ExpandableRecyclerviewWithReordering
· ExpandableRecyclerViewWithReordering provides an easy way of achieving the ExpandableListView effect with all the power of a RecyclerView and support for drag and drop reordenation
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 expandablerecyclerviewwithreordering-1.1.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.