TinyDB
· This is an Shared Preferences library developed by Saad Ahmed. The library lets users to save data to shared preferences with extra features like putting and getting Object, Uri and Bitmap.
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 tinydb-1.0.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.