Question

I know there are guidelines for creating icons for specific areas in Android (Tab, List, etc.) and how you would size them according to ldpi, mdpi, hdpi etc.

Are there any rules on how to scale other in-app icons?

I’ve got a ‘tiny’ icon of 10×10 px which I am using on my mdpi dev phone, what would be the scaling rules to create ldpi, hdpi & xhdpi versions of that icon?

Thanks

Dave

Answer 1

The ratios are .75|1|1.33|1.5|2.|3.|4. (or 3:4:6:8:12:16) That is, for your 10x10px bitmap, the graphics would be

ldpi    - 10x10 * 0.75 = 7x7
mdpi    - 10x10 * 1    = 10x10
tvdpi   - 10x10 * 1.33 = 13x13
hdpi    - 10x10 * 1.5  = 15x15
xhdpi   - 10x10 * 2    = 20x20
xxhdpi  - 10x10 * 3    = 30x30
xxxhdpi - 10x10 * 4    = 40x40