Change Icon Size Android Application. The default icon is of same name, same size and format can also be changed. It is the screen density that determines the android icon size used.
Android icon size & screen densities: With android nougat, google incorporated a new feature: Icon can be chosen from gallery and lots of icon packs.
There are two ways in which you can change android icons.
In order to change your application icon file, you must modify the android:icon key in the applcation tag. With android nougat, google incorporated a new feature: Launcher icon represents your application & appear on the home screen. 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).