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

Firing multiple Futures at the same time

When you need to run multiple Futures at the same time, there is a class that makes the process extremely easy: FutureGroup.

FutureGroup is available in the async package, which must be added to your pubspec.yaml, and imported into your dart file as shown in the following code block:

import 'package:async/async.dart';

Please note that dart:async and async/async.dart are different libraries: in many cases, you need both to run your asynchronous code.

FutureGroup is a collection of Futures that can be run in parallel. As all the tasks run in parallel, the time of execution is generally faster than calling each asynchronous method one after another.

When all the Futures of the collection have finished executing, a FutureGroup returns its values as a List, in the same order they were added into the group.

You can add Futures to a FutureGroup using the add() method, and when all the Futures have been added, you call the close() method to...