Flutter Tutorial on the use of select widgets

gistfile1.txt

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(
      title: 'Custom5',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: Custom(),
    );
  }
}

class Custom extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.white,
      appBar: AppBar(
        backgroundColor: Colors.deepOrangeAccent,
        title: Text('Building Widgets'),
        actions: <Widget>[
          Padding(
            padding: const EdgeInsets.only(right: 10),
            child: Icon(
              Icons.search,
              color: Colors.white,
            ),
          ),
          Padding(
            padding: const EdgeInsets.only(right: 10),
            child: Icon(
              Icons.more_vert,
              color: Colors.white,
            ),
          )
        ],
      ),
      body: Container(
        child: Column(
          children: <Widget>[
            ListTile(
              leading: FlutterLogo(),
              title: Text(
                'Fluttering Flutter',
                style: TextStyle(
                    fontSize: 14,
                    fontWeight: FontWeight.w500,
                    color: Colors.black),
              ),
              subtitle: Row(
                mainAxisAlignment: MainAxisAlignment.start,
                crossAxisAlignment: CrossAxisAlignment.center,
                children: <Widget>[
                  Text(
                    '+234 812 345 6789: ',
                    style: TextStyle(
                        fontSize: 14,
                        fontWeight: FontWeight.w400,
                        color: Colors.grey),
                  ),
                  Expanded(
                    child: Text(
                      'Flutter is interesting!',
                      style: TextStyle(
                          fontSize: 14,
                          fontWeight: FontWeight.w400,
                          color: Colors.grey),
                      overflow: TextOverflow.ellipsis,
                      maxLines: 1,
                    ),
                  )
                ],
              ),
              trailing: Text(
                '10:08 PM',
                style: TextStyle(
                    fontSize: 14,
                    fontWeight: FontWeight.w400,
                    color: Colors.grey),
              ),
            ),
            SizedBox(
              height: 20,
            ),
            FlatButton(
              onPressed: () {
                print('This BUTTON is useless');
              },
              child: Text(
                'DO NOTHING',
                style: TextStyle(color: Colors.deepOrangeAccent, fontSize: 16),
              ),
              splashColor: Colors.deepOrangeAccent,
            ),
            IconButton(
                icon: Icon(
                  Icons.arrow_back,
                  color: Colors.black,
                ),
                onPressed: () {
                  print('I am an IconButton');
                }),
            Image.network(
              'https://picsum.photos/250?image=9',
            ),
          ],
        ),
      ),
    );
  }
}