Android Authentication Manager
· Handles much of the cruft needed in Android to interface with AccountManager and provides a mechanism for storing a user in your app within AccountManager and automatically refreshing an OAuth2 token when necessary.
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 auth-manager-1.0.3.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.
