title: Force Contextual Action Bar (CAB) for an Activity
body: <p>I want an acitivy to show a Contextual Action Bar, not normal ActionBar. The reason is that I show this activity in resonse for user long-clicking an item. </p>
  
  <p>I know how to hide title and in general make the normal ActionBar look similar to CAB, but not quite. May be there is a simple way of doing it?</p>
  
  <p>Update: 
  My question is similar, but not a complete duplication of <a href="https://stackoverflow.com/questions/6162595/how-to-invoke-the-actionbars-contextmenu-like-behavior">how to invoke the actionbars context menu like behavior question</a></p>
  
  <p>The difference is that I dont want at all to show a "normal" ActionBar, always the one that looks like Contextual ActionBar.</p>
  
  <p>The suggestion to move to ActionMode right in the activity onCreate. 
  ActionMode.Callback onDestroyActionMode() that is called when ActionMode ends, we would simply finish() the activity.
  It is a good one and almost does it. There are two subtle problems with this approach.</p>
  
  <p>One, there is an observable flicker when ActionBar shows and immediately goes to CAB.
  Second, the more substatial one is that there is no way to differentiate between edits that we want to "accept" and "decline". I would want checkmark mean that edits need to be accepted, and "back" button mean that edits need to be discarded. Unfortunately the suggested hack results in both routes ending with the call to onDestroyActionMode()</p>
  
  <p>I could have added more CAB action items, for saving or exiting without saving, but this defeats the purpose of having separate editing activity.</p>