问题
I want my application components to look in a scaling mechanism. Means image size must look in proportion with screen size.
I know that to use 4 different drawable folders.
Considering hdpi as base (480 x 800) ratio would be:
mdpi 66.66% hdpi 100% xhdpi 133.33%
however xhdpi size accoring to above ration is 640 x 1060. But samsung s3 screen size is 720 x 1280
So suppose If I have image of 100 x 100 in hdpi, and so 133 x 133 in xhdpi
But after applying above rule, Image in samsung s3 not looking proportionality with screen size as image size is based on xhdpi (133 x 133).
Same problem in hdpi with 480 x 854 screen size. Suppose I have to display images on screen, how to filled up that 54 px gap? as our images are based on 480 x 800 in hdpi folder .
So my question is how can we get smaller image for smaller screen size and bigger image for bigger screen size so that all layout and images looks in proportional with screen size?
回答1:
If you do not compromise not even with a fewer pixels on the screen then it would be ideal for you to use
layout-sw720dp folder for Samsung S3
More info is provided in the official documentation
below are some typical screen widths to be used
res/layout/main_activity.xml # For handsets (smaller than 600dp available width)
res/layout-sw600dp/main_activity.xml # For 7” tablets (600dp wide and bigger)
res/layout-sw720dp/main_activity.xml # For 10” tablets (720dp wide and bigger)
and make your drawable folder like below
xhdpi: 720x1280
large-hdpi: 640x960
hdpi: 480x640
mdpi: 320x480
ldpi: 240x320
来源：https://stackoverflow.com/questions/19172502/android-maintain-same-proportion-for-all-different-screen-sizes-and-resolution