2
Problem
My project is growing and with it, the amount of files in the layout folder, and it is already becoming somewhat difficult to find a specific file, since they are not grouped in any way, only in alphabetical order.
So I tried to create subfolders for layout, to separate them by sessions, for example:
layout
-- layout_grid
   -- grid_detail.xml
   -- grid_item.xml
--layout_form
   -- form1.xml
   -- form2.xml
But this does not seem to be supported, by Android, since the xml's, are no longer found.
Questions
- I would like to know if it is possible somehow to create subfolders for layout? 
- If the answer to the previous question is Not, then if there is any other good practice for organizing the layout folder? 
Very good, its indication, perhaps completed the 1° case of the prefixes, seems to be simpler, than the other, more being valid for future observation.
– Fernando Leal