Gain insights into mastering Flutter state management with Riverpod and Provider libraries. Learn about reducing widget rebuilds and best practices to enhance your cross-platform app development skills.

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Flutter SDK is an excellent tool for developing cross-platform applications from a single codebase. So, it's no surprise that many professionals and learners have decided to gain mastery over Flutter concepts.

One such concept is state management, and many, despite having intermediate-to-advanced proficiency in Flutter, still struggle with this concept. This course will help you learn and master the best practices for state management in Flutter.

You will learn to use the two best Flutter libraries, Riverpod and Provider, for state management. You will even learn about reducing widget rebuilds by managing their state.

Master State Management in Flutter


# What is the `StateNotifier`?

`StateNotifierProvider` is just another `Provider` variant in `Riverpod` to manage state in Flutter. However, there is a remarkable difference with `ChangeNotifierProvider`.

# What is the `StateNotifierProvider`?
The `StateNotifierProvider` does not use `notifyListener()` anymore as it does not extend the data model with `ChangeNotifier`. However, it depends on `StateNotifier`, a Flutter independent mutable state change mechanism that has similarities with `ChangeNotifier` or `ValueNotifier`.

We'll come to that point and discuss the core concepts in detail in the latter part of this lesson.

# An old example

Our example Flutter application from the `ChangeNotifierProvider` [lesson](https://www.educative.io/courses/master-state-management-flutter/the-changenotifierprovider-widget) shows how `ChangeNotifierProvider` extends `ChangeNotifier` from Flutter and notifies listeners. In such cases, the subscribers listen to the notification and update the state accordingly.

Now, the `StateNotifierProvider` extends the data model with `StateNotifier`, which operates with a specific type. This type could be a straightforward primitive data type, such as integer, or pretty complex like any user-defined abstract class with many children.

However, in the first part of this lesson, we will keep things simple to understand how `StateNotifierProvider` works with `StateNotifier`.

# `StateNotifierProvider` data model 

Since the data model of `StateNotifierProvider` extends `StateNotifier`, it looks different from other `Provider` variants of the Riverpod state management package in Flutter. Although the functionality is the same, it works on a different principle.

Let's take a look at the data model first.

Learn what the StateNotifier and StateNotifierProvider are and how you can reduce widget rebuilds with them.

Introduction

Stateless vs. Stateful Widgets

Flutter Callbacks and Maps

Managing States and Widgets in Flutter

A Brief Look at the Flutter Provider Library

A Deeper Dive Into the Provider Library

Riverpod Library for State Management

Flutter Challenges

Conclusion

Appendix

Introduction to StateNotifierProvider

What is the `StateNotifier`?

What is the `StateNotifierProvider`?

An old example