Hide the ActionBar if it is currently showing. If the window hosting the ActionBar does not have the feature Android.Views.Window.FEATURE_ACTION_BAR_OVERLAY it will resize application content to fit the new space available.
Instead of calling this function directly, you can also cause an ActionBar using the overlay feature to hide through Android.Views.View.SystemUiFlagFullscreen. Hiding the ActionBar through this system UI flag allows you to more seamlessly hide it in conjunction with other screen decorations.