![flutter blocs flutter blocs](https://i.ytimg.com/vi/h3TEEGceYsU/maxresdefault.jpg)
So you need to wrap the AlbumsScreen with the BlocProvider.
#FLUTTER BLOCS UPDATE#
The BlocBuilder receives the events to update the UI.
Here we are showing a list of albums when the call succeeds. Even if the bloc framework uses a line in the build widget: Provider.ofRest is simple, Update the UI based on the state. What are Cubits Cubits are nothing but a minimal version of Bloc itself. Initially it will return AlbumLoading State, then if the call is success, it will return AlbumsLoaded state etc. We will be making use of Flutter Bloc pattern (cubits) to create a simple counter app in flutter. The above call will trigger the ‘fetchAlbums’ event which will trigger the BLoc and returns the state. Here you can see that the BlocBuilder has a ‘builder’ property which has a state variable that gets us access to the returned state.Ĭontext.bloc().add(AlbumEvents.fetchAlbums) This widget will listen to the changes from the bloc file and update the UI.
![flutter blocs flutter blocs](https://miro.medium.com/max/1200/1*jT-pqvAV9uIkVtSPiPcFwA.png)
The AlbumsScreen we created has a widget called BlocBuilder which has types ‘AlbumsBloc and AlbumsState’. Import 'package:flutter_demos/model/albums_list.dart' Ĭlass AlbumServices implements AlbumsRepo \nTap to Retry.' Let’s create the services file and get the data.Ĭreate a new file named “ services.dart” and copy the below. Once we have the model classes, we are ready for the service consumption. Json.encode(om(data.map((x) => x.toJson()))) įactory omJson(Map json) => Album( Let’s create the model classes for the service response first.īelow is the response class for the service response Http package to get data from the web service. Extensions IntelliJ - extends IntelliJ/Android Studio with support for the Bloc library and provides tools for effectively creating Blocs for both Flutter and AngularDart apps. Open your pubspec.yaml file add the dependenciesĪdd all the dependencies needed for this example It covers the bloc package (version 6.0.3) in all flavors: bloc, flutterbloc hydratedbloc, replaybloc, bloctest and cubit. We will first write a service class that will consume the web service. So what basically Bloc does is, it will take an event and a state and return a new state which we will use to update the UI.You don’t need to maintain any local state in your application if you have BLoc. So in simple terms, we will write all our business logic inside the bloc file. The service we are going to use isīLoc helps to separate you presentation and business logic. For this example, we will try to consume a web service.