调整图像大小以使所有设备看起来相同

Question

I read the http://developer.android.com/guide/practices/screens_support.html and I understood only a few things. So, I have an ImageView with android:src = "@drawable/logo" . The logo.png is placed inside my res/drawable-mdpi and its image-size is 100x100 pixels.

In what dimensions should I save the image in the following folders, so it can look the same in relation to the screen size across all devices?:

- res/drawable-ldpi - res/drawable-hdpi - res/drawable-xhdpi - res/drawable-xxhdpi

Simple things. Is 75x75, 150x150, 200x200, 300x300, the correct answer? Should I bother changing its pixels/inch in my image editor as well?

Answer 1

The magic numbers are 3:4:6:8:12. Those are the proportions you should use for l:m:h:xh:xxh -dpi image resources. For example, your launcher icon should be

• 36x36 for ldpi
• 48x48 for mdpi
• 72x72 for hdpi
• 96x96 for xhdpi
• 144x144 for xxhdpi