Redesign the Actionbar to use native Android Actionbar

With API >= 11 Google introduced a native actionbar framework in Android, wich provides many advantages compared to our self made one. It adapts to different screen sizes, showes more or less buttons, depending on the size, makes the app look native even in Android 4.0,...
more see here: http://developer.android.com/design/patterns/actionbar.html#organization
and here: http://android-developers.blogspot.com/2012/01/say-goodbye-to-menu-button.html
http://developer.android.com/reference/android/app/ActionBar.html

One problem was, that the Actionbar is only available in API >=11, but it seems to be working from SDK 4 upwards when using the approach shown here in an sample program from google:
http://developer.android.com/guide/topics/ui/actionbar.html
http://developer.android.com/resources/samples/ActionBarCompat/index.html

So in prinzipal, it seems like the redesign of Android is just a little copy paste from the sample programm into our code ;-)