main.dart

import 'package:flutter/material.dart';

final Color darkBlue = Color.fromARGB(255, 18, 32, 47);

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Center(
          child: MyWidget(),
        ),
      ),
    );
  }
}

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: ListView(
        children: <Widget>[
          Container(
            height: 300, // <- Se comentar essa altura, a listView desaparece
            child: ListView(
              scrollDirection: Axis.horizontal,
              children: <Widget>[
                Column(children: <Widget>[
                  Container(
                    height: 30,
                    width: 80,
                    color: Colors.red,
                    child: Text('Ala'),
                  ),
                  Container(
                    color: Colors.red,
                    child: Text('1'),
                  ),
                ]),
                Column(children: <Widget>[
                  Container(
                    height: 30,
                    width: 80,
                    color: Colors.red,
                    child: Text('1'),
                  ),
                  Container(
                    color: Colors.red,
                    child: Text('1'),
                  ),
                ]),
                Column(children: <Widget>[
                  Container(
                    height: 30,
                    width: 80,
                    color: Colors.red,
                    child: Text('1'),
                  ),
                  Container(
                    color: Colors.red,
                    child: Text('1'),
                  ),
                ]),
                Column(children: <Widget>[
                  Container(
                    height: 30,
                    width: 80,
                    color: Colors.red,
                    child: Text('1'),
                  ),
                  Container(
                    color: Colors.red,
                    child: Text('1'),
                  ),
                ]),
                Column(children: <Widget>[
                  Container(
                    height: 30,
                    width: 80,
                    color: Colors.red,
                    child: Text('1'),
                  ),
                  Container(
                    color: Colors.red,
                    child: Text('1'),
                  ),
                ]),
                Column(children: <Widget>[
                  Container(
                    height: 30,
                    width: 80,
                    color: Colors.red,
                    child: Text('1'),
                  ),
                  Container(
                    color: Colors.red,
                    child: Text('1'),
                  ),
                ]),
                Column(children: <Widget>[
                  Container(
                    height: 30,
                    width: 80,
                    color: Colors.red,
                    child: Text('1'),
                  ),
                  Container(
                    color: Colors.red,
                    child: Text('1'),
                  ),
                ]),
                Column(children: <Widget>[
                  Container(
                    height: 30,
                    width: 80,
                    color: Colors.red,
                    child: Text('1'),
                  ),
                  Container(
                    color: Colors.red,
                    child: Text('1'),
                  ),
                ]),
                Column(children: <Widget>[
                  Container(
                    height: 30,
                    width: 80,
                    color: Colors.red,
                    child: Text('1'),
                  ),
                  Container(
                    color: Colors.red,
                    child: Text('1'),
                  ),
                ]),
                Column(children: <Widget>[
                  Container(
                    height: 30,
                    width: 80,
                    color: Colors.red,
                    child: Text('1'),
                  ),
                  Container(
                    color: Colors.red,
                    child: Text('1'),
                  ),
                ]),
                Column(children: <Widget>[
                  Container(
                    height: 30,
                    width: 80,
                    color: Colors.red,
                    child: Text('1'),
                  ),
                  Container(
                    color: Colors.red,
                    child: Text('1'),
                  ),
                ]),
                Column(children: <Widget>[
                  Container(
                    height: 30,
                    width: 80,
                    color: Colors.red,
                    child: Text('1'),
                  ),
                  Container(
                    color: Colors.red,
                    child: Text('1'),
                  ),
                ]),
              ],
            ),
          )
        ],
      ),
    );
  }
}