UI Design

For tips on how to create and manage icon sets for multiple densities, see Tips for Designers.

Table 1. Summary of finished icon dimensions for each of the three generalized screen densities, by icon type.

Icon Type	Standard Asset Sizes (in Pixels), for Generalized Screen Densities
	Low density screen (ldpi)	Medium density screen (mdpi)	High density screen (hdpi)
Launcher	36 x 36 px	48 x 48 px	72 x 72 px
Menu	36 x 36 px	48 x 48 px	72 x 72 px
Status Bar (Android 2.3 and later)	12w x 19h px (preferred, width may vary)	16w x 25h px (preferred, width may vary)	24w x 38h px (preferred, width may vary)
Status Bar (Android 2.2 and below)	19 x 19 px	25 x 25 px	38 x 38 px
Tab	24 x 24 px	32 x 32 px	48 x 48 px
Dialog	24 x 24 px	32 x 32 px	48 x 48 px
List View	24 x 24 px	32 x 32 px	48 x 48 px

Try to name files so that related assets will group together inside a directory when they are sorted alphabetically. In particular, it helps to use a common prefix for each icon type. For example:

Asset Type	Prefix	Example
Icons	ic_	ic_star.png
Launcher icons	ic_launcher	ic_launcher_calendar.png
Menu icons	ic_menu	ic_menu_archive.png
Status bar icons	ic_stat_notify	ic_stat_notify_msg.png
Tab icons	ic_tab	ic_tab_recent.png
Dialog icons	ic_dialog	ic_dialog_info.png

Note that you are not required to use a shared prefix of any type — doing so is for your convenience only.