Firstly, take a required image for your react native application. Now, go to any App icon generator tool and upload your saved image there to get the icons folder with respective sub folders containing icon images.

Now, you can download the zip file in your local system and get the folder created for same.

Now, go to your project and go to path— android\app\src\main\res, here you’ll see data as-

the folders above containing app icon images with different size. Now, you can replace these folders with the one you got from your unzipped file.(The folder names will be same as the one in your project).

Once replaced, re-run your app using command “npx react-native run-android” to start your app and the app icon should be updated with the new one.

That’s all required to get your default app icon replaced with the one required as per your requirement.

Thankyou all for reading this blog. Hope its helpful !!