Standard Icon Size For Android App. Since 22×22 is the smallest size the icon will be viewed at, it’s ideal to design the icon at this size first so you can ensure the design will be clear and identifiable at its smallest size. By maintaining this ratio, any changes to the original will be scaled up or down proportionally, which preserves sharp edges and correct alignment when the scale is returned to 100% (48dp).
Original icon asset, new icon asset (recommended adaptation), new icon rendered on google play. This site has a wide range of standard icons in many categories suited for mobile apps and games. Legacy mode original icon assets that have not been updated per the new specifications will eventually be migrated to legacy mode and scaled down 75% to the keyline grid size (512 * 0.75 = 384px).
Action bar, dialog & tab icons.
For example, consider that the size for a launcher icon is specified to be 48x48 dp. Creating customized icons is easy: They offer a free collection of the vector icon pack that you can download right away. Depending on the device, you accomplish this by multiplying the number of pixels in each image by a specific scale factor.
