Demonstration Scaffold with appBar

Scaffold_appBar.dart

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter/painting.dart';

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

class MyApp extends StatefulWidget {
  MyApp({Key key}) : super(key: key);
  State createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> with SingleTickerProviderStateMixin {
  TabController controller;

  @override
  void initState() {
    super.initState();
    controller = TabController(length: 3, vsync: this);
  }

  @override
  Widget build(BuildContext context) {
    final ThemeData theme = Theme.of(context);
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        appBar: AppBar(
          leading: IconButton(
              icon: Icon(Icons.home),
              tooltip: 'Click to Home Screen',
              onPressed: () {}),
          automaticallyImplyLeading: true,
          title: Text('My Fancy Dress'),
          actions: <Widget>[
            IconButton(
              icon: Icon(Icons.playlist_play),
              tooltip: 'Air it',
              onPressed: () {},
            ),
            IconButton(
              icon: Icon(Icons.playlist_add),
              tooltip: 'Restitch it',
              onPressed: () {},
            ),
            IconButton(
              icon: Icon(Icons.playlist_add_check),
              tooltip: 'Repair it',
              onPressed: () {},
            ),
          ],
            flexibleSpace: Image.network(
              "https://images.pexels.com/photos/531880/pexels-photo-531880.jpeg?auto=compress&cs=tinysrgb&h=350",
                fit: BoxFit.cover,
            ),
          bottom: TabBar(
            tabs: [
              Tab(text: 'Tab 1'),
              Tab(text: 'Tab 2'),
              Tab(text: 'Tab 3'),
            ],
            controller: controller,
          ),
          elevation: 16,
          backgroundColor: theme.primaryColor,
          brightness: theme.primaryColorBrightness,
          iconTheme: theme.primaryIconTheme,
          actionsIconTheme: theme.appBarTheme.actionsIconTheme,
          textTheme: theme.textTheme,
          primary: true,
          shape: StadiumBorder(),
          centerTitle: true,
          toolbarOpacity: 1.0,
          bottomOpacity: 1.0,
        ),
        body: Center(
          child: TabBarView(
            controller: controller,
            children: <Widget>[
              Text("Content for Tab 1"),
              Text("Content for Tab 2"),
              Text("Content for Tab 3"),
            ],
          ),
        ),
      ),
    );
  }
}