Well For Showcase View
I using this:
https://github.com/amlcu
The sample you use needs the ActionBarSherlock Library, you can read it in the instructions from the github page: "To use the sample download ActionBarSherlock and add it as a dependency to the library project. Use point 1 on the "Including in your project" instructions at the link."
Then the style errors will go away and R can be built.