import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  final TextEditingController _controladorNome = TextEditingController();
  final TextEditingController _controladorQuantidade = TextEditingController();
  final TextEditingController _controladorValor = TextEditingController();

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Cadastrando produto'),
        ),
        body: Column(
          children: <Widget>[
            TextField(
              controller: _controladorNome,
            ),
            TextField(
              controller: _controladorQuantidade,
            ),
            TextField(
              controller: _controladorValor,
            ),
            RaisedButton(
              child: Text('Cadastrar'),
              onPressed: () {},
            )
          ],
        ),
      ),
    );
  }
}