Book Image

Flutter Cookbook

By : Simone Alessandria, Brian Kayfitz
4 (1)
Book Image

Flutter Cookbook

4 (1)
By: Simone Alessandria, Brian Kayfitz

Overview of this book

“Anyone interested in developing Flutter applications for Android or iOS should have a copy of this book on their desk.” – Amazon 5* Review Lauded as the ‘Flutter bible’ for new and experienced mobile app developers, this recipe-based guide will teach you the best practices for robust app development, as well as how to solve cross-platform development issues. From setting up and customizing your development environment to error handling and debugging, The Flutter Cookbook covers the how-tos as well as the principles behind them. As you progress, the recipes in this book will get you up to speed with the main tasks involved in app development, such as user interface and user experience (UI/UX) design, API design, and creating animations. Later chapters will focus on routing, retrieving data from web services, and persisting data locally. A dedicated section also covers Firebase and its machine learning capabilities. The last chapter is specifically designed to help you create apps for the web and desktop (Windows, Mac, and Linux). Throughout the book, you’ll also find recipes that cover the most important features needed to build a cross-platform application, along with insights into running a single codebase on different platforms. By the end of this Flutter book, you’ll be writing and delivering fully functional apps with confidence.
Table of Contents (17 chapters)
About Packt

How it works...

Just like functions, Dart implements the expected behavior for classical object-oriented programming.

In this recipe, you used inheritance, which is a building block of OOP. Consider the following class declaration:

class OfficialName extends Name {

This means that OfficialName inherits all the properties and methods that are available in the Name class, and may add more or override existing ones.

One of the more interesting syntactical features in Dart is the constructor shorthand. This allows you to automatically assign members in constructors by simply adding the this keyword, which is demonstrated in the Name class, as shown in the following code block:

const Name(this.first, this.last);

The Dart plugin for Android Studio and Visual Studio Code also has a handy shortcut for generating constructors, so you can make this process go even faster. Try deleting the constructors from the Name class. You should see red underlines underneath the first and last properties. Move your cursor to one of those properties (it doesn't matter which one) and press Option + Enter:

You should see a popup appear that generates constructions for final fields. If you hit Enter, your constructor will appear without you having to type anything. It's convenient.