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E-raamat: Flutter in Action

3.83/5 (65 hinnangut Goodreads-ist)

Eric Windmill

Formaat: 368 pages
Ilmumisaeg: 07-Jan-2020
Kirjastus: Manning Publications
Keel: eng
ISBN-13: 9781638356431

Teised raamatud teemal:

Mobile & handheld device programming / Apps programming

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Formaat: 368 pages
Ilmumisaeg: 07-Jan-2020
Kirjastus: Manning Publications
Keel: eng
ISBN-13: 9781638356431

Teised raamatud teemal:

Mobile & handheld device programming / Apps programming

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In 2017, consumers downloaded 178 billion apps, and analysts predict growth to 258 billion by 2022. Mobile customers are demanding more-and better-apps, and it's up to developers like you to write them! Flutter, a revolutionary new cross-platform software development kit created by Google, makes it easier than ever to write secure, high-performance native apps for iOS and Android.

Flutter in Action teaches you to build awesome, full-featured mobile applications with Flutter. Author Eric Windmill walks with you every step of the way as you build apps that get you coding as you learn. With the engaging hands-on examples, you'll create a basic user interface, learn about state management, and integrate a database with a Dart web app.

Purchase of the print book includes a free eBook in PDF, Kindle, and ePub formats from Manning Publications.

Summary

In 2017, consumers downloaded 178 billion apps, and analysts predict growth to 258 billion by 2022. Mobile customers are demanding more&;and better&;apps, and it&;s up to developers like you to write them! Flutter, a revolutionary new cross-platform software development kit created by Google, makes it easier than ever to write secure, high-performance native apps for iOS and Android. Flutter apps are blazingly fast because this open source solution compiles your Dart code to platform-specific programs with no JavaScript bridge! Flutter also supports hot reloading to update changes instantly. And thanks to its built-in widgets and rich motion APIs, Flutter&;s apps are not just highly responsive, they&;re stunning!

Purchase of the print book includes a free eBook in PDF, Kindle, and ePub formats from Manning Publications.

About the technology

With Flutter, you can build mobile applications using a single, feature-rich SDK that includes everything from a rendering engine to a testing environment. Flutter compiles programs written in Google&;s intuitive Dart language to platform-specific code so your iOS and Android games, utilities, and shopping platforms all run like native Java or Swift apps.

About the book

Flutter in Action teaches you to build professional-quality mobile applications using the Flutter SDK and the Dart programming language. You&;ll begin with a quick tour of Dart essentials and then dive into engaging, well-described techniques for building beautiful user interfaces using Flutter&;s huge collection of built-in widgets. The combination of diagrams, code examples, and annotations makes learning a snap. As you go, you&;ll appreciate how the author makes easy reading of complex topics like routing, state management, and async programming.

What's inside

    Understanding the Flutter approach to the UI
    All the Dart you need to get started
    Creating custom animations
    Testing and debugging

About the reader

You&;ll need basic web or mobile app development skills.

About the author

Eric Windmill is a professional Dart developer and a contributor to open-source Flutter projects. His work is featured on the Flutter Showcase page.

Table of Contents:

PART 1 - MEET FLUTTER

1 ¦ Meet Flutter

2 ¦ A brief intro to Dart

3 ¦ Breaking into Flutter

PART 2 - FLUTTER USER INTERACTION, STYLES, AND ANIMATIONS

4 ¦ Flutter UI: Important widgets, themes, and layout

5 ¦ User interaction: Forms and gestures

6 ¦ Pushing pixels: Flutter animations and using the canvas

PART 3 - STATE MANAGEMENT AND ASYNCHRONOUS DART

7 ¦ Flutter routing in depth

8 ¦ Flutter state management

9 ¦ Async Dart and Flutter and infinite scrolling

PART 4 - BEYOND FOUNDATIONS

10 ¦ Working with data: HTTP, Firestore, and JSON

11 ¦ Testing Flutter apps

Foreword

Preface

xvii

Acknowledgments

xix

About This Book

xxi

About The Author

xxiv

About The Cover Illustration

xxv

Part 1 Meet Flutter

(94)

1 Meet Flutter

(21)

1.1 Why does Flutter use Dart?

(1)

1.2 On Dart

(1)

1.3 Who uses Flutter?

(1)

1.4 Who should be using Flutter?

(2)

Teams, project leads, and CTOs

(1)

Individual developers

(1)

Code school students and recent CS grads

(1)

Open source developers

(1)

People who value speed

(1)

People who are lazy

(1)

People who value control

(1)

1.5 Who this book is for

(1)

1.6 Other mobile development options

(2)

Native development (iOS and Android)

(1)

Cross-platform JavaScript options

(2)

1.7 The immediate benefits of Flutter

(2)

No JavaScript bridge

(1)

Compile time

(1)

Write once, test once, deploy everywhere

(1)

Code sharing

(1)

Productivity and collaboration

(1)

Code maintenance

(1)

The bottom line: Is Flutter for you?

(1)

1.8 Future benefits of Flutter: Web apps and desktop apps

(1)

1.9 A brief intro to how Flutter works

(6)

Everything is a widget

(1)

Composing UI with widgets

(1)

Widget types

(2)

1.10 Flutter rendering: Under the hood

(4)

Composing the widget tree and layout

(1)

Compositing step

(1)

Paint to the screen

(1)

1.11 Final note

(2)

2 A brief intro to Dart

(30)

2.1 Hello, Dart!

(4)

Anatomy of a Dart program

(1)

Adding more greetings

(2)

I/O and Dart libraries

(1)

2.2 Common programming concepts in Dart

(7)

Intro to Dart's type system

(2)

Comments

(1)

Variables and assignment

(1)

Operators

(1)

Null-aware operators

(2)

2.3 Control flow

(5)

if and else

(1)

switch and case

(1)

Advanced switch usage

(2)

Loops

(1)

2.4 Functions

(4)

Anatomy of a Dart function

(1)

Parameters

(1)

Default parameter values

(1)

Advanced function concepts

(2)

Lexical scope

(1)

2.5 Object-oriented programming (in Dart)

(9)

Classes

(2)

Constructors

(1)

Inheritance

(1)

Factories and named constructors

(1)

Enumerators

(3)

3 Breaking into Flutter

(41)

3.1 Intro to the counter app

(5)

Flutter project structure

(1)

Anatomy of a Flutter app

(1)

Again, everything is a widget

(1)

The build method

(1)

The new and const constructors in Flutter

(1)

Hot reload

(1)

3.2 Widgets: The widget tree, widget types, and the State object

(7)

Stateless widgets

(1)

Stateful widgets

(2)

setState

(2)

initState

(1)

3.3 BuildContext

(1)

3.4 Enhancing the counter app with the most important widgets

(1)

RaisedButton

(1)

3.5 Favor composition in Flutter (over inheritance)

(3)

What is composition?

(2)

An example of composition in Flutter

(1)

3.6 Intro to layout in Flutter

(11)

Row and Column

(2)

Layout constraints in Flutter

(1)

RenderObject

(1)

RenderObject and constraints

(1)

RenderBoxes and layout errors

(1)

Multi-child widgets

(2)

Icons and the FloatingActionButton

(2)

Images

(1)

Container widget

(2)

3.7 The element tree

(9)

Elements and widgets

(1)

Exploring the element tree with an example

(2)

The element tree and State objects

(2)

Widget keys

(2)

3.8 A final note

(3)

Part 2 Flutter User Interaction, Styles, And Animations

(94)

4 Flutter UI: Important widgets, themes, and layout

(32)

4.1 Setting up and configuring a Flutter app

(3)

Configuration: pubspec.yaml and main.dart

(2)

SystemChrome

101

(1)

4.2 Structural widgets and more configuration

102

(6)

MaterialApp widget

102

(2)

The Scaffold widget

104

(2)

AppBar widget

106

(2)

4.3 Styling and themes in Flutter

108

(4)

Theme widget

108

(2)

Media Query and the of method

110

(1)

ScreenAwareSize method

111

(1)

4.4 Common layout and UI widgets

112

(14)

Stack widget

112

(4)

Table widget

116

(6)

TabBar widget

122

(4)

4.5 ListView and builders

126

(3)

5 User interaction: Forms and gestures

129

(29)

5.1 User interaction and gestures

130

(6)

The GestureDetector widget

130

(1)

GestureDetector in practice

131

(3)

The Dismissible widget

134

(2)

5.2 Flutter forms

136

(5)

The Form widget

137

(1)

GlobalKey<FormState>

138

(1)

The structure of the AddCityPage form

138

(2)

Implementing the form in the weather app

140

(1)

5.3 FormField widgets

141

(6)

The TextFormField widget

142

(1)

The DropdownFormButton widget

143

(3)

Generic form fields

146

(1)

5.4 Form UI and working with focus nodes

147

(4)

InputDecoration

147

(2)

Improving the UI with FocusNodes

149

(2)

5.5 Managing form state with form methods

151

(7)

Form.onChange

152

(1)

FormState.save

153

(2)

Form.onWillPop

155

(3)

6 Pushing pixels: Flutter animations and using the canvas

158

(31)

6.1 Introducing Flutter animations

159

(13)

Tweens

160

(1)

Animation curves

161

(1)

Ticker providers

162

(1)

AnimationController

162

(1)

Animated Widget

163

(3)

Implementing the animation controller and tween for the background

166

(6)

6.2 CustomPainter and the canvas

172

(7)

The shapes used to make up the clouds

173

(1)

Defining the CustomPainter and the Paint object

173

(2)

The CustomPainter paint method

175

(4)

6.3 Staggered animations, TweenSequence, and built-in animations

179

(8)

Creating a custom animation state class

179

(3)

Built-in animation widgets: SlideTransition

182

(2)

Building animations for the Clouds widget

184

(1)

TweenSequence

185

(2)

6.4 Reusable custom color transition widgets

187

(2)

Part 3 State Management And Asynchronous Dart

189

(76)

7 Flutter routing in depth

191

(21)

7.1 Routing in Flutter

192

(1)

The Farmers Market app

192

(1)

The app source code

193

(1)

7.2 Declarative routing and named routes

193

(11)

Declaring routes

194

(1)

Navigating to named routes

195

(2)

MaterialDrawer widget and the full menu

197

(1)

Menu items and the appropriate widgets: List View and Listltems

198

(3)

NavigatorObserver: Highlighting the active route with RouteAware

201

(3)

7.3 Routing on the fly

204

(5)

MaterialRouteBuilder

204

(1)

showSnackBar, showBottomSheet, and the like

205

(4)

7.4 Routing animations

209

(3)

8 Flutter state management

212

(24)

8.1 Deep dive into StatefulWidgets

213

(3)

The widget tree and the element tree

213

(1)

The StatefulWidget lifecycle and when to do what

214

(2)

8.2 Pure Flutter state management: The InheritedWidget

216

(9)

Creating a Central Store wth an InheritedWidget/StatefulWidget team

218

(1)

The inheritFromWidget0fExactType and of methods

218

(4)

Use the of method to lift up state

222

(2)

State management patterns beyond Flutter

224

(1)

8.3 Blocs: Business Logic Components

225

(11)

How do blocs work?

227

(1)

Implementing the bloc architecture

228

(3)

Intro to streams and async Dart

231

(1)

Implementing streams in the CartBloc

232

(4)

9 Async Dart and Flutter and infinite scrolling

236

(29)

9.1 Async Dart

237

(5)

Future recap

237

(2)

The async/await keywords

239

(1)

Catching errors with futures

240

(1)

Catching errors with try and catch

241

(1)

9.2 Sinks and streams (and StreamControllers)

242

(8)

Anatomy of the observer pattern with Dart streams

243

(1)

Implementing streams

243

(2)

Broadcasting streams

245

(2)

Higher-order streams

247

(3)

9.3 Using streams in blocs

250

(4)

Blocs use inputs and outputs

250

(3)

Implementing a bloc input

253

(1)

9.4 Async Flutter: StreamBuilder

254

(1)

9.5 Infinite and custom scrollable widgets

255

(12)

CustomScrollView and slivers

256

(1)

Catalog widget scroll view

256

(4)

The SliverGrid widget

260

(1)

Delegates

260

(1)

Custom slivers

261

(4)

Part 4 Beyond Foundations

265

(48)

10 Working with data: HTTP, Firestore, and JSON

267

(25)

10.1 HTTP and Flutter

268

(2)

HTTP package

269

(1)

GET requests

269

(1)

10.2 JSON serialization

270

(11)

Manual serialization

271

(4)

Auto-generated JSON serialization

275

(1)

Updating the Todo class

275

(2)

Bringing it all together in the UI

277

(4)

10.3 Working with Firebase in Flutter

281

(7)

Installing Firestore

282

(1)

Create a Firestore project

283

(1)

Configure your app

283

(3)

Add Firebase to your pubspec

286

(1)

Using Firestore

286

(2)

10.4 Dependency injection

288

(4)

11 Testing Flutter apps

292

(21)

11.1 Tests in Flutter

293

(17)

Dart unit tests

293

(4)

Using mockito to test methods that need external dependencies

297

(3)

Flutter widget tests

300

(3)

Flutter integration tests

303

(4)

Performance profiling integration tests

307

(3)

11.2 Accessibility with the semantics widgets

310

(1)

11.3 Next steps with Flutter

311

(2)

Appendix A Installation: Dart2

313

(5)

Appendix B The Pub package manager

318

(3)

Appendix C Rutter for web developers

321

(3)

Appendix D Rutter for iOS developers

324

(4)

Appendix E Flutter for Android developers

328

(3)

Index

331

Eric Windmill is a professional Dart developer, a contributor to opensource Flutter projects, and the author of FlutterByExample.com. His work is featured on Flutters own showcase page, https://flutter.io/showcase.

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