Provider Package Basics
Learn to use the Provider package, a popular Flutter solution, for simple and scalable state management across your application.
What is Provider?
The Provider package is a popular and simple solution for state management in Flutter. It's built on top of Flutter's own InheritedWidget, making it efficient and easy to understand.
It helps you share data and state across your widget tree without complex callbacks or prop drilling.
The Data Holder: ChangeNotifier
At the heart of Provider is the ChangeNotifier class. You extend this class for any object that holds state you want to share.
When your state changes, you call notifyListeners() to tell all listening widgets to rebuild.
import 'package:flutter/material.dart';
// 1. Extend ChangeNotifier
class MyCounter extends ChangeNotifier {
int _count = 0; // Private state variable
// Getter to access the count
int get count => _count;
// Method to modify state and notify listeners
void increment() {
_count++;
notifyListeners(); // Important! Triggers UI updates
}
}All lessons in this course
- setState & InheritedWidget
- Provider Package Basics
- Riverpod for State
- BLoC Pattern with Streams