un-material-tabs Library
· Custom tab layout which can be used as a material TabLayout alternative and consists basic functionality which Google's TabLayout has.
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 unmaterialtabs-0.1a.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.