Flutterexperts

This blog will explore the Managing State in Flutter with the State Rebuilder Library: A Comprehensive Guide. We perceive how to execute a demo program. We will learn how to implement it in your flutter applications.

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Table of Contents:

What is the State rebuilder in Flutter

Why Use State Rebuilder

Integrating State Rebuilder into your Flutter application

Conclusion

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What is the State rebuilder in Flutter:

State management is one of the key concepts in developing any mobile application. It involves managing the data that affects your application’s UI and the UI itself. In Flutter, there are many ways to handle state management, including using the Scoped Model, Provider, BLoC, and many more. However, there is one lesser-known state management solution in Flutter, called the “State Rebuilder.”

State Rebuilder is a state management library in Flutter that is easy to learn and use, and it provides a simple, yet efficient, way to manage your application’s state. It was created to solve some of the problems associated with traditional state management techniques, such as complexity and code duplication. The library is designed to provide a simple and efficient way to manage the state of your application, making it an excellent choice for small to medium-sized applications.

Why Use State Rebuilder:

One of the key features of State Rebuilder is that it is built on top of streams, making it possible to use the reactive programming paradigm to manage your state. This means that whenever your state changes, the UI of your application will automatically update to reflect the changes, making it easier to develop and maintain your application. In addition, State Rebuilder provides a simple and efficient way to isolate your state management logic from your UI, making it easier to test and maintain your code.

Another advantage of using State Rebuilder is that it provides an easy way to manage a global state, which is a state that affects multiple parts of your application. With State Rebuilder, you can easily manage a global state by creating a single instance of the state management object, and then using it throughout your application. This makes it easy to manage the state of your application, and it eliminates the need for complex state management code.

Integrate State Rebuilder into your Flutter application:

Let’s imagine we want to build a simple counter application in Flutter. The application has a button that increments the counter value when it’s pressed. Here’s how we can use State Rebuilder to manage the state of our counter application:

First, we need to install the states_rebuilder library by adding the following line to our pubspec. yaml file.

dependencies:
states_rebuilder: ^6.2.0

Next, we need to create a new instance of the StateRebuilder object and pass in a function that returns the initial state of our application. In this case, the initial state is simply an integer with a value of 0.

final _rebuilder = StateRebuilder<int>(
initialValue: 0,
builder: (state) => Text(state.toString()),
);

Next, we can create a simple UI that displays the counter value and a button that increments the counter value when it’s pressed. To access the state from within our UI, we use the InheritedRebuilder widget, and pass in the StateRebuilder object as a parameter.

class MyHomePage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: InheritedRebuilder(
rebuilder: _rebuilder,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'You have pushed the button this many times:',
),
Text(
_rebuilder.state.toString(),
style: Theme.of(context).textTheme.headline4,
),
],
),
),
),
floatingActionButton: FloatingActionButton(
onPressed: () => _rebuilder.setState((state) => state + 1),
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
}

Now, whenever the button is pressed, the setState method is called on the StateRebuilder object. The setState the method takes a function as a parameter, which takes the current state as an argument and returns the new state. In this case, we simply increment the current state by 1.

And that’s it! We now have a working counter application that uses State Rebuilder to manage its state. By using State Rebuilder, we have separated our state management logic from our UI, making it easier to test and maintain our code.

Here’s the complete code for our counter application:

import 'package:flutter/material.dart';
import 'package:state_rebuilder/state_rebuilder.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter State Rebuilder Example',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(),
);
}
}

class MyHomePage extends StatelessWidget {
final _rebuilder = StateRebuilder<int>(
initialValue: 0,
builder: (state) => Text(state.toString()),
);

@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: InheritedRebuilder(
rebuilder: _rebuilder,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'You have pushed the button this many times:',
),
Text(
_rebuilder.state.toString(),
style: Theme.of(context).textTheme.headline4,
),
],
),
),
),
floatingActionButton: FloatingActionButton(
onPressed: () => _rebuilder.setState((state) => state + 1),
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
}

With this code, we now have a simple and clean implementation of state management in Flutter using the State Rebuilder library. By using State Rebuilder, we can separate our state management logic from our UI, making it easier to test and maintain our code.

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Conclusion:

In conclusion, the State Rebuilder library is a powerful tool for state management in Flutter. It provides a clean and simple approach to managing state in your Flutter applications, allowing you to separate your state management logic from your UI.

With State Rebuilder, you can easily manage complex state interactions and make use of powerful features like state observation and state management via streams. Whether you are a seasoned Flutter developer or just starting the State Rebuilder library is worth considering for your next project.

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