Android Studio is not really usable as an IDE if you want to have a fully featured test suite because of the weird, half-implemented Gradle "auto-sync" magic (http://www.sep.com/sep-blog/2013/10/17/android-studio-not-re...). Until then, it's still good ole' reliable Eclipse (I can't believe I just said that). Until a different IDE can support Robolectric and Robotium/Instrumentation tests in the same projct that can be run/debugged inside the tool and report results in a window (command line and html test reports don't count, sorry), I won't be switching.