Every Android mobile application usually comes with unique app icon associated with it by the Android Developer. An app icon visually represents a mobile application on the screen of user’s device, or in any app store, for example, Figure 1 shows app icons for various applications on the screen.
Figure 1
It is therefore a good idea to have an image designed for the Android application that you are building. The dimension of the app icon could be 512 x 512 pixel. You can then add the app icon to your Android project to replace the default launcher icon associated with app projects in Android Studio.