Building widgets

To create a user interface in Flutter, you override the build method on widget objects. All widgets must have a build method, and it must return another widget. For example, if you want to add text to the screen with some padding, you could write it like this:

class PaddedText extends StatelessWidget {
  const PaddedText({super.key});

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.all(8.0),
      child: const Text('Hello, World!'),
    );
  }
}

The framework calls the build method when this widget is created and when the dependencies of this widget change (such as state that is passed into the widget).