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E-raamat: Beginning App Development with Flutter: Create Cross-Platform Mobile Apps

3.61/5 (23 hinnangut Goodreads-ist)

Rap Payne

Formaat: PDF+DRM
Ilmumisaeg: 04-Dec-2019
Kirjastus: APress
Keel: eng
ISBN-13: 9781484251812

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Formaat: PDF+DRM
Ilmumisaeg: 04-Dec-2019
Kirjastus: APress
Keel: eng
ISBN-13: 9781484251812

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Create iOS and Android apps with Flutter using just one codebase. App development on multiple platforms has historically been difficult and complex. This book breaks down complex concepts and tasks into easily digestible segments with examples, pictures, and hands-on labs with starters and solutions.

In doing so, you'll develop a basic understanding of the Dart programming language; the entire Flutter development toolchain; the differences between stateful and stateless widgets; and a working knowledge of the architecture of apps. All the most important parts of app development with Flutter are covered in this book. Work with themes and styles. Develop custom widgets. Teach your app to respond to gestures like taps, swipes, and pinches. Design, create and control the layout of your app. Create tools to handle form data entry from users. And ultimately create killer multiscreen apps with navigation, menus, and tabs.

Flutter is Google's new framework for creating mobile apps that run on iOS and Android phones both.You had to be a super-developer to write apps for iOS or Android alone. But writing for both? Forget about it! You had to be familiar with Swift, Java/Kotlin, Xcode, Eclipse, and a bunch of other technologies simultaneously. Beginning App Development with Flutter simplifies the entire process.

What You'll Learn

Get the most out of great Flutter widgets

Create custom widgets, both stateless and stateful Exercise expert control over your Flutter layouts Make your app respond to gestures like swiping, pinching and tapping Initiate async Ajax calls to RESTful APIs including Google Firebase!

Who This Book Is ForDevelopers who have coded in Java, C#, C++, or any similar language. It brings app development within the reach of younger developers, so STEM groups are likely to pick up the technology. Managers, product owners, and business analysts need to understand Flutter's capabilities.

About the Author

xvii

About the Technical Reviewer

xix

Who is this book for?

xxi

Part I Introduction to Flutter

(28)

Chapter 1 Hello Flutter

(6)

What is Flutter?

(1)

Why Flutter?

(1)

The other options

(2)

Native solutions

(1)

Conclusion

(1)

Chapter 2 Developing in Flutter

(20)

The Flutter toolchain

(8)

The Flutter SDK

(1)

IDEs

(2)

IDE DevTools

(1)

Emulators

(2)

Keeping the tools up to date

(3)

The Flutter development process

(9)

Scaffolding the app and files

(3)

Running your app

(6)

Conclusion

(2)

Part II Foundational Flutter

(176)

Chapter 3 Everything Is Widgets

(16)

UI as code

(2)

Built-in Flutter widgets

(1)

Value widgets

(1)

Layout widgets

(1)

Navigation widgets

(1)

Other widgets

(1)

How to create your own stateless widgets

(7)

Widgets have keys

(1)

Passing a value into your widget

(3)

Stateless and Stateful widgets

(1)

So which one should I create?

(1)

Conclusion

(1)

Chapter 4 Value Widgets

(30)

The Text widget

(1)

The Icon widget

(1)

The Image widget

(5)

Embedded images

(1)

Network images

(1)

Sizing an image

(3)

Input widgets

(22)

Text fields

(10)

Putting the form widgets together

(1)

Form widget

(2)

FormField widget

(4)

One big Form example

(5)

Conclusion

(1)

Chapter 5 Responding to Gestures

(16)

Meet the button family

(5)

RaisedButton

(1)

FlatButton and IconButton

(1)

FloatingActionButton

(1)

CupertinoButton

(1)

Dismissible

(1)

Custom gestures for your custom widgets

(4)

Step 1 Decide on your gestures and behaviors

(1)

Step 2 Create your custom widget

(1)

Step 3 Add a GestureDetector widget

(1)

Step 4 Associate your gesture with its behavior

(1)

Example 1 Reacting to a long press

(2)

Example 2 Pinching to add a new item

(1)

Example 3 Swiping left or right

(2)

What if there are two or more gestures happening at the same time?

(1)

Conclusion

(1)

Chapter 6 Laying Out Your Widgets

(46)

Laying out the whole scene

100

(6)

MaterialApp widget

100

(1)

The Scaffold widget

101

(1)

The AppBar widget

102

(2)

SafeArea widget

104

(1)

SnackBar widget

105

(1)

How Flutter decides on a widget's size

106

(4)

The dreaded "unbounded height" error

107

(1)

Flutter's layout algorithm

108

(2)

Putting widgets next to or below others

110

(3)

Your widgets will never fit!

113

(1)

What if there's extra space left over?

113

(8)

Mainaxisalignment

113

(2)

Crossaxisalignment

115

(2)

Expanded widget

117

(4)

What if there's not enough space?

121

(3)

The ListView widget

121

(3)

Container widget and the box model

124

(6)

Alignment and positioning within a Container

126

(2)

So how do you determine the size of a Container?

128

(2)

Special layout widgets

130

(7)

Stack widget

130

(1)

GridView widget

131

(3)

The Table widget

134

(3)

Conclusion

137

(2)

Chapter 7 Navigation and Routing

139

(20)

Stack navigation

140

(4)

Navigating forward and back

141

(2)

Get result after a scene is closed

143

(1)

Drawer navigation

144

(6)

The Drawer widget

146

(2)

Filling the drawer

148

(2)

Tab Navigation

150

(3)

TabController

151

(1)

TabBarView

151

(1)

TabBar and Tabs

152

(1)

TabBar at the bottom

153

(1)

The Dialog widget

153

(4)

Showdialog() and AlertDialog

154

(1)

Responses with a Dialog

155

(2)

Navigation methods can be combined

157

(2)

Chapter 8 Styling Your Widgets

159

(28)

Thinking in Flutter Styles

160

(1)

A word about colors

161

(2)

Styling Text

163

(5)

TextStyle

163

(2)

Custom fonts

165

(3)

Container decorations

168

(8)

Border

170

(2)

BorderRadius

172

(1)

BoxShape

173

(3)

Stacking widgets

176

(4)

Positioned widget

178

(2)

Card widget

180

(1)

Themes

181

(5)

Applying theme properties

183

(3)

Conclusion

186

(1)

Chapter 9 Managing State

187

(18)

What is state?

187

(2)

What goes in a StatefulWidget?

189

(1)

The most important rule about state!

190

(1)

Passing state down

191

(1)

Lifting state back up

192

(1)

An example of state management

193

(5)

When should we use state?

198

(2)

Advanced state management

200

(3)

InheritedWidget

200

(1)

BLoC

200

(1)

ScopedModel

201

(1)

Hooks

201

(1)

Provider

202

(1)

Redux

202

(1)

Whoa! That's a lot of packages!

203

(1)

Conclusion

203

(2)

Part III Above and Beyond

205

(82)

Chapter 10 Your Flutter App Can Work with Files

207

(20)

Including libraries in your Flutter app

208

(3)

Finding a library

208

(2)

Adding it to pubspecyaml

210

(1)

Importing the library

210

(1)

Using the library

211

(1)

Futures, async, and await

211

(5)

Why would it wait?

212

(1)

How do we get the data from a Future?

213

(1)

Await

214

(1)

async

215

(1)

Including a file with your app

216

(2)

Writing a file

218

(2)

And reading it!

219

(1)

Using JSON

220

(3)

Writing your app's memory to JSON

221

(1)

Reading JSON into your app's memory

222

(1)

Shared preferences

223

(2)

To write preferences

224

(1)

To read preferences

224

(1)

Conclusion

225

(2)

Chapter 11 Making RESTful API Calls with HTTP

227

(28)

What is an API call?

228

(1)

The flavors of API requests

228

(2)

Making an HTTP GET or DELETE request

230

(1)

Making an HTTP PUT, POST, or PATCH request

231

(1)

HTTP responses to widgets

232

(6)

Brute force - The easy way

233

(1)

FutureBuilder-The clean way

234

(4)

Strongly typed classes

238

(2)

Create a business class

238

(1)

Write a fromJSON() method

239

(1)

Use fromJSON() to hydrate the object

240

(1)

One big example

240

(14)

Setting up

242

(1)

Create the Flutter app

243

(1)

Making a strongly typed business class

243

(1)

PeopleListdart

244

(3)

A GET request in Flutter

247

(1)

A DELETE request in Flutter

247

(1)

PeopleUpseitdart

248

(4)

A POST and PUT request in Flutter

252

(2)

Conclusion

254

(1)

Chapter 12 Using Firebase with Flutter

255

(32)

Introducing Firebase

256

(3)

Cloud Firestore

257

(1)

Cloud Functions

258

(1)

Authentication

259

(1)

Setting up Firebase itself

259

(19)

(1) Creating a Firebase project

260

(3)

(2) Creating the database

263

(4)

(3) Creating an iOS app

267

(6)

(4) Creating an Android app

273

(4)

(5) Adding FlutterFire plugins

277

(1)

Using Firestore

278

(5)

To get a collection

279

(2)

To query

281

(1)

To upsert

281

(1)

To delete

282

(1)

Where to go from here

283

(4)

Appendix A Dart Language Overview

287

(16)

What is Dart?

287

(1)

Expected features -- Dart Cheatsheet

288

(2)

Datatypes

288

(1)

Arrays/lists

289

(1)

Conditional expressions

289

(1)

Looping

290

(1)

Classes

290

(1)

Class constructors

291

(1)

Unexpected things about Dart

291

(8)

Type inference

292

(1)

final and const

292

(1)

Variables are initialized to null

293

(1)

String interpolation with $

294

(1)

Multiline strings

294

(1)

Spread operator

294

(1)

Map <foo, bar>

295

(1)

Functions are objects

295

(1)

Big arrow/Fat arrow

296

(1)

Named function parameters

296

(1)

Omitting "new" and "this."

297

(1)

Class constructor parameter shorthand

298

(1)

Private class members

299

(4)

Mixins

299

(1)

The cascade operator (..)

300

(1)

No overloading

301

(1)

Named constructors

301

(2)

Index

303

Rap Payne has focused on mobile development since he started Agile Gadgets, a mobile app development company in 2003. He is a consultant, trainer, and entrepreneur who has written apps, mentored developers, and taught software development classes for Fortune 500 companies like Boeing, Walmart, Coca-Cola, Wells Fargo, Honda,CVS, GE, Chase, HP, Lockheed, Exxon-Mobil, Lowe's, Nike, J.C. Penney, USAA, Walgreen's, and government agencies like the US Air Force, Navy, Army, NASA, Britain's GCHQ, Canada's postal service, and several provincial governments, to name a few.

As a professional mentor and trainer, Rap has developed a talent for communicating highly complex ideas in easy-to-understand ways. And as a real-world developer, he understands the need to teach these topics using practical and realistic examples and exercises.

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