SimpleMaterialLibrary
· A simple Material library which follows Google's guidelines. Lollipop specific effects (such as ripples) won't be ported-back to older versions of Android.
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 simple-material-library-0.1.5.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.