Android in Action, Third Edition

Chapter 21. Android 3.0 action bar

 

This chapter covers

• Overview of the ActionBar classes
• Action bar display options
• The elements of the action bar
• Removing, showing and hiding the action bar
• Styling the bar

 

Android 3.0 introduced the action and system bars. The action bar is found at the top of the screen and replaces the traditional (pre–Android 3.0) application title. The always-visible system bar is found at the bottom of the screen and provides access to system-level information. By default, applications that target Android 3.0 are automatically assigned the new action bar and the new holographic theme. The content of the action bar is application-defined, meaning it’s contextual, and consists of tabs, actions, and menus, providing ...