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
http://developer.android.com/tools/support-library/setup.html has a bug. In Property->Java build path->'Project' and 'Order and Export', there should not be any jar's. Removing them, and checking 'Android Private Libraries' and 'Android Dependencies' solved my problem.
I am not sure whether v13 support library was available when this question was posted, but in case someone is still struggling, I have seen that adding android-support-v13.jar
will fix everything.
This is how I did it:
<your sdk path>\extras\android\support\v13\android-support-v13.jar
you need reference $ANDROID_SDK/extras/android/support/v7/appcompat
Follow the steps of @rcdmk. Delete the android support v4.jar in YOUR project. It conflicts with the new updated version found in appcompat.
I experienced the same problem as the OP after right-clicking on my project and selecting Close Unrelated Projects.
In my case, I resolved the problem by re-opening the appcompat_v7 project and cleaning/rebuilding both projects.
If you have added appCompat Library and also have given proper reference of appCompat from SDK location, try "invalidate caches/Restart".
You can find it from "File" menu in Android Studio.