demo

main.dart

// Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  final String title;

  const MyHomePage({
    Key? key,
    required this.title,
  }) : super(key: key);

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Padding(
          padding: const EdgeInsets.all(16.0),
          child: Row(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Expanded(
                child: TextFormField(
                  decoration: const InputDecoration(
                    labelText: 'Idade',
                    border: OutlineInputBorder(),
                    errorText: 'Informar',
                  ),
                ),
              ),
              const SizedBox(width: 16),
              Expanded(
                child: SizedBox(
                  height: 52,
                  child: TextFormField(
                    decoration: const InputDecoration(
                      labelText: 'Idade',
                      border: OutlineInputBorder(),
                      errorText: 'Informar',
                    ),
                  ),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}