Android-Exif-Extended
· Exif extended library for Android, based on jhead library (http://www.sentex.net/~mwandel/jhead/) and on the exif library used in the Android native gallery app
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-exif-extended-1.0.6.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.