What size should Android notification icons have before Gingerbread HDPI?

Question

What size should Android notification icon icons have before Gingerbread HDPI?

In the documentation, he says for MDPI 25x25 with a 2-pixel safe block, i.e. 21x21:

http://developer.android.com/guide/practices/ui_guidelines/icon_design_status_bar.html

Using standard 50% scaling for HDPI, 21 * 1.5 = 31.5. So should they be 32x32 + 3 + 3 = 38x38, or 31x31 + 3 + 3 = 37x37? I want a value that will not automatically scale :-)

Answer 1

The table in this link has values:
19 x 19 px
25 x 25 px
38 x 38 px

Answer 2

... , Google 4.0. , , .

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http://petrnohejl.imtqy.com/Android-Cheatsheet-For-Graphic-Designers/

Answer 3

, : http://android-ui-utils.googlecode.com/hg/asset-studio/dist/index.html#group-icon-generators

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, : http://petrnohejl.imtqy.com/Android-Cheatsheet-For-Graphic-Designers/#screen-densities-and-icon-dimensions