My app is compatible with Android 1.6 - Android 4.0.3. I want my drawables to target each platform from start to end with all the relevant qualifiers (x|h/m/ldpi & swxxxdp) where the system theme changed.

Off the top of my head, 1.6 - 2.2 was one theme, 2.3.x was 1 theme, 3.0x was another theme and now 4.0x is another theme. 

Currently, my res folder looks like this:

* drawable
* drawable-hdpi
* drawable-hdpi-v11
* drawable-hdpi-v9
* drawable-ldpi-v9
* drawable-mdpi-v11
* drawable-mdpi-v9
* drawable-sw320dp
* drawable-sw600dp
* drawable-sw720dp
* drawable-v11
* drawable-xlarge

With each Android version, I feel my res folders are less efficient than they could be. Having looked at the ICS source res, there are only a few base drawable folders, the others are mainly language specific.

My question is a) how to organise my drawables folders to target each theme correctly & b) am I doing something wrong with the folders at the moment?