ActionBarSherlock
· Library for implementing the action bar design pattern using the native action bar on Android 4.0+ and a custom implementation on pre-4.0 through a single API and theme. http://actionbarsherlock.com
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window actionbarsherlock-4.3.1.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.