PinCodePicker
· PinCodePicker was created for Android platform as a view which allows to take passwords/codes or some other sensitive data from end user in easy way, so developers can focus on the core functionalities of their application!
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 pincodepicker-0.0.3.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.