CircleTimeView
· CircleTimeView is a custom android view. It is designed because of a lack of any standard view from Android SDK. It can be used for timers, for setting time, etc.
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 circle-time-view-1.0.5.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.