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...

In this recipe, getPosition is the Future we will pass to the FutureBuilderIn this case, initState is not required at all: FutureBuilder takes care of updating the user interface whenever there's a change in the data and state information.

Note that there are two properties we are setting for FutureBuilder: the future, which in this example is our getPosition() method, and the builder.

The builder takes the current context and an AsyncSnapshot, containing all the Future data and state information: the builder must return a widget.

The connectionState property of the AsyncSnapshot object makes you check the state of the Future. In particular, you have the following:

  • waiting means the Future was called but has not yet completed its execution.
  • done means that the execution completed.