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Flutter Cookbook

You're reading from   Flutter Cookbook Over 100 proven techniques and solutions for app development with Flutter 2.2 and Dart

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Product type Paperback
Published in Jun 2021
Publisher Packt
ISBN-13 9781838823382
Length 646 pages
Edition 1st Edition
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Authors (2):
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Simone Alessandria Simone Alessandria
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Simone Alessandria
Brian Kayfitz Brian Kayfitz
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Brian Kayfitz
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Table of Contents (17) Chapters Close

Preface 1. Getting Started with Flutter 2. Dart: A Language You Already Know FREE CHAPTER 3. Introduction to Widgets 4. Mastering Layout and Taming the Widget Tree 5. Adding Interactivity and Navigation to Your App 6. Basic State Management 7. The Future is Now: Introduction to Asynchronous Programming 8. Data Persistence and Communicating with the Internet 9. Advanced State Management with Streams 10. Using Flutter Packages 11. Adding Animations to Your App 12. Using Firebase 13. Machine Learning with Firebase ML Kit 14. Distributing Your Mobile App 15. Flutter Web and Desktop 16. About Packt

Using StreamBuilder to create reactive user interfaces

Streambuilder is a widget that listens to events emitted by a stream, and whenever an event is emitted, it rebuilds its descendants. Like the FutureBuilder widget, which we have seen in Chapter 7The Future Is Now: Introduction to Asynchronous Programming, StreamBuilder makes it extremely easy to build reactive user interfaces that update every time new data is available.

In this recipe, we will update the text on the screen with StreamBuilder. This is very efficient compared to the update that happens with a setState method and its build call, as only the widgets contained in StreamBuilder are actually redrawn. 

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