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Flutter Cookbook

Flutter Cookbook

By : Simone Alessandria, Kayfitz
4.2 (16)
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Flutter Cookbook

Flutter Cookbook

4.2 (16)
By: Simone Alessandria, 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)
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16
About Packt

Using Futures with StatefulWidgets

As mentioned previously, while Stateless widgets do not keep any state information, Stateful widgets can keep track of variables and properties, and in order to update the app, you use the setState() method. State is information that can change during the life cycle of a widget.

There are four core lifecycle methods that you can leverage in order to use Stateful widgets:

  • initState() is only called once when the State is built. You should place the initial setup and starting values for your objects here. Whenever possible, you should prefer this to the build() method.
  • build() gets called each time something changes. This will destroy the UI and rebuild it from scratch.
  • deactivate() and dispose() are called when a widget is removed from the tree: use cases of these methods include closing a database connection or saving data before changing route.

So let's see how to deal with Futures in the context of the lifecycle of a widget.

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