Below is the JSON data retrieved successfully from the server in flutter application
{
"error": "false",
"notification": [
{
"rn": "1",
"id": "224",
"company_details": {
"code": "2",
}
},
{
"rn": "2",
"id": "219",
"company_details": {
"code": "3",
}
},
{
"rn": "3",
"id": "213",
"company_details": {
"code": "3",
}
},
{
"rn": "4",
"id": "209",
"company_details": {
"code": "4",
}
},
{
"rn": "5",
"id": "204",
"company_details": {
"code": "3",
}
},
{
"rn": "6",
"id": "199",
"company_details": {
"code": "3",
}
},
{
"rn": "7",
"id": "193",
"company_details": {
"code": "3",
}
}
],
}
The code used here is below
List notificationsList;
getnotifications(int page) async {
Map data = {
'user_id': “VICKY,
"page":page.toString()
};
var response = await http.post(companyorders, body: data);
if(response.statusCode == 200) {
jsonResponse = json.decode(response.body);
print('Response status: ${response.statusCode}');
print('Response body: ${response.body}');
String errorcheck = jsonResponse['error'];
companyDetail = NotificationModel.fromJson(json.decode(response.body));
companyDetail = NotificationModel.fromJson(json.decode(response.body));
print('names of companies');
print(companyDetail.content);
List list = jsonResponse['notification'];
notificationsList.add(list);
}
}
When I tried to add the list
to the notificationsList
I got the below error
Unhandled Exception: NoSuchMethodError: The method 'add' was called on null. Receiver: null Tried calling: add(Instance(length:7) of '_GrowableList') #0 Object.noSuchMethod (dart:core-patch/object_patch.dart:51:5)
I want to add the data retrieved to the notificationsList
, how should I do that
You need to initialize
notificationsList
:Also since
list
is an iterable therefore useaddAll()