GraphQL In Flutter :
This flutter tutorial post is GraphQL flutter.
- Query language.
- Send the query to the GraphQL Server. Server executes the query at runtime for fulfilling those queries with get the data.
- Structured Query Language.
- ValueNotifier notified to their listener whenever there is any value change.
Screenshot:

main.dart
import 'package:flutter/material.dart'; import 'package:graphql_flutter/graphql_flutter.dart'; void main() { runApp(MaterialApp(title: "GQL App", home: MyApp())); } class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { final HttpLink httpLink = HttpLink(uri: "https://countries.trevorblades.com/"); final ValueNotifier<GraphQLClient> client = ValueNotifier<GraphQLClient>( GraphQLClient( link: httpLink, cache: OptimisticCache( dataIdFromObject: typenameDataIdFromObject, ), ), ); return GraphQLProvider( child: HomePage(), client: client, ); } } class HomePage extends StatelessWidget { final String query = r""" query GetContinent($code : String!){ continent(code:$code){ name countries{ name } } } """; @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text("GraphlQL Client"), ), body: Query( options: QueryOptions( document: query, variables: <String, dynamic>{"code": "AS"}), builder: (QueryResult result, {VoidCallback refetch, FetchMore fetchMore}) { if (result.errors != null) { return Text(result.errors.toString()); } if (result.loading) { return Center(child: CircularProgressIndicator()); } return ListView.builder( itemBuilder: (BuildContext context, int index) { return ListTile( title: Text( result.data['continent']['countries'][index]['name']), ); }, itemCount: result.data['continent']['countries'].length, ); })); } }
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