Grouping drawables by screen size instead of density
<p>I've read this article <a href="http://developer.android.com/guide/practices/screens_support.html" rel="nofollow">Supporting Multiple Screens</a>, but still don't get one thing and need an advice.</p>

<p>I have 3 psd files which contains design for 240x320, 480x800 and 720x1280 screen resolutions. </p>

<p>Since I don't know densities, looks like I should group drawables by screen size. I'm right?
I'm confused, because app should support tablets (which usually are mdpi) and hdpi phones. Or it's not correct design files?</p>
