Chapter Synopsis: Setting the stage for the book. Give the reader a feel for why they're here. What problems does Flutter solve? Why the boss would choose Flutter versus some other solution.

What is covered in this book

Brief chapter overview and roadmap

What is notcovered and where to find answers to your questions

The Dart language itself - There's an overview and cheatsheet in the Appendix
Deploying to a store
Device-specific programming

Who is this book for?

Who's a good fit and who is not
Where to go to satisfy the prerequisites

What is Flutter?

Problems it solves

Competitors to Flutter

What other options are available? What might you use if not Flutter? Advantages and disadvantages of Flutter vs the other options

React Native
Progressive Web Apps
WebView solutions (Ionic, etc.)
Truly native coding (Swift, Objective-C, Java, Kotlin)

Characteristics of Flutter - Big picture things to keep in mind to successfully code in Flutter

This ain't the web!
Imperative UI
You're writing using Dart
Everything is a widget (Define widgets and explain the big win of widgets)
Widgets composition

2. How do I develop in Flutter?

Chapter synopsis: Flutter has a unique set of tools but it isn't always straightforward what each tool does and how to use it. This chapter guides the reader through the process of write-debug-test-run.
Installing Flutter tooling - A very brief and high-level coverage of where to get the tools. It should be brief because the details are likely to change regularly.
Overview of each tool

The emulators

iOS simulator through XCode
Android emulator through Android Studio

The IDE - Visual Studio Code

Alternatives: Android Studio, Atom, jBoss, etc.

The Flutter CLI

How to check and repair your toolchain through Flutter doctor
How to scaffold a new app
How to run in an emulator
When errors occur
How to debug

print() statement
Flutter inspector or DartCode VS Code plugin

Watch mode

Section: Foundational Flutter

3. Everything is widgets

Chapter Synopsis: Widgets are super-important to Flutter since they're the building blocks of every Flutter app. We show why and provide the motivation and basic tools to create widgets.
Composition

Define composition
Provide real-world examples
Why it is such a win

Comparison with Web Components, React, Angular, and Vue
The categories of Flutter UI widgets

Value Widgets

Example: Text widget

Style Widgets

Example: Center widget

Composition Widgets
Example: Container widget

Navigation Widgets

Example: AppBar widget

Bringing the chapter together: Composing them in a custom widget

Stateful vs. Stateless widgets

What is state?
How to create a custom stateless widget (Note: creating a stateful widget is complex so we're saving it for the State chapter).

4. Value Widgets

Chapter Synopsis: Deep dive into widgets that hold a value, especially user-input fields
What's the pubspec.yaml file?
Text widget
ListView widget

ListView for a small list
ListTitle
Using a ListView.builder() for memory efficiency

Image widget
Input widgets

TextField widget
Form widget
TextFormField widget (Yes, it's different)
CheckBox widget
RadioButton widget
DropDownButton and DropDownMenuItem widgets
Validating input data

5. Responding to Gestures

Chapter Synopsis: How to make your program do things in response to user actions like taps, swiping, pinching, and the like

RaisedButton widget
FlatButton widget
IconButton widget
FloatingActionButton widget
CupertinoButton

Custom gestures on custom widgets
Step 1 - Decide on your gestures
Step 3 - Add a GestureDetector widget
Step 4 - Associate your gesture with a method

Example - LongPress
Example - Pinching
Example - Swiping

Competing gestures

The GestureArena and conflict resolution

6. Laying out your widgets

Chapter Synopsis: How to lay out a view, controlling how widgets are placed side-by-side and/or above-and-below, defining the amount of space between widgets, and aligning them vertically and horizontally
How sizing widgets works

Box constraints
Box size vs widget size

What's the difference and when each apply

Width, height, minwidth, maxwidth, minheight, maxheight

Margin
Border
Padding

EdgeInsets.all(), EdgeInsets.only()

Position
Alignment
How to apply these things to widgets that don't support them

Laying out the whole scene

MaterialApp and Scaffold widgets
AppBar widget
SnackBar widget

SnackBarAction

Widgets that hold multiple children

Row and Column widgets

Aligning inside them

ScrollView widgets

To make view scrollable

Expanded widget

For when the contents are larger than the screen

GridView widget

For children across and then down. Like Pinterest

Stack widget

For allowing widgets to overlay each other in the z-direction

Widgets that hold a single child

Container widget
Expanded widget
SafeArea widget
Card widget

7. Navigation with widgets

Chapter Synopsis: Making the app "hide" one widget and "show" another in response to user actions. This makes them feel like they're moving from one view to another.
Dialog widget

AlertDialog widget and showDialog method

Why navigation?
Why do we need routes?
Named routes
The Navigator widget

Pushing and popping routes

Setting up navigation

MaterialPageRoute

Types of navigation

Tab navigation
Stack navigation
Dialogs and modals

Passing context between routes
Drawer widget
Tab widget
Stack widget
Hamburger icon and dropdown navigation
BottomSheet widget
BottomNavigation widget

8. Styling your widgets

Chapter Synopsis: How to control each widget's position, color, spacing, and other presentational characteristics. We handled light styling as we introduced each widget above but this is where we answer all the questions needed to get a real-world app looking good.
This is not CSS

Styles don't get inherited

What is Material Design?
Some widgets take a style parameter.
Text

TextStyle

textScaleFactor, fontSize
textOverflow, maxlines
Underline, overline, strikethrough

Using custom fonts

Google Fonts
pubspec.yaml
Selecting, downloading, applying

BoxDecoration

BorderRadius Widget
BoxShadow Widget
BoxShape enum (.circle, etc)

Themes

Applying a theme to the entire app
Applying styles from the current theme

9. Maintaining State

Chapter Synopsis: How to get data from one widget to another and how to change that data.
Reminder of stateful vs. stateless widgets
When to choose each
How to create a custom stateful widget

Extend StatefulWidget with createState()
Extend State with build()
Call setState() to trigger a re-render

Passing data from host to inner
Passing data from inner to host
Sharing data between siblings and cousins

Section: Above and Beyond

10. Talking to other computers

Chapter Synopsis: How to read from and write to a server. This is where we show how to make Ajax calls.
Why would we want to talk to a server?
RESTful APIs are amazing!

Definition of REST
Structure of REST

How to read a single record
How to read a list of records
How to add a new record
How to delete an existing record
How to update an existing record

11. Including external libraries

Chapter Synopsis: How to find, install, and use 3^rd-party components and libraries in your Flutter app
Locating libraries
Installing libraries
Integrating in your Flutter app

12. Using the camera and other device resources

Chapter Synopsis: How Flutter allows us to programmatically use the phone's native hardware
Taking pictures and video with the camera
Making phone calls
Sending SMS/text messages
Using the GPS and geolocation to know where you are
Reading sensors -- thermometer, brightness, proximity, air pressure, accelerometer and gyroscope
Battery Power monitor

Section: Appendices

Dart language intro

Chapter Synopsis: A brief introduction to the Dart language. More of a cheat sheet
Flutter procedural code is written in Dart
Why did Google choose Dart?
Advantages and Disadvantages of Dart

Sort of a compromise between JavaScript and Java
Statically-typed like Java
Truly object-oriented like Java

Dart vs. JavaScript
Dart vs. Java/C#
Features of Dart we need for Flutter

Firebase

Chapter Synopsis: Firebase is the Google service we'll be using to host our RESTful data. This appendix is a high-level explanation, just enough for the reader to understand the server-side tools. Demystifying the backend enough so the reader isn't distracted. Answers the question, "What parts are done in Flutter and what parts are done by something else?"
Firebase functions
Firebase Firestore

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.

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.

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