ProgressFragment Library
· Implementation of the fragment with the ability to display indeterminate progress indicator when you are waiting for the initial data
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 progressfragment-native-1.4.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.