No implementation found for method listen on channel for ConnectionStatus library - flutter

Question

I'm trying to use FlutterCheckInternetConnectivity on our application, after run application i get this error:
plugins.flutter.io/connectivity_status:
MissingPluginException(No implementation found for method listen on channel
plugins.flutter.io/connectivity_status)
on this part of code:
void dispose() {
connectionChangeController.close();
}
ConnectionStatusSingleton class:
class ConnectionStatusSingleton {
static final ConnectionStatusSingleton _singleton = new ConnectionStatusSingleton._internal();
ConnectionStatusSingleton._internal();
static ConnectionStatusSingleton getInstance() => _singleton;
bool hasConnection = false;
StreamController connectionChangeController = new StreamController.broadcast();
final Connectivity _connectivity = Connectivity();
void initialize() {
_connectivity.onConnectivityChanged.listen(_connectionChange);
checkConnection();
}
Stream get connectionChange => connectionChangeController.stream;
void dispose() {
connectionChangeController.close();
}
void _connectionChange(ConnectivityResult result) {
checkConnection();
}
Future<bool> checkConnection() async {
bool previousConnection = hasConnection;
try {
final result = await InternetAddress.lookup('google.com');
if (result.isNotEmpty && result[0].rawAddress.isNotEmpty) {
hasConnection = true;
} else {
hasConnection = false;
}
} on SocketException catch(_) {
hasConnection = false;
}
if (previousConnection != hasConnection) {
connectionChangeController.add(hasConnection);
}
return hasConnection;
}
}
my implemented this library:
main() {
ConnectionStatusSingleton connectionStatus = ConnectionStatusSingleton.getInstance();
connectionStatus.initialize();
runApp(MaterialApp(
...
));
}
_FragmentPostsState widget class:
class _FragmentPostsState extends State<FragmentPosts> {
StreamSubscription _connectionChangeStream;
bool isOffline = false;
#override
void initState() {
super.initState();
ConnectionStatusSingleton connectionStatus = ConnectionStatusSingleton.getInstance();
_connectionChangeStream = connectionStatus.connectionChange.listen(connectionChanged);
}
#override
Widget build(BuildContext context) {
return (isOffline)
? Center(...)
: PostPage();
}
void connectionChanged(dynamic hasConnection) {
setState(() {
print('connection changed ...');
isOffline = !hasConnection;
});
}
}

Answer 1

I had this same problem and eventually I restarted the app from command-line and this solved the problem.