**Course Title:** Mastering Dart: From Fundamentals to Flutter Development **Section Title:** State Management Solutions **Topic:** Build a Flutter app utilizing a chosen state management solution to handle state across screens.(Lab topic) **Objective:** By the end of this topic, you will be able to: 1. Understand the importance of state management in Flutter applications. 2. Choose a suitable state management solution for your Flutter app. 3. Implement a state management solution to handle state across screens in a Flutter app. **Introduction:** State management is a crucial aspect of building Flutter applications. It involves managing the state of your app, which includes data, user interactions, and other app-specific information. In this topic, we will explore how to build a Flutter app using a chosen state management solution to handle state across screens. **Choosing a State Management Solution:** There are several state management solutions available for Flutter, including: 1. **Provider:** A popular state management solution that uses a provider to manage state. 2. **Riverpod:** A state management solution that uses a provider to manage state, but with a more concise and expressive API. 3. **BLoC (Business Logic Component):** A state management solution that separates business logic from the UI. For this topic, we will use **Provider** as our state management solution. **Implementing Provider for State Management:** To implement Provider for state management, follow these steps: 1. **Add the Provider package:** Add the Provider package to your pubspec.yaml file: ```yml dependencies: flutter: sdk: flutter provider: ^6.0.3 ``` 2. **Create a provider class:** Create a provider class that will manage the state of your app. For example: ```dart class AppState with ChangeNotifier { int _counter = 0; int get counter => _counter; void incrementCounter() { _counter++; notifyListeners(); } } ``` 3. **Wrap your app with a Provider:** Wrap your app with a Provider to make the provider class available to all widgets in your app: ```dart void main() { runApp( MultiProvider( providers: [ ChangeNotifierProvider(create: (_) => AppState()), ], child: MyApp(), ), ); } ``` 4. **Use the provider in your widgets:** Use the provider in your widgets to access the state of your app. For example: ```dart class MyWidget extends StatelessWidget { @override Widget build(BuildContext context) { final appState = Provider.of<AppState>(context); return Text('Counter: ${appState.counter}'); } } ``` **Conclusion:** In this topic, we have learned how to build a Flutter app using a chosen state management solution to handle state across screens. We have implemented Provider as our state management solution and used it to manage the state of our app. We have also learned how to use the provider in our widgets to access the state of our app. **Exercise:** Try implementing a different state management solution, such as Riverpod or BLoC, to manage the state of your app. **Additional Resources:** * [Provider documentation](https://pub.dev/packages/provider) * [Riverpod documentation](https://pub.dev/packages/riverpod) * [BLoC documentation](https://pub.dev/packages/bloc) **Leave a comment or ask for help:** If you have any questions or need help with implementing a state management solution, please leave a comment below.