singpass-webview-client
· SingpassWebViewClient is an extension of androidx.webViewClientCompat that handles opening of Singpass app upon clicking on a supported url.
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 singpass-webview-client-1.2.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.