fittedbox_fittedbox.dart

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        appBar: AppBar(
          title: Text('FittedBox'),
          centerTitle: true,
        ),
        body: Container(
          color: Colors.black,
          alignment: Alignment.center,
          child: FittedBox(
            child: Row(
              children: [
                MyWidget(),
                MyImage(),
              ],
            ),
          ),
        ),
      ),
    );
  }
}

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Container(
      color: Colors.green,
      width: 100,
      height: 100,
    );
  }
}

class MyImage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Image.network(
      'https://images.pexels.com/photos/2131801/pexels-photo-2131801.jpeg?auto=compress&cs=tinysrgb&dpr=1&w=500',
    );
  }
}