Payline Android SDK
· This SDK features Payline's Mobile SDK, which allows a merchant's mobile application to use Payline services to realize an online payment or manage the wallet.
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 android-sdk-0.9.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.