How to do stream builder to get data from bloc in flutter - flutter

Question

I am new in BLOC and I am trying to read respond from api.. but whenever I call stream builder... my widget always stops in wait... here is my code
here is api provider file
class Provider {
final _url = '...';
Future<List<LoginRespon>> login(a, b) async {
List<LoginRespon> datalogin = [];
try {
bool trustSelfSigned = true;
HttpClient httpClient = new HttpClient()
..badCertificateCallback =
((X509Certificate cert, String host, int port) =>
trustSelfSigned);
IOClient http = new IOClient(httpClient);
final response = await http.post(_url,
headers: {
HttpHeaders.contentTypeHeader: 'application/json',
},
body: json.encode({
"aa": a,
"bb": b,
}));
Map<String, dynamic> responseJson = json.decode(response.body);
if (responseJson["status"] == "200") {
datalogin.add(LoginRespon(
status: responseJson['status'],
data: Data(
name: responseJson['data']['name'],
position: responseJson['data']['pos'])));
return datalogin;
} else {
print("ppp");
}
} on Exception {
rethrow;
}
return datalogin;
}
}
and here is for stream builder
isClick
? StreamBuilder(
stream: bloc.login(),
builder: (context, snapshot) {
if (snapshot.hasData) {
print(snapshot.data);
return Text("success");
} else if (snapshot.hasError) {
return Text(
snapshot.error.toString());
}
return Text("wait..");
},
)
: FlatButton(
child: Text("Login"),
onPressed: () {
setState(() {
isClick = true;
});
},
),
is there a way so that I can call print(snapshot.data) inside if (snapshot.hasData)

Answer 1

You need to pass argument which required in method otherwise it will not successfully responce (200) and it will throw error.