Possible Duplicate:
Difference between drawable and drawable-mdpi
I can understand the role of drawable-ldpi, drawable-mdpi, and drawable-hdpi and their needed ratio size. But how about this folder "drawable", what is this folder for? What resolution of image should i put here?
It's a good (and usually the only sensible) place to put xml-based drawables (level lists, state lists, etc.) See the docs on drawable resources for all the possibilities. These drawables refer to other drawables, which are usually in the density-specific folders.
Basically that is the "default" folder, used when Android cannot find the best-matching folders. So for example, if you only have "drawable" and "drawable-ldpi" folders, but the device is actually mdpi, then the resources in the "drawable" folder will be selected.
