How to make images look good on both nexus and nexus 10?

I'm trying to make my app workable and visually better across all different screen sizes, but I have run into some issues. I have a simple image layout : enter image description here

The images are sized 200 x 200 for small and 400 x 400 for the large. In the drawable folders I have made some smaller ones for smaller screens 100x100 , 200x200 and then 50x50 , 100x100. However looking at the list of devices in eclipse, the galaxy nexus 10 and the galaxy nexus both take their images from the xdpi folder. If I make the images work for the nexus its makes the nexus 10 really small and if I make them for the nexus 10 it messes up the layout for other devices. Why doesn't the nexus 10 just use the xxhdpi folder ?

How can I get around this issue ? I want to avoid separate layouts if possible as I've not attempted that yet as i'm still new to android programming.

How can solve this issue ?

Go easy on me as im still quite new. Thanks

edit

Listed as galaxy nexus in eclipse (720 x 1280) and Nexus 10 (2560 x 1600)

as you can see major difference in sizes but use the same xdpi folder

Solution

You can declare drawables for different screen widths

drawable-sw720dp/