ActionBar or ActionBarSherlock - Smoothly Hide / Show the ActionBar

Question

I\'m using ActionBarSherlock, and attempting to hide / show the ActionBar for fullscreen images, using:

getSupportActionBar.hide();

and

Answer 1

I use an overlay ActionBar

 requestWindowFeature(com.actionbarsherlock.view.Window.FEATURE_ACTION_BAR_OVERL‌​AY);

it doesn't show an animation when show()/hide() is called.