SectionedMergeAdapter is a library based on MergeAdapter by CommonsWare. It allows you to work with sections and subheaders in your ListViews. With this library, you get the advantage of stitching together the rows and the header of the subsection in the subsection itself. For example, if there are no rows in a subsection of the ListView, the header of the subsection is also not shown.
This is an event bus designed to allowing your application to communicate efficiently.