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

There's more...

The State class has a life cycle. Unlike StatelessWidget, which is nothing more than a build method, StatefulWidgets have a few different life cycle methods that are called in a specific order.  In this recipe, you used initState and dispose, but the full list of life cycle methods, in order, is as follows:

  • initState
  • didChangeDependencies
  • didUpdateWidget
  • build (required)
  • reassemble
  • deactivate
  • dispose

The methods in bold are the most frequently used life cycle methods. While you could override all of them, you will mostly use the methods in bold.  Let's briefly discuss these methods and their purpose:

  • initState:

This method is used to initialize any non-final value in your state class. You can think of it as performing a job similar to a constructor. In our example, we used initState to kick off a Timer that fires once a second.  This method is called before the widget is added to the tree, so you do not have any...