ErrorView Library
· A android library that displays an error image, a title, and a subtitle given an HTTP status code. It can be used for various other purposes like displaying other kinds of errors, or just messages with images.
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 library-2.2.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.