I am working with XOOM and trying to hide action bar. So i follow the instruction did the following in manifest file:
uses-sdk android:minSdkVersion=\"11\" an
The action bar in Honeycomb cannot be hidden because there are no physical buttons to back out of the app, so you could trap users in the app if the action bar is hidden. The best you can do is put the bar in "lights out" mode, where you get the small dots in place of the normal icons in the bar.
See this link: Is there a way to hide the system bar in Android 3.0? It's an internal device and I'm managing navigation