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Flutter State Management using ValueNotifier and ValueListenableBuilder - No Packages

Name: Flutter State Management using ValueNotifier and ValueListenableBuilder - No Packages
Uploaded: 2022-08-16
Channel: Marco Napoli

by Marco Napoli youtube.com August 16, 2022

8 min 6.2k views

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Dashboard using `ValueNotifier` and `ValueListenableBuilder`. State Management by using built-in Flutter classes. No Packages. What is covered In this project, you are going to take a look at: - How to use `ValueNotifier` and `ValueListenableBuilder` to pass data from a parent (ancestor) widget to child (descendant) widgets in the widget tree - State Management with build-in classes, no packages The Problem: - Dashboard app needs to chart espresso, coffee, and latte consumption - Drawing each bar, the chart needs to refresh independently for performance The Solution: - Use the `ValueNotifier` and `ValueListenableBuilder` to allow to selectively rebuild individual widgets for performance ValueNotifier and ValueListenableBuilder The `ValueNotifier` and `ValueListenableBuilder` allow to selectively rebuild individual widgets for performance 1. Create a class that extends `ValueNotifier` 2. Add fields to contain data defining them as `ValueNotifier` 3. Add methods to modify data and call the `notifyListeners()` method 4. Add the `ValueListenableBuilder` widget in the widget tree to rebuild widgets selectively if the data changed by individual field How it Works `ValueNotifier` and `ValueListenableBuilder` - The `ValueNotifier` and `ValueListenableBuilder` allow to selectively rebuild individual widgets for performance. Use fields to contain data defining them as `ValueNotifier`. Use methods to modify data and call the `notifyListeners()` method. Use the `ValueListenableBuilder` widget in the widget tree to rebuild widgets selectively if the data changed by individual field. GitHub: https://github.com/JediPixels/dashboard_valuenotifier Twitter: https://twitter.com/JediPixels Looking for Updates: https://JediPixels.dev Blog Article: https://jedipixels.dev/flutter-state-management-using-valuenotifier-valuelistenablebuilder Subscribe: https://www.youtube.com/JediPixels?sub_confirmation=1 #flutter #fluttertutorial #dart #flutterdev

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Marco Napoli @marconapoli 🇺🇸 United States

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Marco Napoli is the CEO of Pixolini an experienced mobile, web and desktop app developer. He has a proven record in developing visually elegant and simple-to-us...

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