Error:Execution failed for task ':im:transformClassesWithDexForDebug'.

Error:Execution failed for task ':im:transformClassesWithDexForDebug'.
> com.android.build.api.transform.TransformException:
com.android.ide.common.process.ProcessException:
java.util.concurrent.ExecutionException: com.android.ide.common.process.ProcessException:
org.gradle.process.internal.ExecException:

 Process 'command 'C:\Program Files\Java\jdk1.8.0_31\bin\java.exe'' finished with non-zero exit value 3

如果jar包不重复，你看看你引入的module设置是否jdk 为1.7，file --project Structure -----source  Compatibility 1.7  Target Compatibility 1.7 ,每个都设置就没事了