Flutter http.get - flutter

Question

My problem is, that when I try to map the brands I need to declare brandsData as a Map<String, dynamic> but in that case jsonDecode(s) is red because it could be null

Answer 1

You can change your Model to this .
// To parse this JSON data, do
//
// final album = albumFromJson(jsonString);
import 'dart:convert';
List<Album> albumFromJson(String str) => List<Album>.from(json.decode(str).map((x) => Album.fromJson(x)));
String albumToJson(List<Album> data) => json.encode(List<dynamic>.from(data.map((x) => x.toJson())));
class Album {
Album({
this.userId,
this.id,
this.title,
});
int userId;
int id;
String title;
factory Album.fromJson(Map<String, dynamic> json) => Album(
userId: json["userId"],
id: json["id"],
title: json["title"],
);
Map<String, dynamic> toJson() => {
"userId": userId,
"id": id,
"title": title,
};
}
and use the function that #Ravindra via link like this
Future<List<Album>> fetchPost() async {
String url =
'https://jsonplaceholder.typicode.com/albums/1';
var response = await http.get(Uri.parse(url), headers: {
'Content-Type': 'application/json',
'Accept': 'application/json',
});
if (response.statusCode == 200) {
// If the call to the server was successful, parse the JSON
return Album.fromJson(json
.decode(response.body));
} else {
// If that call was not successful, throw an error.
throw Exception('Failed to load post');
}
}
Hope it helps you. Lastly you can use this link https://app.quicktype.io/ to create your model class.