Android RangeSeekBar Library
· This library provides a SeekBar similar to the default Android one, but with two thumb controls allowing a range to be selected.
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 rangeseekbar-library-0.4.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.