I'm new in Flutter. I got an issue where i cannot POST data using http after get location.
This is the code
void postData() async {
prefs = await SharedPreferences.getInstance();
bool isAutoCheckIn = prefs.getBool(helper.ISAUTO_CHECKIN) ?? false;
var sessionId = prefs.getString(helper.SESSION_ID);
var employeeId = prefs.getInt(helper.EMPLOYED_ID).toString();
var _uri = Uri.parse(
helper.CHECK_IN + employeeId);
var header = {"session-id": sessionId!};
try {
if (valid) {
Position position = await Geolocator.getCurrentPosition(
desiredAccuracy: LocationAccuracy.medium);
var _center = LatLng(position.latitude, position.longitude);
List<Placemark> p = await placemarkFromCoordinates(
_center.latitude, _center.longitude);
Placemark place = p[0];
var address =
"${place.street}, ${place.locality}, ${place.subAdministrativeArea}";
var body = {
"test": address
};
final response = await http.post(_uri, headers: header, body: body);
if (response.statusCode == 200) {
dynamic _data = json.decode(response.body);
}
}
} catch (err) {
throw Exception(err);
}
}
Problem comes after this code
List<Placemark> p = await placemarkFromCoordinates(
_center.latitude, _center.longitude);
It will never reach code below it. I am using http: ^0.13.5 geolocator: ^7.7.1 geocoding: ^2.0.5. Am I doing wrong here? Please kindly help me. Thank you
Related
I am trying to do so using Multipartfile class. My field name in the strapi is profile_image. Other details are updated, but neither image is uploaded in the media library, nor image is updated for this particular record.
try {
var url = "${kAPIURL}users/${bodyData["id"]}";
var imageBytes = await image!.readAsBytes();
int length = imageBytes.length;
http.ByteStream byteStream = http.ByteStream(image.openRead());
Stream<List<int>> stream = byteStream.cast();
var request = http.MultipartRequest('PUT', Uri.parse(url));
request.headers['Authorization'] = 'Bearer ${bodyData["jwt"]}';
request.fields['id'] = bodyData['id'];
request.fields['username'] = bodyData['username'];
request.fields['specific_type'] = bodyData['specific_type'];
request.fields['sex'] = bodyData['sex'];
request.fields['phone_number'] = bodyData['phone_number'];
request.fields['email'] = bodyData['email'];
var profileImage = http.MultipartFile(
'files.profile_image', stream, length,
filename: image.path.split('/').last.toString(),
contentType: MediaType('image', 'jpg'));
request.files.add(profileImage);
var response = await request.send();
response.stream.transform(utf8.decoder).listen((value) {
print(value);
});
if (response.statusCode == 200) {
Provider.of<MainScreenProvider>(context, listen: false).isDeleteCache =
true;
return response;
} else {
return response;
}
} on Exception {
throw Exception("Unable to update user details.");
}
I'm trying to post PaltformFiles to the server using Multipart Requests but keep getting the above error for some strange reason. I would like to know what I can do to resolve this error. The code I have written is given below.
File Picker Method:
onTap: () async {
final filePickerOne = await FilePicker.platform
.pickFiles(
type: FileType.custom,
allowedExtensions: [
'pdf',
'jpg',
'jpeg',
'png'
]);
if (filePickerOne == null) return;
final fileOne = filePickerOne.files.first;
openFile(fileOne);
print('Name: ${fileOne.name}');
setState(() {
fileOneName = fileOne.name;
panDoc = fileOne;
});
print('Bytes: ${fileOne.bytes}');
print('Size: ${fileOne.size}');
print('Extension: ${fileOne.extension}');
print('Path: ${fileOne.path}');
The API Request:
Future<void> postMethod(
String? organizationName,
String? telephoneNumberOne,
String? telephoneNumberTwo,
String? companyPanCard,
PlatformFile? panCard,
String? aadharUdyamUdoyog,
PlatformFile? aadharCard,
String? gstNumber) async {
SharedPreferences localStorage = await SharedPreferences.getInstance();
// final File filePanCard = File(panCard!.path.toString());
// final File fileAadharCard = File(aadharCard!.path.toString());
final url = Uri.parse(baseUrl + 'api/vendor/profile/business/');
var request = http.MultipartRequest('POST', url);
request.headers
.addAll({'Authorization': 'Bearer ${localStorage.getString('token')}'});
request.fields['org_name'] = organizationName!;
request.fields['telephone_1'] = telephoneNumberOne!;
request.fields['telephone_2'] = telephoneNumberTwo!;
request.fields['company_pancard'] = companyPanCard!;
request.files.add(http.MultipartFile.fromBytes(
'company_pancard_doc', File(panCard!.toString()).readAsBytesSync())); //This is where the error gets thrown
request.fields['adhar_udyam_udoyog'] = aadharUdyamUdoyog!;
request.files.add(http.MultipartFile.fromBytes('adhar_udyam_udoyog_doc',
File(aadharCard!.toString()).readAsBytesSync())); //Resolving the aboe error will hopefully resolve this one as well.
request.fields['gst_number'] = gstNumber!;
var response = await request.send();
print('Response: $response');
if (response.statusCode == 200) {
print('Uploaded');
} else {
print('Failed');
}
}
Any Ideas? Do let me know If you more info.
I want to check if new update is available for my application or not. if update is available redirect user to UpdateScreen and if update is not available get the user info and redirect to HomeScreen
_check() async {
await _checkForUpdate();
await _getUserData(token);
}
_checkForUpdate() async {
print('check for update');
var url = Uri.parse(Endpoints.mainData);
var response = await http.get(url);
var jsonResponse = convert.jsonDecode(response.body);
var data = jsonResponse['data'];
int lastVersionCode = data['lastVersionCode'];
if(lastVersionCode > Data.versionCode){
redirectToScreen(context, UpdateScreen());
}
}
_getUserData(String token) async {
print('get user data');
var url = Uri.parse(Endpoints.accountInfo + '/?token=' + token);
var response = await http.get(url);
var jsonResponse = convert.jsonDecode(response.body);
var data = jsonResponse['data'];
//setup user data in my app
redirectToScreen(context, HomeScreen());
When I run my application two methods( _checkForUpdate, _getUserData) get fired and in output I the get following message that i printed:
check for update
get user data
and i see Update screen for 1 second and then user is redirect to HomeScreen.
i want to skip running the other codes after _checkForUpdate redirect user to UpdateScreen
return a bool whether there is an update available and use it to skip other methods:
_check() async {
bool needsUpdate = await _checkForUpdate();
if (!needsUpdate)
await _getUserData(token);
}
Future<bool> _checkForUpdate() async {
print('check for update');
var url = Uri.parse(Endpoints.mainData);
var response = await http.get(url);
var jsonResponse = convert.jsonDecode(response.body);
var data = jsonResponse['data'];
int lastVersionCode = data['lastVersionCode'];
if (lastVersionCode > Data.versionCode) {
redirectToScreen(context, UpdateScreen());
return true;
}
return false;
}
I have problem in api calling i getting a geolocation of current place,i am passing the latitude&longitude
but i having a problem is i need to pass the latitude&longitude to certain format like this lat_11.3054724$75.8744252 so i can't try to concatinate the $ sign along with it,Also i am not getting any data when i pass latitude&longitude data i cannot use in api it throws
unhandled Exception: NoSuchMethodError: The getter 'latitude' was called on null.
E/flutter (27500): Receiver: null
E/flutter (27500): Tried calling: latitude
But i can print the data to Text but not pass to api
Code
Future<String> getMainbanner() async {
var latitude=_currentPosition.latitude.toString();
var longitude=_currentPosition.longitude.toString();
var response = await http.post(Urls.HOME_BANNER,
headers: {"Content-Type": "application/json"},
body: json.encode({
"banner_type": "Main_Banner",
"location": "lat_"+latitude+'$'+longitude,
}),);
Map<String, dynamic> value = json.decode(response.body);
if (response.statusCode == 200) {
var resp = response.body;
Map<String, dynamic> value = json.decode(resp);
var message = value['msg'];
var banner =value['bannerapp'][0];
for (int i = 0; i < banner.length; i++) {
var data = banner[i];
print("Data:"+data);
}
}
else
{
CustomDialogs().showErrorAlert(context, "Main Banner Image NotFound");
}
}
Code for fetching Current location
_getCurrentLocation() {
final Geolocator geolocator = Geolocator()..forceAndroidLocationManager;
geolocator
.getCurrentPosition(desiredAccuracy: LocationAccuracy.best)
.then((Position position) {
setState(() {
_currentPosition = position;
});
}).catchError((e) {
print(e);
});
}
Edit: The problem is, that _currentLocation is still null when you call _currentLocation.latitude, because _getcurrentLocation() needs some time to set it. There are different approaches to make it work, depending on how your architecture looks.
Change _getCurrentLocation() to an async function
Future<void> _getCurrentLocation() async {
final Geolocator geolocator = Geolocator()..forceAndroidLocationManager;
try {
final position = await geolocator.getCurrentPosition(desiredAccuracy: LocationAccuracy.best);
setState(() {
_currentPosition = position;
});
} catch(e) {
print(e);
}
}
And await on it inside getMainbanner
Future<String> getMainbanner() async {
await _getCurrentLocation();
var latitude=_currentPosition.latitude.toString();
var longitude=_currentPosition.longitude.toString();
var response = await http.post(Urls.HOME_BANNER,
headers: {"Content-Type": "application/json"},
body: json.encode({
"banner_type": "Main_Banner",
"location": "lat_"+latitude+'$'+longitude,
}),);
Map<String, dynamic> value = json.decode(response.body);
if (response.statusCode == 200) {
var resp = response.body;
Map<String, dynamic> value = json.decode(resp);
var message = value['msg'];
var banner =value['bannerapp'][0];
for (int i = 0; i < banner.length; i++) {
var data = banner[i];
print("Data:"+data);
}
}
else
{
CustomDialogs().showErrorAlert(context, "Main Banner Image NotFound");
}
}
The problem is the $. $ is a special character in dart strings for interpolation so you have to add an escape \ before it.
See here:
https://dart.dev/guides/language/language-tour#strings
And you can make use of this string interpolation to build your string:
var latitude=_currentPosition.latitude;
var longitude=_currentPosition.longitude;
....
"location":"lat_$latitude\$$longitude"
...
Also, you don't need the toString() for latitude and longitude
in this code below WeatherModel tried to get current location of android phone,
my problem here is once I start runing it show NoSuchMethod Found, and it says reciever is null,
as I tried a lot of debugging just to see where is my problem.
I now understand that my problem is when I create instance of Location() in WeatherModel, longitude and latitude are null, it never gets value and I dont know why...
Sorry for my bad english :(
const apiKey = 'e3653190f2b1d4803287b3074ecfe618';
const apiWeatherURL = 'https://api.openweathermap.org/data/2.5/weather';
class WeatherModel {
Future<dynamic> getLocationWeather() async {
Location location = Location();
NetworkHelper networkHelper = NetworkHelper(
'https://api.openweathermap.org/data/2.5/weather?lat=${location.latitude}&lon=${location.longitude}&appid=$apiKey');
var weatherData = networkHelper.getData();
return weatherData;
}
}
.....
class Location {
double latitude;
double longitude;
Future<void> getCurrentLocation() async {
try {
Position _position = await Geolocator()
.getCurrentPosition(desiredAccuracy: LocationAccuracy.high);
longitude = _position.longitude;
print(longitude);
latitude = _position.latitude;
print(latitude);
} catch (e) {
print(e);
}
}
}
.........
class NetworkHelper {
NetworkHelper(this.url);
final url;
Future getData() async {
http.Response response = await http.get(url);
if (response.statusCode == 200) {
var data = jsonDecode(response.body);
print(" Sarkawtua $data");
return data;
} else
print("Error ${response.statusCode} keshay Internet");
}
}
Because you instance fields are not updated, so they are null. You have method for getting current location but it's not fired in getLocationWeather.
Future<dynamic> getLocationWeather() async {
Location location = Location();
await location.getCurrentLocation();
NetworkHelper networkHelper = NetworkHelper(
'https://api.openweathermap.org/data/2.5/weather?lat=${location.latitude}&lon=${location.longitude}&appid=$apiKey');
var weatherData = await networkHelper.getData();
return weatherData;
}
Edit: You also must await networkHelper.getData() method to get not Future Object.