*导入老项目，Gradle sync finished ，但是build的时候会出现这个错误，基本上网上的方法都试过了，没有效果，求大神答疑解惑！！！
What went wrong:
Execution failed for task ':app:transformClassesWithDexForPdmiDebug'.
com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.ide.common.process.ProcessException: Error while executing java process with main class com.android.dx.command.Main with arguments {--dex --force-jumbo --num-threads=4 --multi-dex --main-dex-list E:\app\android\android-pdmi\android-zk\app\build\intermediates\multi-dex\pdmi\debug\maindexlist.txt --output E:\app\android\android-pdmi\android-zk\app\build\intermediates\transforms\dex\pdmi\debug\folders\1000\1f\main E:\app\android\android-pdmi\android-zk\app\build\intermediates\transforms\jarMerging\pdmi\debug\jars\1\1f\combined.jar}
