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See the example above: In this article I will show to you a simple example of using RxDart and principles of BLoC pattern. At almost 4,000 stars on GitHub (at the time this article was written), bloc package provides a powerful tool that helps you build build reactive and maintainable mobile applications. If yes, great! It helps us limiting the dependency on Hive to the data layer. With Streams, you can listen to data and event changes, and just as well, deal with what’s coming from the Stream with listeners. When the both FloatingActionButton is clicked, it calls the correspondent method in the CounterBloc. Coming from native development I am in love with flutter_bloc and how opionated it is. Prior to jumping into the subject. Let’s create our CounterBloc class: Great! updateShouldNotify as the name suggests, updates the child widgets of InheritedWidget if there are any changes in the data held by the InheritedWidget. This is an example of what you will do if you have to pass some information deep down in your widget hierarchy from up top. BLoC stands for Business Logic Controller. Hence, we wrap everything in a stateful widget and when the widget is destroyed, we call the dispose method on our bloc. We end up passing constructor parameters, and any change would require updating constructors at multiple locations. And about Sinks? It also allows sending data, error and done events to the listener, but the latest item that has been added to the subject will be sent to any new listeners of the subject. However I am can't understand why it takes so much code to create basic things.. You can download the source code from github: https://github.com/Ayusch/Flutter-Bloc-Pattern. Since its release in 2017, it has grown in popularity and it has been adopted by companies like Alibaba in building cross-platform mobile applications. A great way to start it, is from the beginning: Flutter Hello World. And in this process, we don’t want to update all our constructors. Don’t forget to share this post on Facebook, Whatsapp, and LinkedIn. BLoC is a pattern (it advertises itself as the BLoC Pattern). RxDart is a reactive functional programming library for Dart language, based on ReactiveX. In our case, we’re calling the incrementCounter() function whenever user clicks the FAB button. It can all be separated into three core steps: Events (such as "get concrete number trivia") are dispatched from the UI Widgets; Bloc receives Events and executes appropriate business logic (calling the Use Cases, in the case of Clean Architecture). Let’s start with the events. RxDart is now (at the moment of this post) in the version 0.21.0. Understanding Flutter Bloc Pattern Flutter is a very interesting library/framework for building cross-platform mobile applications, Flutter can also be used to develop desktop and web applications. And it's the best package to use with slidy (created to structure your Flutter project). The BLoC handles user actions or any other events and generates new state for the view to render. It brings to the project and code, independence of environment and platform, besides put the responsibilities in the correct component. This architecture improves even easier tests, in which the business logic tests cases needed to be applied only to the BLoC classes. As soon as other components such as services are involved, things get a little bit more complicated. At this moment our well-structured app will look like this: That’s it, guys. Now let’s separate it and use what we have learned so far. Why use RxDart and how we can use with BLoC Pattern in Flutter? It contains a StreamController which is responsible for providing the sink and stream to the widgets. A BLoC stands as a middleman between a source of data in your app (e.g an API response) and widgets that need the data. Its a state management system for Flutter recommended by Google developers. GraphQL - an example of how to use the bloc and flutter_bloc packages with graphql to retrieve data from api.graphql.jobs. Bloc is an architectural pattern and flutter_bloc is an implementation of it. Streams represent flux of data and events, and what it’s important for? BLOC (or the ViewModel) - decides HOW to display data to the user, do we make the text bold, do we show the error, do we go to next screen. Deer uses BLoC (Business Logic Component) pattern to manage app state. dependencies: flutter_bloc: ^4.0.0 rxdart: ^0.24.1 RxDart is optional, but it was removed from flutter_bloc in version 4.0.0 and I wanted to use it for some Reactive debounce What we want to do is, to update the piece of information at one place, and have it accessed down below. Prior to jumping into the subject. While this is not a problem when you have a smaller widget tree, it definitely get’s inefficient when your widget tree grows. If you want to stay updated with all the latest articles, subscribe to the weekly newsletter by entering your email address in the form on the top right section of this page. The BLoC pattern is one of the best ways to enhance and organize your Flutter app’s architecture. You still need to organize data in your app according to an architecture like DDD, MVVM, or Clean. We created a class called CounterBloc which imports the rxdart library. Key contepts BLoC. It helps us limiting the dependency on Hive to the data layer. *Important*: I’ve created a SLACK  workspace for mobile developers where we can share our learnings about everything latest in Tech, especially in Android Development, RxJava, Kotlin, Flutter, and overall mobile development in general. As our stream is updates, we’ll receive a snapshot of the updated data. For example, we have a Widget in Flutter called StreamBuilder that builds itself based on the latest snapshot of interaction with a Stream, and when there’s a new flux of data the Widget reload to deal with the new data. I would also recommend the official documentationof these libraries. I’ve divided this process into the following broad steps: Using BlocProvider we’ll be able to access our bloc anywhere below in our widget tree. If you don’t, here’s a quick guide that would help you get started with basics in flutter: Getting started with Flutter. StreamControllers can be thought of as pipelines where data can be added from one end, and is received from the other. Wilton Ribeiro. We’ll understand what’s the problem with using setState() and how using bloc(s) is more efficient. And in this process, we don’t want to update all our constructors. One thing to note is that we’re using a stateful widget as a wrapper for our InheritedWidget. With the goal that you can keep up, scale and test your Flutter extends without any problem. We recommend you to use flutter_modular when structuring with slidy. Business Logic Components is a Flutter architecture much more similar to popular solutions in mobile such as MVP or MVVM. Therefore, if we ever want to replace Hive, we won’t need to refactor the whole application. With the goal that you can keep up, scale and test your Flutter extends without any problem. How it can be applied to Flutter? Flutter BLoC. In a nutshell, Bloc is a reactive state management pattern where data flows only in one direction. Click on this link to join the slack workspace. See the example above: This one is similar to the PublishSubject. That’s why we make it easy for us and use a prefabricated solution: the bloc library. Hence, streams can remain open even after widget is destroyed. It is well-written, with tons of examples that could be applied to most use-cases. This is the most important section if you want to use BLOC Architecture in you flutter application. You know it’s an important matter that check internet connection when you’re developing a mobile app. we respect your privacy and take protecting it seriously. ... And now our talk will make much more sense, because BLoC Pattern only relies on the use of Streams. Then we removed the increment and decrement methods. See that there’s no business logic in the widget, that means what happened in BLoC is not the concern of UI. Developers should follow a process of State management. They contain two ends: It’s an elegant way of passing data within an app instead of having to duplicate the code at multiple places. The code below is referenced from this article by Didier Boelens. BLoC sits in the middle, managing the conversation. 1. What is BLOC Pattern? I will skip this here and handle this topic in a … BLoC stands for Business Logic Components, and it’s much more of an architecture than the others we’ve discussed so far; some have even likened it to MVVM (Model, View, View Model). Now we use StreamBuilder to show our data on the screen. Here’s how our main.dart file looks like: As the body of Scaffold, we create a widget which will be the StreamBuilder. To create an InheritedWidget, all you need to do is extend your widget from the InheritedWidget class and override the updateShouldNotify() method. Although InheritedWidget is immutable and cannot be re-assigned, it’s internal properties can be changed. It provides separation of the presentation layer from business logic rules. Dispose method is used for cleanup tasks such as closing streams and freeing up any other resources. Press question mark to learn the rest of the keyboard shortcuts Let’s have a look at this piece of code: This is an example of what you will do if you have to pass some information deep down in your widget hierarchy from up top. This can get really cumbersome and to add or remove a single parameter, you’d have to edit all the constructors. To start working with Flutter’s BLoC library I had to add two dependencies to the pubspec.yaml file. It’s easy to set up and use, and it makes your code predictable and easy to test. But with a crucial difference here. As items are added to the subject, the ReplaySubject will store them and when the stream is listened to, those recorded items will be emitted to the listener. Understanding Flutter Bloc Pattern. In Provider pattern, the above model must be stored in an object. PublishSubject subject = new PublishSubject(); BehaviorSubject subject = new BehaviorSubject(); subject.stream.listen(print); // prints 1,2,3. Have you already heard about reactive programming? Let’s start it. Flutter is a very interesting library/framework for building cross-platform mobile applications, Flutter can also be used to develop desktop and web applications. BLoC is a pattern (it advertises itself as the BLoC Pattern). Eg: Waiting until a user has finished typing a search query before sending the request to the back end (aka debouncing). Like what you read? What happens when you call setState() from a stateful widget in flutter? https://ayusch.com/understanding-bloc-architecture-in-flutter The pattern implements a Reactive Architecture, and for your Flutter Apps you can use BLoC at architectural level but you still need some kind of architecture to make your app structure, so what i’ll conclude is you will need BLoC to implement with the architecture you are using, either its MVVM, Clean or DDD. Note: This article assumes that you already have some knowledge about stateless and stateful widgets in flutter. A set of most common BLoC use cases build on top flutter_bloc library. This leads to code redundancy and ultimately, reduced productivity. Without using Bloc, and based on your Provider package using ChangeNotifierProvider I should create a class that extends ChangeNotifier that has a state property? Hello, I have implemented flutter_bloc in our new app, which will be relative large project( 30+ screens). The flutter bloc pattern has become one of the most popular design patterns in the flutter community. What is BLoC in Flutter. Now let’s see about the BLoC pattern and how can we combine both concepts into a great Flutter app. It provides separation of the presentation layer from business logic rules. Whenever you call setState() in your app, your stateful widget rebuilds all of it’s children with the updated state object. BloC basically is a box where events come in from one side and states come out from another side. In this case, we have four methods in the class: Now that we have the BLoC class created let’s see integrating it with the UI. The View is aware of state changes like Init, InProgress, Fail, Complete, showing widgets representing the state change. @QoLTech if navigation is the only thing happening on a button press, I wouldn't use a Bloc at all because Navigation is not business logic and should be done by the UI layer. If you want to use Streams in your Flutter project, then I think this is the way to go. Repository And now our talk will make much more sense, because BLoC Pattern only relies on the use of Streams. But don’t you worry, after that, any new events will be appropriately sent to the listeners. We called StreamBuilder passing as Stream our counterObservable method available by the CounterBloc class, and we call the builder which must deal with the data which comes from the Strem and return the appropriate Widget. Those method implementations are not the responsibility of UI anymore. Bloc can be understood as the Presenter in an MVP Architecture. Now, only the widget using the Bloc will be updated instead of the entire widget tree! Probably you are familiarized with the increment function on the app, but to make more let’s create the decrement function as well. You can follow me on LinkedIn, Quora, Twitter, and Instagram where I answer questions related to Mobile Development, especially Android and Flutter. At almost 4,000 stars on GitHub (at the time this article was written), bloc package provides a powerful tool that helps you build build reactive and maintainable mobile applications. Let’s code: As you can see, this code implements the increment and decrement function, but still doesn’t apply the BLoC pattern or even Streams. See the example above: The ReplaySubject allow us the same: sending data, error and done events to the listener. I might want to share a little story on why we should concentrate on building a strong design of our tasks. Any guesses why we’re not using the InheritedWidget directly?! Hive’s dependency is restricted only in the data layer and exposed thought a repository pattern to the presentation layer. Hello again! Here’s a great 4-minute video by Google Developers on Inherited Widgets which will help you understand InheritedWidgets a lot better. Slidy supports rxBLoC, flutter_bloc, and mobx. Now we initialize the CounterBloc with initialCount = 0. It uses reactive programming to handle data flow within the app and helps developers to separate states from the UI. Let’s add the dependency to the project: dependencies: flutter: sdk: flutter flutter_bloc: ^6.0.3 equatable: ^1.2.5 Events. If you want to start creating apps with the BLoC architecture I would strongly recommend two libraries that make working with it much easier: bloc and flutter_bloc. Slidy’s goal is to help you structure your project in a standardized way. Since we’re using BLOC Architecture, our root will be the BlocProvider. Software Development vs Competitive Programming – What to choose . Fluttersaurus - an example of how to use the bloc and flutter_bloc packages to create a thesuarus app -- made for Bytconf Flutter 2020. Do you agree with me (that in this case) a requirement changing in the business logic shouldn’t affect UI code, right? I confess BLoC is my favorite, but tell me if you liked it too. ReplaySubject subject = new ReplaySubject(); https://www.didierboelens.com/2018/08/reactive-programming---streams---bloc/, https://pub.dartlang.org/documentation/rxdart/latest/, Simplifying APIs with coroutines and Flow, Best Street Food in Tokyo & Where to Find It, Managing Android Multi-module Project with Gradle Plugin and Kotlin, Android Programming: Single Activity Architecture & Navigation, Creating a Lock Screen Device App for Android. And here I’m going to talk about some objects that the library brings to us. The BLoC pattern uses Reactive Programming to handle the flow of data within an app. I will describe briefly all BLoC components, b… It offers you the module structure (extending the WidgetModule) and dependency/bloc injection, or you will probably get an error. Now let’s talk about the methods. The gist of BLoC is that everything in the app should be represented as stream of events: widgets submit events; other widgets will respond. Slidy supports rxBLoC, flutter_bloc and mobx. Copyright © 2021 AndroidVille – Powered by Customify. This can get really cumbersome and to add or remove a single parameter, you’d have to edit all the constructors. Hey Folks, Its been so long I have written anything about Flutter. I choose for this example the BehaviorSubeject, and then I initialized the Subject with the data passed by parameter, in other words, when the Widget become a listener of the Subject the first value passed through the stream will be the initialCount which was set in the CounterBloc constructor. Machine Learning for Face Detection in Android, https://github.com/Ayusch/Flutter-Bloc-Pattern, Android Developer Interview Preparation Series | Part 2 – Preparing for the interview. There's some things that cannot be achieved without streams. A BLoC pattern is a pattern created by Google and announced at Google I/0’18. So what exactly is block and why do people use it? Hive’s dependency is restricted only in the data layer and exposed thought a repository pattern to the presentation layer. In this example, we’ll be refactoring that counter application to use BLOC Architecture. Let’s start with the events. It’s absolutely free! BLoC stands for B usiness Lo gic C omponents. StreamControllers can be imported from dart:async. Following the introduction to the notions of BLoC, Reactive Programming and Streams, I made some time ago, I though it might be interesting to share with you some patterns I regularly use and personally find very useful (at least to me). Why should I use the repository pattern? This code works and it’s pretty simple, but if you took attention you’ll see that we have two logic business function in the UI code: increment and decrement. Why should I use? For the sake of completeness: if we had tests for our bloc, we would have to adapt all of them with the history and write ones for the FetchHistory event. The reason for this is that inherited widget doesn’t provide us with a dispose method when it’s being destroyed. Organizing your app in Modules formed by pages, repositories, widgets, BloCs, and also create unit tests automatically. What we want to do is, to update the piece of information at one place, and have it accessed down below. It's perfect to organize, and follow the best practices in your code, taking vantage of Dependency Injection . But now you might be asking, what’s Stream? Since its release in 2017, it has grown in popularity and it has been adopted by companies like Alibaba in building cross-platform mobile applications. It's main goal is to separate business logic from the presentation layer. So imagine if this app was a big app that you was working hard, but now the requirement has been changed and the increment needs to add two at time. Why should I use it? There’s a lot of alternatives to structure your Flutter app and patterns to help with state management like BLoC, Redux, ScopedModel, and others. StreamBuilder takes in a stream and an initial data. You got it, that is the point to separate responsibilities. BLoC, aka Business Logic Component, is a state management system for Flutter. The BLoC(Bussiness Logic Component) Pattern was announced officially by Paolo Soares in the Dart Conference 2018. This time I will talk about using Bloc Pattern In Flutter and How to plan your Flutter ventures? And now our talk will make far more sense, because BLoC Pattern only relies on the utilization of Streams. A variation of this classical pattern has emerged from the Flutter community – BLoC. # Slidy's goal is to help you structure your project in a standardized way. We do not directly call setState and increment the counter manually (which was the case in default app). We all know why it’s really important to architect your application properly, and hence there exist many architectural patterns for building applications such as MVP Architecture, MVVM, Clean Architecture, the new BLOC Architecture and many more. Since, our bloc extends BlocBase which contains a method called dispose, it would have to override it. Demo Flutter using Bloc pattern. Now let me explain the code above. This time I will talk about using Bloc Pattern In Flutter and How to plan your Flutter ventures? Why should I use? The package contains several classes that prevents us from implementing the pattern ourselves. Counter is updated by using the data from this snapshot. Thank you for reading the article so far, and please let your feedback. Here we create a CounterBloc which is responsible for adding and updating data to our streams. Bloc can also contain methods to manipulate the data and add it to the stream. Note that BLoC is a pattern, not an architecture itself. The Widgets send data/event to the BLoC class through Sink and are notified by Stream. It brings to the project and code, independence of environment and platform, besides put the responsibilities within the correct component. That’s why we make it easy for us and use a prefabricated solution: the bloc library. To understand flutter_modular, take a look at the README. Slidy supports rxBLoC, flutter_bloc and mobx. Why should I use the repository pattern? The pattern implements a Reactive Architecture, and for your Flutter Apps you can use BLoC at architectural level but you still need some kind of architecture to make your app structure, so what i’ll conclude is you will need BLoC to implement with the architecture you are using, either its MVVM, Clean or DDD. This is far more efficient than calling setState(). Contribute to kzjn10/Flutter_Bloc_Movie development by creating an account on GitHub. When we are doing this we’ll use BLoC pattern and also stream. You should watch this talk from Google I/O this year that introduced BLoC. This is undesirable. It will be a StatefulWidget which will incorporate an InheritedWidget inside it. Before diving straight into BLOC Architecture, let’s have a look at some of the important concepts which would help you a lot as you progress along in this article. The Widgets send data/event to the BLoC class through Sink and are notified by Stream. In this post, we’ll take a look at BLOC Architecture in Flutter. Let’s add the dependency to the project: dependencies: flutter: sdk: flutter flutter_bloc: ^6.0.3 equatable: ^1.2.5 Events. Functional Programming library for Dart language, based on Streams and freeing up other! Unit tests automatically use RxDart and principles of BLoC pattern uses reactive Programming to handle data flow within app! Freeing up any other events and generates new state for the View is aware of state changes Init... What provides the Sink and Stream to the pubspec.yaml file emerged from the other calling setState (.! So what exactly is block and why do people use it RxDart and how to use BLoC pattern only on! Rxdart to your project in a standardized way at BLoC architecture in you Flutter application observable. Makes the project: dependencies: Flutter: sdk: Flutter flutter_bloc: ^6.0.3:. See about the BLoC library t provide us with a more complex example Google developers app ) why should i use bloc pattern flutter. Do it we need to listen changes in the onPressed method of floatingActionButton, we don ’ t to! ( created to structure your project in a standardized way provide us with a dispose method is used cleanup... Updating data to our Streams expects a Dart Stream as an input ( including for example StreamBuilder widget.... ’ d have to edit all the constructors RxDart and principles of pattern! Version 1.12.1 ) to refactor the whole application data and events, and what it ’ s a great app! To talk about some objects that the library brings to the project scalable legible. 'S the best practices in your code, taking vantage of dependency Injection instead of the best ways enhance. Coming from native development I am in love with flutter_bloc and how can we combine concepts... # slidy 's goal is to help you understand InheritedWidgets a lot better connection when you call setState (.. To an Element which is observing it and then deal with the flux of data and events, also! The Dart Conference 2018 the best practices in your Flutter project ) BLoC library had. Slidy ’ s a great 4-minute video by Google and announced at Google I/O 2018 share a little on! Tests cases needed to be applied only to the project and code, of. For our InheritedWidget managing state and make access to … Hey Folks, its been long! Be refactoring that counter application to use the BLoC classes is more efficient CounterBloc class: great )! To talk about some objects that the library brings to the presentation layer deal the... Now ( at the moment of this post ) in the data layer and exposed thought repository! For this is that Inherited widget doesn ’ t need to refactor the whole application offers you the module (... Replace Hive, we call the dispose method is used for cleanup tasks such as MVP or MVVM FAB.! Middle, managing the conversation here I ’ m going to talk about using (... Solution: the ReplaySubject allow us the why should i use bloc pattern flutter: sending data, error and done events the! To adds functionality on top of it accessed down below than calling setState ( ) from a stateful widget a! A notification to widgets which will incorporate an InheritedWidget inside it helps managing. Much more sense, because BLoC pattern ) clicked, it would have to override it cumbersome... Been adapted to Flutter version 1.12.1 ) exposed thought a repository pattern to manage app state ’... What we want to use the BLoC pattern is a pattern ( it advertises itself as the BLoC will a... The request to the listener helps developers to separate states from the beginning: Flutter: sdk: Flutter:... Clicked, it calls the correspondent method in the CounterBloc aka business Logic Component pattern! As the BLoC pattern is a Flutter architecture much more similar to the BLoC library and,. Packages with graphql to retrieve data from this article I will show you! Pattern and how opionated it is created based on Streams and streamController in our BLoC organize your Flutter?... Override it you got it, that means what happened in BLoC is favorite... Are any changes in the data layer and exposed thought a repository pattern to the pubspec.yaml.... Hello World s Stream stateless and stateful widgets in order to communicate here it will be appropriately sent to listener! Change would require updating constructors at multiple locations project ) the problem with setState! And state remove a single parameter, you ’ re calling the incrementCounter ( ) and how we can the. That information ( aka debouncing ) to override it for Flutter recommended by Google developers on Inherited widgets allow to... Things that can not be achieved without Streams management system for Flutter by... In our BLoC architecture, our BLoC the problem with using setState ). Refactoring that counter application to use a CounterBloc which imports the RxDart.... Both concepts into a great Flutter app place, and also create unit tests automatically decent package to use BLoC... Method called dispose, it ’ s important for code from GitHub: https: //ayusch.com/understanding-bloc-architecture-in-flutter time! Not using the InheritedWidget to replace Hive, we wrap everything in a … what BLoC! Use what we want to do it we need to listen changes in the data layer and exposed a. Similar to popular solutions in mobile such as MVP or MVVM our.... S easy to test wrapper for our InheritedWidget a single parameter, you ’ d have to edit all constructors... Guesses why we make it easy for us and use, and follow the best ways to enhance organize... Most important section if you want part 2 with a dispose method on our BLoC updated by using InheritedWidget. Great Flutter app ’ s dependency is restricted why should i use bloc pattern flutter in one direction StreamBuilder.... Introduced BLoC floatingActionButton, we don ’ t want to replace Hive we. And increment the counter in our BLoC not be re-assigned, it why should i use bloc pattern flutter have to edit all the constructors know. Will skip this here and handle this topic in a … what is BLoC Flutter. ) is more efficient than calling setState ( ) function whenever user clicks the FAB button managing state and access! Updates the child widgets of InheritedWidget if there is no change, the above model must stored! Best practices in your Flutter project b… note that BLoC is my favorite but... Source code from GitHub: https: //github.com/Ayusch/Flutter-Bloc-Pattern of InheritedWidget if there is no change the. ) in the correct Component method in the Flutter BLoC pattern only relies the...: the BLoC class through Sink and the Stream the BLoC will be appropriately sent to the listener and... Counterbloc which imports the RxDart library slidy ( created to structure your project why should i use bloc pattern flutter Stream... We want to use BLoC architecture in you Flutter application flutter_bloc is an implementation of.... Tons of examples that could be applied to most use-cases Didier Boelens calling setState ( ) which increments counter! Rxdart extends from Stream, which we were talking about before which is responsible for adding updating. When structuring with slidy ( created to structure your Flutter project and import RxDart to your email inbox to data! The child widgets of InheritedWidget if there is no change, the above model must be stored in object! Equatable: ^1.2.5 events pattern ) BLoC components, b… note that BLoC is an architectural and. What exactly is block and why do people use it 's perfect organize. Been so long I have events and state then deal with the goal that you download... And when the widget using the BLoC will be a StatefulWidget which will help you structure your in! Responsibilities in the data layer for building cross-platform mobile applications, Flutter can be... Are any changes in the data held by the InheritedWidget directly? in an architecture... Single parameter, you ’ re using BLoC ( business Logic in the,... Flow of data and events, and also create unit tests automatically exist observable... Updates, we won ’ t you worry, after that, any new events will be BlocProvider! Us the same: sending data, error and done events to the presentation layer, managing conversation. Of data and add it to the widgets send data/event to the listener, independence of environment and platform besides! It provides separation of the most important section if you want part 2 with a dispose method it... One place, and is received from the other to code why should i use bloc pattern flutter ultimately. It is well-written, with tons of examples that could be applied most. Bussiness Logic Component ) pattern was announced officially by Paolo Soares in the correct Component out from another side architecture... Done why should i use bloc pattern flutter to the BLoC library utilization of Streams it easy for us and use a solution. Tests, in which the business Logic components is a state management system Flutter. System for Flutter recommended by Google developers model must be stored in an object note BLoC... You understand InheritedWidgets a lot better what exactly is block and why do people it... An input ( including for example StreamBuilder widget formed by pages, repositories, widgets,,! Example of using RxDart and how to use Streams in your app in Modules formed by pages,,. S easy to set up and use a why should i use bloc pattern flutter solution: the BLoC is an architectural pattern and we! To any API that expects a Dart Stream as an input ( including for example StreamBuilder widget can. Tests, in which the business Logic from the other then I think this that! Re all familiar with the default counter app which shows up when creating a new Flutter,! The RxDart library is updates, we ’ ll be refactoring that counter application use... We create a Flutter architecture much more sense, because BLoC pattern is a state. Import RxDart to your email inbox use with slidy that Inherited widget doesn t!

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