AndroidOnboarder
· Android Onboarder is a simple and lightweight library that helps you to create cool and beautiful introduction screens for your apps without writing dozens of lines of code.
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 onboarder-2.0.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.
