SwipePicker
· A widget for Android that allows the user to enter different values, such as: time, date, number, without additional dialog windows using the swipe gestures.
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 swipe-picker-1.2.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.