Deserialize json array in Dart/Flutter

Question

How to deserialize this json array [{"i":737,"n":1}] to get the variable "i" e "n".

Class to deserialize

    class PortasAbertas {
  int i;
  int n;

  PortasAbertas({this.i, this.n});

  PortasAbertas.fromJson(Map<String, dynamic> json) {
    i = json['i'];
    n = json['n'];
  }

  Map<String, dynamic> toJson() {
    return {
      'i': i,
      'n': n
    };
  }
}

I'm trying deserialize the object using this code, but use it when dont have a array, but using array i don't know i can do it

   PortasAbertas objeto = new PortasAbertas.fromJson(responseJson);
     String _msg = ("Portas abertas: ${objeto.n}");

Solution 1

final List t = json.decode(response.body);
final List<PortasAbertas> portasAbertasList =
     t.map((item) => PortasAbertas.fromJson(item)).toList();
return portasAbertasList;

You can parse your JSON to list like that so you can use fromJson in an array.

Solution 2

You can try using this lines,

List oo = jsonDecode('[{"i":737,"n":1},{"i":222,"n":111}]');
//here u get the values from the first value on the json array
print(oo[0]["i"]);
print(oo[0]["n"]);

//here u get the values from the second value on the json array
print(oo[1]["i"]);
print(oo[1]["n"]);

and for each value from your list, u have a json and can get access the value using "i" or "n";