I had this problem.
What you need to do is go to File > Project Structure... and click Modules . Make sure that ActionBarSherlock has a support library on the Dependencies tab. If not, click the plus sign at the bottom and add the library (you may need to click New Library... to select the libs folder in the subproject).
After that, change the scope to Provided so as not to create lib conflicts when compiling your application.
Dano source share