iconv
· This library provides an iconv() implementation, for use on systems which don't have one, or whose implementation cannot convert from/to Unicode.
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 libiconv-ndk26-shared-1.17-beta-1.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.