Assets

Images

../pubspec.yaml
../images/penguin.png

Ausführung

pubspec.yaml:

name: untitled
description: A new Flutter project.
...
flutter:
  ...
  uses-material-design: true
  ...
  assets:
    - images/penguin.png
...

main.dart:

import 'package:flutter/material.dart';

void main() {
  runApp(const MaterialApp(home: Scaffold(body: ExampleWidget())));
}

class ExampleWidget extends StatelessWidget {
  const ExampleWidget({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return const Image(image: AssetImage('images/penguin.png'));
  }
}