Cockpit
· Cockpit is an Android library providing a way to easily define a set of parameters that can be accessed and changed by the developers via built-in compact UI at runtime.
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 cockpit-3.1.2.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.