Is 'transition' an invalid resource directory name on Android?

Question

I make the ApiDemos project from Android Sample Project. Unfortunately, the project complains invalid resource directory name transition /ApiDemos/res line 1 Android

Answer 1

In case another bonehead like me comes here: I didn't have version 19 of the API installed :P

Open up your SDK manager and download any necessary version. I just had the latest version installed (22?).

Also, this was for Xamarin for me. But it could be the case for others, too.