At the moment, it is still going to be concept though, since I do not have the required resources to make this happen at this time. Just hope that I can inspire those Android developers that planned to do a FB client can produce a better app for Android, not just copy from iOS.
Thanks for the comment! Indeed, I haven't have a deep thought on the action bar placement yet, so temporarily I am putting the context specific actions at the bottom since the actions in the upper bar should be able to override the post selection.
But for sure your comment is more valid, and pretty inline with Android Design guide. Let see what I can do for the next revision.