import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
// This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        home: Scaffold(
          appBar: AppBar(
            backgroundColor: Colors.blue,
            title: Row(
                mainAxisAlignment: MainAxisAlignment.center,
                children: <Widget>[
                  Text(
                    'Título',
                    style: TextStyle(color: Colors.white),
                  ),
                ]),
          ),
          body:
           Center(
             child: Text('David Gama')
    ),
    )
    );
  }
}