Phone screen resolution and image size relationship

Phone screen resolution 320*480, image size 72*72, normal display.
At the screen resolution of 240*320, what is the size of the image (what is the scaling ratio) to display correctly (not distorted, not blurred)?

Generally bigger than your phone screen is all right, but how to maintain proportions, like 320*480 ratio is 0.66, you do the picture, keep this proportion on the line!

320/480=0.66 AH is so calculate ah, next time you do picture to press this proportion to be good, will not deform, out of shape

http://segmentfault.com/q/1010000000425073

Phone Cut Chart

Http://www.mobileui.cn/app-cut-pic-that-things.html


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Phone screen resolution and image size relationship