I am trying to implement the new ActionBar support library that was released by Google a couple days ago. In the past, I have successfully implemented ActionBarSherlock wit
It happened to me when Eclipse(Luna)/AndroidSDK(not Android Stduio) were used with the latest tools and library as of Jan. 14, 2015 during the project like HelloWorld. When I installed those tools and made HelloWorld the first app, I accepted all the defaults. - This is the problem in my case.
First, check whether or not the "Android Support Library" library is installed. If not, install it. It is not installed by default. You may do it all in "Android SDK manager" available in the menu.
(Android SDK Manager -> Extra -> Android Support Library)
Blessings, (a debtor)<><