So for the different screen sizes, you have the following sizes for the launcher icons:
ldpi (240 x 320px) icon 36x36, 120dpi
mdpi (320 x 480px) icon 48x48, 160dpi
hdpi (480 x 800px) icon 72x72, 240dpi
xhdpi (720 x 1280px) icon 96x96, 320dpi
(Google Play 512x512)
If you use those sizes without padding, I've noticed that the icons are bigger than for example the ones youtube and facebook use. Does anyone know the size of those icons (or the padding)?
Even better, can I download somewhere templates with the same sizes, such as http://developer.android.com/shareables/icon_templates-v4.0.zip?