android-easy-help-feedback
· Provides an easy way of adding an activity to that app that handles all the help, about and/or feedback information you want to include.
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 android-easy-help-feedback-0.9.6.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.