EOSIO SDK for Java: Android Keystore Signature Provider
· This provider is intended to be used in conjunction with EOSIO SDK for Java as a provider plugin..
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 eosioandroidkeystoresignatureprovider-1.0.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.