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
Dart: A Language You Already Know

At its heart, Dart is a conservative programming language. It was not designed to champion bold new ideas, but rather to create a predictable and stable programming environment. The language was created at Google in 2011, with the goal of unseating JavaScript as the language of the web.

JavaScript is a very flexible language, but its lack of a type system and misleadingly simple grammar can make projects very difficult to manage as they grow. Dart aimed to fix this by finding a halfway point between the dynamic nature of JavaScript and the class-based designs of Java and other object-oriented languages. The language uses a syntax that will be immediately familiar to any developer who already knows a C-style language.

This chapter also assumes that Dart is not your first programming language. Consequently, we will be skipping the parts of the Dart language where the syntax is the same as any other C-style language. You will not find anything in this chapter about loops, if statements, and switch statements; they aren't any different here from how they are treated in other languages you already know. Instead, we will focus on the aspects of the Dart language that make it unique.

In this chapter, we will cover the following recipes, all of which will function as a primer on Dart:

  • Declaring variables  var versus final versus const
  • Strings and string interpolation
  • How to write functions
  • How to use functions as variables with closures
  • Creating classes and using the class constructor shorthand
  • Defining abstract classes
  • Implementing generics
  • How to group and manipulate data with collections
  • Writing less code with higher-order functions
  • Using the cascade operator to implement the builder pattern
  • Understanding Dart Null Safety
If you are already aware of how to develop in Dart, feel free to skip this chapter. We will be focusing exclusively on the language here and will then cover Flutter in detail in the next chapter.