reflect.Method.invoke(Method.java:597)
    Error:Android Dex: [OdeAl] at org.jetbrains.android.compiler.tools.AndroidDxRunner.runDex(AndroidDxRunner.java:161)
    Error:Android Dex: [OdeAl] at org.jetbrains.android.compiler.tools.AndroidDxRunner.main(AndroidDxRunner.java:294)
    Error:Android Dex: [OdeAl] at com.intellij.rt.execution.CommandLineWrapper.main(CommandLineWrapper.java:121)</p>
  </blockquote>
  
  <p>How can i fix this errors?</p>