Results for “Rebuild UI when state changes”

UI is a function of state, so instead of mutating widgets you change the data and let the affected widgets rebuild. Keep state

only on its constructor arguments and BuildContext. StatefulWidget creates a State object that survives rebuilds and holds mutable data. State lifecycle: initState → didChangeDependencies → build → (didUpdateWidget

long drops the frame. setState marks that State's element dirty and everything below it rebuilds unless a child is the identical widget instance. Keep setState

Use package:http to send a request, await the Future , check the

Flutter has three test levels: unit tests (package:test) for plain Dart

Instructions on how to manage state with ChangeNotifiers. Learn to use ListenableBuilder to automatically rebuild UI and handle all possible states with switch expressions

UI itself (like widget.setText )—you change the state, and the UI rebuilds from scratch. Read more about the declarative approach to UI

Learn about common architecture concepts in application design, and how they apply

How to ensure that your Flutter app is performant. Generally, Flutter applications

A simple form of state management. Now that you know about

When updating the data, you can also ask Flutter to rebuild the UI with those changes. In this case, you have one piece of data

. To use ChangeNotifier , extend it in your state management class to gain access to the notifyListeners() method, which triggers UI rebuilds when called. Create

Dive deeper into how Flutter works through a six-part video series

Learn about StatefulWidgets and rebuilding Flutter UI. Learn when widgets need to be stateful and how to trigger UI updates with setState. Introduction

How to tell the difference between ephemeral and app state. This

A high-level overview of the architecture of Flutter, including the core

How to write a staggered animation in Flutter. A staggered animation consists

A tutorial showing how to build explicit animations in Flutter. How to

How to use the focus system in your Flutter app. This article

The recommended way to architect a Flutter app. The following pages demonstrate

How to perform animations in Flutter. Well-designed animations make a UI