Marco L. Napoli

Beginning Flutter (eBook, PDF)

A Hands On Guide to App Development

• Format: PDF

Produktbeschreibung

Build your first app in Flutter--no experience necessary! Beginning Flutter: A Hands-On Guide to App Development is the essential resource for both experienced and novice developers interested in getting started with Flutter--the powerful new mobile software development kit. With Flutter, you can quickly and easily develop beautiful, powerful apps for both Android and iOS, without the need to learn multiple programming languages or juggle more than one code base. This book walks you through the process step by step. In Flutter, you'll be working with Dart, the programming language of choice for top app developers. Even if you're just starting out in your development career, you can learn Dart quickly, eliminating the barrier to entry for building apps. This is a more efficient way to develop and maintain cross-platform mobile apps, and this book makes the process even easier with a teach-by-example approach. * Focus on providing quality content by eliminating the need to switch between multiple coding languages * Learn the ins and outs of Flutter, including all the frameworks, widgets, and tools available to developers * Accelerate your app development pace, keeping all the code for your cross-platform app in a single code base * Leapfrog barriers to entry to the mobile software market, creating your first app with no experience necessary The Flutter community is growing rapidly and transforming the way Android and iOS apps get made. Beginning Flutter allows you to get on board with the latest app development technology, giving your mobile development career a big head start.

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Produktdetails

• Verlag: John Wiley & Sons
• Seitenzahl: 528
• Erscheinungstermin: 11. September 2019
• Englisch
• ISBN-13: 9781119550877
• Artikelnr.: 57786003

Autorenporträt

About the author Marco L. Napoli is the CEO of Pixolini Inc. and an experienced mobile, web and desktop app developer. He has a strong proven record in developing visually elegant and simple to use systems. His work and published apps can be seen at pixolini.com.

Inhaltsangabe

Introduction xxi

Part I: The Foundations of Flutter Programming

Chapter 1: Introducing Flutter and Getting Started 3

Introducing Flutter 4

Defining Widgets and Elements 5

Understanding Widget Lifecycle Events 5

The StatelessWidget Lifecycle 6

The StatefulWidget Lifecycle 6

Understanding the Widget Tree and the Element Tree 8

Stateless Widget and Element Trees 9

Stateful Widget and Element Trees 10

Installing the Flutter SDK 13

Installing on macOS 13

System Requirements 13

Get the Flutter SDK 13

Check for Dependencies 14

iOS Setup: Install Xcode 14

Android Setup: Install Android Studio 14

Set Up the Android Emulator 15

Installing on Windows 15

System Requirements 15

Get the Flutter SDK 16

Check for Dependencies 16

Install Android Studio 16

Set Up the Android Emulator 17

Installing on Linux 17

System Requirements 17

Get the Flutter SDK 18

Check for Dependencies 19

Install Android Studio 19

Set Up the Android Emulator 19

Configuring the Android Studio Editor 20

Summary 20

Chapter 2: Creating a Hello World App 25

Setting Up the Project 25

Using Hot Reload 30

Using Themes to Style Your App 33

Using a Global App Theme 33

Using a Theme for Part of an App 35

Understanding Stateless and Stateful Widgets 37

Using External Packages 38

Searching for Packages 39

Using Packages 40

Summary 41

Chapter 3: Learning Dart Basics 43

Why Use Dart? 43

Commenting Code 44

Running the main() Entry Point 45

Referencing Variables 45

Declaring Variables 46

Numbers 47

Strings 47

Booleans 47

Lists 47

Maps 48

Runes 48

Using Operators 49

Using Flow Statements 51

if and else 51

ternary operator 52

for Loops 52

while and do-while 53

while and break 54

continue 54

switch and case 55

Using Functions 55

Import Packages 57

Using Classes 57

Class Inheritance 60

Class Mixins 60

Implementing Asynchronous Programming 61

Summary 62

Chapter 4: Creating a Starter Project Template 65

Creating and Organizing Folders and Files 65

Structuring Widgets 69

Summary 74

Chapter 5: Understanding the Widget Tree 77

Introduction to Widgets 77

Building the Full Widget Tree 79

Building a Shallow Widget Tree 85

Refactoring with a Constant 86

Refactoring with a Method 86

Refactoring with a Widget Class 91

Summary 99

Part II: Intermediate Flutter: Fleshing Out an App

Chapter 6: Using Common Widgets 103

Using Basic Widgets 103

SafeArea 107

Container 108

Text 112

RichText 112

Column 114

Row 115

Column and Row Nesting 115

Buttons 119

FloatingActionButton 119

FlatButton 121

RaisedButton 121

IconButton 122

PopupMenuButton 123

ButtonBar 126

Using Images and Icons 130

AssetBundle 130

Image 131

Icon 132

Using Decorators 135

Using the Form Widget