I’ve read this article Supporting Multiple Screens, but still don’t get one thing and need an advice.
I have 3 psd files which contains design for 240×320, 480×800 and 720×1280 screen resolutions.
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?
You shouldn’t go by screen resolution, as
You are almost never going to be able to cover all screen sizes, e.g. my phone is.320×480 and my mate’s tablet is 480×960. I bet there’s a dozen more different resolutions; as David Scott pointed in his answer, there are definitions of what “small/normal/large/x-large screens are, however the key words in those definitions are at least: 470×320 is normal screen, but so are 480×320 and 560×480; even if there’s no device today with a particular resolution, there may be one tomorrow.
Even with the same resolution, different pixel density may make your designs look different on different devices.
Hence I suggest that you stick with pixel density and avoid static design.