Flutter: send data from first screen to second screen - database

Question

I have little problem and I don't know how I can solve this. I am fetching datas from database and when I click on the list it is navigating to new screen. I mean I want to fetch datas which are on first screen to second screen. it is not giving me error but the simulator gives me this and codes below here:
class ServisIhaleEkran extends StatelessWidget {
final url = 'https://escar.com/cek.php';
Future<List<dynamic>> getIhaleData() async {
var response = await http.get(url);
return json.decode(response.body);
}
String _brand(dynamic user) {
return user['marka'];
}
String _model(dynamic user) {
return user['model'];
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: FutureBuilder<List<dynamic>>(
future: getIhaleData(),
builder: (context, snapshot) {
if (snapshot.hasData) {
return ListView.builder(
itemCount: snapshot.data.length,
itemBuilder: (context, index) {
return Card(
child: Column(
children: <Widget>[
ListTile(
title: Text(
_brand(
snapshot.data[index],
).toString(),
),
onTap: () => _sendDataToSecondScreen(context),
),
],
),
);
},
);
} else {
return Center(child: Text('Error'));
}
},
),
);
}
void _sendDataToSecondScreen(BuildContext context) {
String brandSend = _brand.toString();
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => Details(brand: brandSend),
));
}
}
class Details extends StatelessWidget {
final String brand;
Details({this.brand});
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: Center(
child: Text(brand),
));
}
}
The First Screen: ServisIhaleEkran
The Second Screen: Details
I think, the problem is here:
void _sendDataToSecondScreen(BuildContext context) {
String brandSend = _brand.toString();
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => Details(brand: brandSend),
));
}
}
probably String brandSend = _brand.toString(); is giving me error but I don't know what is this, please help me, thanks.
and my first screen:

Answer 1

Rasat change your code as below:
void _sendDataToSecondScreen(BuildContext context, String brandSend) {
//String brandSend = _brand.toString();
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => Details(brand: brandSend),
));
}
And use it in your widget as:
ListTile(
title: Text(
_brand(
snapshot.data[index],
).toString(),
),
onTap: () => _sendDataToSecondScreen(context, _brand(snapshot.data[index])),
),