http://developer.android.com/guide/practices/ui_guidelines/icon_design_launcher.html
http://forumone.com/blogs/post/how-publish-your-mobile-app-google-play-and-apple-app-stores
http://forumone.com/blogs/post/how-publish-your-mobile-app-google-play-and-apple-app-stores
Size and Format
Launcher icons should be 32-bit PNGs with an alpha channel for transparency. The finished launcher icon dimensions corresponding to a given generalized screen density are shown in the table below.
Table 1. Summary of finished launcher icon dimensions for each generalized screen density.
ldpi (120 dpi)(Low density screen) | mdpi (160 dpi)(Medium density screen) | hdpi (240 dpi)(High density screen) | xhdpi (320 dpi)(Extra-high density screen) | |
|---|---|---|---|---|
| Launcher Icon Size | 36 x 36 px | 48 x 48 px | 72 x 72 px | 96 x 96 px |
You can also include a few pixels of padding in launcher icons to maintain a consistent visual weight with adjacent icons. For example, a 96 x 96 pixel
xhdpi launcher icon can contain a 88 x 88 pixel shape with 4 pixels on each side for padding. This padding can also be used to make room for a subtle drop shadow, which can help ensure that launcher icons are legible across on any background color.Application Icons on Google Play
If you are publishing your app on Google Play, you will also need to provide a 512 x 512 pixel, high-resolution application icon in the developer console at upload time. This icon will be used in various locations on Google Play and does not replace your launcher icon.
For tips and recommendations on creating high-resolution launcher icons that can easily be scaled up to 512x512, see Tips for Designers.
For information and specifications about high-resolution application icons on Google Play, see the following article: