getting response but not getting key value while calling get api in flutter ,some rendering issue till i seached for the same

Question

{success: true} E/flutter (16591): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: NoSuchMethodError: The method '[]' was called on null. E/flutter (16591): Receiver: null E/flutter (16591): Tried calling:

Future _onSubmitClick(String ifscdataa) async{

//String profile = url+ifscdataa;
final uri = url+ifscdataa;

paramsToken = widget._token;

final headers = {
  'Content-Type': 'application/x-www-form-urlencoded',
  'X-Requested-With': 'XMLHttpRequest',
  //'Authorization': 'Bearer $paramsToken',
  'Authorization': widget._token,
};

print('Bearer $paramsToken');

Response response = await get(
  uri,
  headers: headers,
);
var res = json.decode(response.body);
print(res);

if (response.statusCode == 200) {
  setState(() {
    bank_name = res['data']['BankName'].toString() ?? "";
    distrcit_name = res['data']['DistrictName'] ?? "";
    branch_name = res['data']['BranchName'] ?? "";
    state_name = res['data']['StateName'] ?? "";

    print('>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>$distrcit_name');
    print(bank_name);

  });

} else if (response.statusCode == 401) {
  Fluttertoast.showToast(msg: res['message'], timeInSecForIos: 3);

} else {
  Fluttertoast.showToast(msg: res['message'], timeInSecForIos: 3);
}

}

this is my response from api -{ "success": true, "data": { "BankName": "///// BANK OF ////", "StateName": "Rajasthan", "DistrictName": "//// city", "BranchName": "//// /// ROAD, //// city" } } — s.j, Nov 05 '20 at 07:12
https://medium.com/@diegoveloper/flutter-widget-size-and-position-b0a9ffed9407 this solution relate to my case or not.? — s.j, Nov 05 '20 at 12:18

SriDatta Yalla · Answer 1 · 2020-11-05T07:40:45.657

1

I think error is raising here

bank_name = res['data']['BankName'].toString() ?? "";
distrcit_name = res['data']['DistrictName'] ?? "";
branch_name = res['data']['BranchName'] ?? "";
state_name = res['data']['StateName'] ?? "";

Instead of accessing res['data'] directly, make a check that does it even exist in the first place

bool hasData = res['data']!=null;
if(hasData){
  bank_name = res['data']['BankName'].toString() ?? "";
  distrcit_name = res['data']['DistrictName'] ?? "";
  branch_name = res['data']['BranchName'] ?? "";
  state_name = res['data']['StateName'] ?? "";
}
else{
  bank_name = "";
  distrcit_name = "";
  branch_name = "";
  state_name = "";
}

edited Nov 05 '20 at 07:40

answered Nov 05 '20 at 07:25

SriDatta Yalla

766
8
13

ok i try this with updated one. – s.j Nov 05 '20 at 07:31
I've edited the answer, please try that – SriDatta Yalla Nov 05 '20 at 07:33
ok can you share in detail – s.j Nov 05 '20 at 07:37
have you tried above answer? now I've edited it match your need. – SriDatta Yalla Nov 05 '20 at 07:41
Tell me if that solved your issue – SriDatta Yalla Nov 05 '20 at 08:06
yes i tried its going in else condition. – s.j Nov 05 '20 at 08:10
tried tthis - bool hasData = res['data']!=null; if(hasData){ //now assign data bank_name = res['data']['BankName'].toString() ?? ""; distrcit_name = res['data']['DistrictName'] ?? ""; branch_name = res['data']['BranchName'] ?? ""; state_name = res['data']['StateName'] ?? ""; } else{ bank_name = "daTAAA"; distrcit_name = "null"; branch_name = "null"; state_name = "null"; } – s.j Nov 05 '20 at 08:12
Let us [continue this discussion in chat](https://chat.stackoverflow.com/rooms/224140/discussion-between-s-j-and-sridatta-yalla). – s.j Nov 05 '20 at 08:13

getting response but not getting key value while calling get api in flutter ,some rendering issue till i seached for the same

1 Answers1