什么应该是默认的启动器图标大小

Question

I refer to the documentation at http://developer.android.com/guide/practices/ui_guidelines/icon_design.html#icon-sets

Hence, I plan to have the following directory structures.

res/
    drawable/   
        icon.png (? x ? px)
    drawable-ldpi/  
        icon.png (36x36 px)
    drawable-mdpi/  
        icon.png (48x48 px)
    drawable-hdpi/  
        icon.png (72x72 px)

However, I cannot find any documentation, to mention the size of default launcher icon size.

May I know what should be the default launcher icon size?

Answer 1

Android icon sizes

ldpi : 36x36px (120 dpi / 47 dpcm)
mdpi : 48x48px (160 dpi / 62 dpcm)
hdpi : 72x72px (240 dpi / 94 dpcm)
xhdpi : 96x96px (320 dpi / 126 dpcm)
xxhdpi : 144x144px (480 dpi / 189 dpcm)
xxxhdpi : 192x192px (640 dpi / 252 dpcm)

dip : 48x48dip (dip = dp)

mm : 76 mm (depends on the real device dpi)

iPhone icon sizes (dpi is a bit different on iPads)

non-retina : 57x57px (163 dpi / 64 dpcm)
retina : 114x114px (326 dpi / 128 dpcm)

mm : 89 mm

Answer 2

如果你已经填充了drawable-ldpi/ drawable-mdpi/和drawable-hdpi/ with启动器图标，我认为你不需要在drawable/目录中提供图像。

Answer 3

The Android icon guidelines say that the baseline should be assumed to be mdpi, so if you're using the default drawable directory, images should be designed according to those guidelines (48x48 for launcher icons). According to the documentation:

The system assumes that default resources are designed for the baseline screen size and density, which is a normal screen size and a medium density. (from http://developer.android.com/guide/practices/screens_support.html )

There's a bit of information there regarding when images from the default drawable directory are used too, but nothing specific.

Answer 4

Maybe the following link will help you

http://developer.android.com/guide/practices/ui_guidelines/icon_design_launcher.html#size5

According to Icon Design launcher:

Launcher icon dimensions for high-density (hdpi) screens:

Full Asset: 72 x 72 px

Icon: 60 x 60 px

Square Icon: 56 x 56 px

Launcher icon dimensions for medium-density (mdpi) screens:

Full Asset: 48 x 48 px

Icon: 40 x 40 px

Square Icon: 38 x 38 px

Launcher icon dimensions for low-density (ldpi) screens:

Full Asset: 36 x 36 px

Icon: 30 x 30 px

Square Icon: 28 x 28 px

Answer 5

根据http://developer.android.com/design/style/iconography.html ，默认启动器图标大小应为48 x 48像素。