Skapa en klass för datat du vill ha.
class Data { final String col1; final String col2; Data({this.col1, this.col2}); factory Data.fromJson(Map<String, dynamic> json) { return Data( col1: json['col1'], col2: json['col2'] ); } }
Hämta och parsa.
import 'package:http/http.dart' as http; import 'dart:convert'; import 'data.dart'; Future<String> fetchData(String url) async { final response = await http.get(url); if (response.statusCode == 200) { return response.body; } else { throw Exception('HTTP error' + response.statusCode.toString()); } } Future<List<Data>> getJsondata(String url) async { final response = await fetchData(url); final parsed = json.decode(response).cast<Map<String, dynamic>>(); return parsed.map<Data>((json) => Data.fromJson(json)).toList(); }