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...

When you want to use a BLoC as a state management pattern, a number of steps need to be performed and these are as follows:

  • Create a class that will serve as the BLoC.
  • In the class, declare the data that needs to be updated in the app. 
  • Set StreamControllers.
  • Create the getters for streams and sinks.
  • Add the logic of the BLoC.
  • Add a constructor in which you'll set the data.
  • Listen to changes.
  • Set a dispose method.
  • From the UI, create an instance of the BLoC.
  • Use StreamBuilder to build the widgets that will use the BLoC data.
  • Add events to the sink for any changes to the data (if required).

Most of the code in this recipe is similar to the previous one, Using StreamBuilder to create reactive user interfaces. The main difference is that we moved the logic of the app (the countdown in this case) to the BLoC class so that the user interface has almost no logic at all, which is the purpose of using a BLoC. Actually, the...