How Can we Access Json Data-CodePudding

{
    "success": true,
    "message": "",
    "code": 404,
    "data": [
        {
            "store": "store1",
            "store_id": 1253,
            "store_type": "B",
            "created_at": 1586259248
        },{
            "store": "store2",
            "store_id": 1253,
            "store_type": "A",
            "created_at": 1586259248
        }
    ]
}

I need to access the Store key using ForEach or Map and Need to Store in Seprate list to display in listview builder how can be access that

CodePudding user response：

So let's say you have this json response.

  final String json = '''{
    "success": true,
    "message": "",
    "code": 404,
    "data": [
        {
            "store": "store1",
            "store_id": 1253,
            "store_type": "B",
            "created_at": 1586259248
        },{
            "store": "store2",
            "store_id": 1253,
            "store_type": "A",
            "created_at": 1586259248
        }
    ]
}''';

First you need to decode it using jsonDecode, which returns a Map<String, dynamic>.

final Map<String, dynamic> decoded = jsonDecode(json);

Now to access your data you can just do decoded['data']. I'm using List.from() to convert the data to a List<Map<String, dynamic>>.

final List<Map<String, dynamic>> data = List<Map<String, dynamic>>.from(decoded['data']);

Now if you want to get all your store key values as a List.

final List<String> stores = data.map<String>((e)=> e['store']).toList();

This will give you the output

[store1, store2]

CodePudding user response：

Follow this tutorial: https://docs.flutter.dev/development/data-and-backend/json

You can access using Map<String, dynamic> user = jsonDecode(jsonString);

CodePudding user response：

You can use json_serializable
Or if you want to access value using dynamic then you can like the following code bloc

  dynamic json=jsonDecode("you source string");
  List<dynamic> list=json["data"];
  dynamic item=list[0];
  String store=item["store"];