Error:Execution failed for task \':app:transformClassesWithDexForDebug\'. com.android.build.api.transform.TransformException: com.android.ide.common.process
I also faced the same issue after did reach i got resolved. issue could be the classes folder not created under build directory while you build the project, the reason for that the project path may not correct. so you have to correct the project path and rebuild that it will work fine. java files should be under path \src\main\java for gradle proejct