MissingPluginException in my flutter code - NetworkInfo().getLocationServiceAuthorization() - flutter

Question

I've written a Class to handle network connection.
I need because my app works only in a specific environment so I want to check the wifi SSID.
I use the connectivity package to check if I'm connected to WIFI.
I want to use the network_info_plus package to read the wifi SSID name, but it throws this exception:
MissingPluginException (MissingPluginException(No implementation found for method getLocationServiceAuthorization on channel dev.fluttercommunity.plus/network_info))
My code is the following:
import 'dart:async';
import 'package:network_info_plus/network_info_plus.dart' as info;
import 'package:connectivity/connectivity.dart';
import 'package:flutter/services.dart';
enum ConnectivityStatus { Connected, NotConnected }
class ConnectivityService {
// Create our public controller
StreamController<ConnectivityStatus> connectionStatusController =
StreamController<ConnectivityStatus>();
ConnectivityService() {
// Subscribe to the connectivity Chanaged Steam
Connectivity().onConnectivityChanged.listen((ConnectivityResult result) {
// Use Connectivity() here to gather more info if you need t
connectionStatusController.add(_getStatusFromResult(result));
});
}
// Convert from the third part enum to our own enum
ConnectivityStatus _getStatusFromResult(ConnectivityResult result) {
switch (result) {
case ConnectivityResult.mobile:
return ConnectivityStatus.NotConnected;
case ConnectivityResult.wifi:
_initNetworkInfo();
return ConnectivityStatus.Connected;
case ConnectivityResult.none:
return ConnectivityStatus.NotConnected;
default:
return ConnectivityStatus.NotConnected;
}
}
}
Future<String?> _initNetworkInfo() async {
String? wifiName;
final _networkInfo = info.NetworkInfo();
try {
var status = await _networkInfo.getLocationServiceAuthorization();
if (status == info.LocationAuthorizationStatus.notDetermined) {
status = await _networkInfo.requestLocationServiceAuthorization();
}
if (status == info.LocationAuthorizationStatus.authorizedAlways ||
status == info.LocationAuthorizationStatus.authorizedWhenInUse) {
wifiName = await _networkInfo.getWifiName();
} else {
wifiName = await _networkInfo.getWifiName();
}
} on PlatformException catch (e) {
print(e.toString());
wifiName = 'Failed to get Wifi Name';
}
return wifiName;
}
EDIT: I decided to create a class to handle the retrieval of wifi name:
...
case ConnectivityResult.wifi:
if (NetworkInfo().wifiName == 'WIFI_SSID_NAME') // !!! HANDLE ASYNC
return ConnectivityStatus.Connected;
else
return ConnectivityStatus.NotConnected;
...
class NetworkInfo {
String? wifiName;
NetworkInfo() {
_initNetworkInfo();
}
Future<void> _initNetworkInfo() async {
String? wifiName;
final _networkInfo = info.NetworkInfo();
try {
var status = await _networkInfo.getLocationServiceAuthorization();
if (status == info.LocationAuthorizationStatus.notDetermined) {
status = await _networkInfo.requestLocationServiceAuthorization();
}
if (status == info.LocationAuthorizationStatus.authorizedAlways ||
status == info.LocationAuthorizationStatus.authorizedWhenInUse) {
wifiName = await _networkInfo.getWifiName();
} else {
wifiName = await _networkInfo.getWifiName();
}
} on PlatformException catch (e) {
print(e.toString());
wifiName = 'Failed to get Wifi Name';
}
this.wifiName = wifiName;
}
}

Answer 1

The getLocationServiceAuthorization is only for iOS so if you are coding for Android too, you should split them into separate blocks:
final _networkInfo = info.NetworkInfo();
try {
//may throw on non-iOS platforms
var status = await _networkInfo.getLocationServiceAuthorization();
if (status == info.LocationAuthorizationStatus.notDetermined) {
status = await _networkInfo.requestLocationServiceAuthorization();
}
} on PlatformException catch (e) {
print(e.toString());
wifiName = 'Failed to verify authorization';
}
try {
wifiName = await _networkInfo.getWifiName();
} on PlatformException catch (e) {
print(e.toString());
wifiName = 'Failed to get Wifi Name';
}
Also inside /android/app/build.gradle you should insert:
shrinkResources false
minifyEnabled false
in the buildTypes/release block:
buildTypes {
release {
shrinkResources false
minifyEnabled false