Android statusbar overlay with ActionBar

Question

I know that I can make the ActionBar overlay using requestFeature(Window.FEATURE_ACTION_BAR_OVERLAY)
and can toggle/show the status bar in my screen (by switch

Answer 1

Why you dont make it in the Manifest

android:theme="@android:style/Theme.Black.NoTitleBar"

than you have no statusbar and more space for the Actionbar??