Creating Android and Ios APP Icons and Splash Screens
These 2 Websites will do the job for you.
Creating .aab bundle and updating your Android app on Google Play Console
Please follow the steps! Step 1 – Open your project folder android/app/build.gradle and under defaultConfig update versionCode and versionName Increment your previous versionCode and versionName by 1.
Solved – Version code 1 or X has already been used. Try another version code – Android App Upload error
You need to update version code in app/build.gradle file. You need to simply increase versionCode and versionName from previous details. If it says versioCode 1 is already been used, change it to 2 in defaultConfig. Almost everyone new to app development faces this issue and this is part of learning Mobile application.