Android Action Bar

http://developer.android.com/guide/topics/ui/actionbar.html#SplitBar
http://developer.android.com/design/patterns/actionbar.html
http://developer.android.com/guide/practices/tablets-and-handsets.html#ActionBar
https://developer.android.com/training/basics/actionbar/index.htmlhttps://developer.android.com/training/basics/actionbar/index.html