title: How to add a "Virtual"/"Shadow" Group to SimpleCursorTreeAdapter?
body: <p>I have a problem concerning a SimpleCursorTreeAdapter which I subclassed in my project. It currently communicates with a SQLite-DB over a ContentProvider. Now, i have the problem that i would like to insert some kind of "Shadow" or "Virtual" Group that is not present in the backend ContentProvider/DB.</p>
  
  <p>I could  imagine that this is possible in two ways -- I just can't work out the details. Either we find the actual methods drawing and listing the groups of the SimpleCursorTreeAdapter internally, or we implement a custom Cursor that behaves like a SQliteCursor, except that it returns ColumnCount+1 and appends an "virtual" element for that "virtual" group when queried...</p>
  
  <p>Is there anyone who already did something like this, or might have an idea how to solve this less dirty-hack-y?</p>