import 'package:flutter/material.dart';

void main() => runApp(
      MaterialApp(
        home: Scaffold(
          appBar: AppBar(
            title: Text('AppBar Title'),
            centerTitle: true,
          ),
          body: Center(
            child: Row(
              mainAxisAlignment: MainAxisAlignment.spaceEvenly,
              children: [
                Text('Hello Flutter World!'),
                RaisedButton(
                  child: Text('I am a Button'),
                  onPressed: () {},
                ),
                IconButton(
                  icon: Icon(Icons.thumb_up),
                  color: Colors.blue,
                  onPressed: () {},
                ),
              ],
            ),
          ),
        ),
      ),
    );