The choice of Action Bar layout depends on the theme. This also affects the widget used to render the Action Bar. Bug: http://b.android.com/77853 Change-Id: I6219a02853b4cd207a6125a5ed96fa5d16699460
Layoutlib is a custom version of the android View framework designed to run inside Eclipse. The goal of the library is to provide layout rendering in Eclipse that are very very close to their rendering on devices. None of the com.android.* or android.* classes in layoutlib run on devices.