Changing icon in flutter

// First add a custom icon in assets/icon folder
- assets/icon/icon.png

// In pubspec.yaml, add dependency 
  flutter_launcher_icons: ^0.8.1

// Then write these lines below them from extreme left
flutter_icons:
  image_path: "assets/icon/icon.png"
  android: true
  ios: true
  
  // Now, in terminal, write a few commands
  > flutter pub get
  > flutter pub run flutter_launcher_icons:main