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...

Packages enable the creation of modular code that can be shared easily. The simplest package should at least contain the following:

  • A pubspec.yaml file, with the package name, version, and other metadata
  • lib folder, containing the code of the package

A package can contain more than a single file in the lib folder, but must contain at least a single dart file with the name of the package; in our example, area.dart.

The area.dart file contains two methods, one to calculate the area of a rectangle, and the second to calculate the area of a triangle. It would make sense to have a single method that calculates both, but we need two methods for part 2 of this recipe, which follows.

In the pubspec.yaml file, we import the intl package:

intl: ^0.17.0

One of the great features of packages is that when you add a dependency there, and you depend on a package, you don't need to depend on that package from the main app. That means you do not have to import intl into...