Flutter how to check Internet connection is available or not - flutter

Question

I am trying to use this plugin https://pub.dev/packages/connectivity/example Issue is its not showing or print internet is connected or not.
This is my code
class _HomePageState extends State<HomePage> {
String _connectionStatus = 'Unknown';
final Connectivity _connectivity = Connectivity();
StreamSubscription<ConnectivityResult> _connectivitySubscription;
#override
void initState() {
super.initState();
initConnectivity();
_connectivitySubscription =
_connectivity.onConnectivityChanged.listen(_updateConnectionStatus);
WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
if (mounted) {
if (userManager.getCurrentDriver() != null &&
userManager.getCurrentDriver().isNotEmpty) {
FirebaseFirestore.instance
.collection(FIREBASE_PATH_TRIP)
.doc(userManager.getCurrentDriver())
.get()
.then((event) {
if (event != null) {
var trip =
DriverModel.fromMap(Map<String, dynamic>.from(event.data()));
Provider.of<TripState>(context, listen: false).driver = trip;
Provider.of<BottomSheetSelector>(context, listen: false)
.changeSheet(SheetType.Profile);
} else {
userManager.saveCurrentDriver('');
}
});
}
if (Theme.of(context).platform == TargetPlatform.android) {
checkForAndroidUpdate(context);
}
}
});
}
#override
void dispose() {
_connectivitySubscription.cancel();
super.dispose();
}
Future<void> initConnectivity() async {
ConnectivityResult result;
// Platform messages may fail, so we use a try/catch PlatformException.
try {
result = await _connectivity.checkConnectivity();
} on PlatformException catch (e) {
print(e.toString());
}
// If the widget was removed from the tree while the asynchronous platform
// message was in flight, we want to discard the reply rather than calling
// setState to update our non-existent appearance.
if (!mounted) {
return Future.value(null);
}
return _updateConnectionStatus(result);
}
#override
Widget build(BuildContext context) {
final _drawerKey = GlobalKey<ScaffoldState>();
ScreenUtil.init(context);
return SafeArea(
child: WillPopScope(
child: Scaffold(
key: _drawerKey,
backgroundColor: Colors.black,
resizeToAvoidBottomInset: false,
drawer: ViteDrawer(),
body: null,
),
));
}
Future<void> _updateConnectionStatus(ConnectivityResult result) async {
switch (result) {
case ConnectivityResult.wifi:
case ConnectivityResult.mobile:
case ConnectivityResult.none:
setState(() => _connectionStatus = result.toString());
break;
default:
setState(() => _connectionStatus = 'Failed to get connectivity.');
break;
}
}
}
What i need to do is simple print if internet is connected or not. I want to show alert but print is ok so ill manage it. But dont know why its not printing anything

Answer 1

You can try with this
Future<bool> check() async {
var connectivityResult = await (Connectivity().checkConnectivity());
if (connectivityResult == ConnectivityResult.mobile) {
print("Connected}");
return true;
} else if (connectivityResult == ConnectivityResult.wifi) {
print("Connected}");
return true;
}
print("not Connected}");
// return You can add your dialog for notify user to your connectivity is off
}

Answer 2

you can use below code to check the connectivity
Future<bool> checkInternetConnectivity() async {
try {
final result = await InternetAddress.lookup('google.com');
if (result.isNotEmpty && result[0].rawAddress.isNotEmpty) {
return true;
} else {
return false;
}
} on SocketException catch (_) {
return false;
}
}

Answer 3

simple
Future<bool> isConnected() async {
var result = await Connectivity().checkConnectivity();
return result != ConnectivityResult.none;
}