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You're reading from  Flutter Cookbook, Second Edition - Second Edition

Product typeBook
Published inMay 2023
Reading LevelIntermediate
PublisherPackt
ISBN-139781803245430
Edition2nd Edition
Languages
Dart
Tools
Flutter
Concepts
Application Development
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Author (1)
Simone Alessandria
Simone Alessandria
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Simone Alessandria

Simone Alessandria wrote his first program when he was 12. It was a text-based fantasy game for the Commodore 64. Now, he is a trainer (MCT), author, speaker, passionate software architect, and always a proud coder. He is the founder and owner of Softwarehouseit. His mission is to help developers achieve more through training and mentoring. He has authored several books on Flutter, including Flutter Projects, published by Packt, and web courses on Pluralsight and Udemy.
Read more about Simone Alessandria

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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 saw in Chapter 7, The 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.

Getting ready

In order to follow along with this recipe, you will build an app from scratch. Call this new app streambuilder_app.

How to do it...

For this recipe, we will create a stream and use StreamBuilder to update the user interface. Perform the following steps:

  1. In your new app, in the lib...
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Flutter Cookbook, Second Edition - Second Edition
Published in: May 2023Publisher: PacktISBN-13: 9781803245430
© 2023 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Simone Alessandria

Simone Alessandria wrote his first program when he was 12. It was a text-based fantasy game for the Commodore 64. Now, he is a trainer (MCT), author, speaker, passionate software architect, and always a proud coder. He is the founder and owner of Softwarehouseit. His mission is to help developers achieve more through training and mentoring. He has authored several books on Flutter, including Flutter Projects, published by Packt, and web courses on Pluralsight and Udemy.
Read more about Simone Alessandria

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