Whever I try to debug and deploy my android application (in Android Studio 0.9) I get the following error:
Execution failed for task \':app:packageAllDebugCl
This type of error like duplicate entry occurs when you some class is at more than one place. To overcome this problem , Simple search the class which shows duplicate entry in project. It will show you all paths where this class present more than one place. In Windows CNTRL+N is keyboard shortcut for search in files. Simple try to remove one of the lib or file and the problem is solved.