Virgil Android Utils
· Virgil is a stack of security libraries (ECIES with Crypto Agility wrapped in Virgil Cryptogram) and all the necessary infrastructure to enable seamless, end-to-end encryption for any application, platform or device.
Learn about Virgil Java/Android SDK https://virgilsecurity.com/api-docs/java-android/quickstart
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-utils-7.3.2.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.