read user info from FirebaseFirestore in StreamBuilder - flutter

Question

I'm trying to read document info from Database this my code
abstract class Database{
Future<void> sendText(SendOrder textData);
Stream<QuerySnapshot<Map<String, dynamic>>> readDataStream();
}
class FirestoreDatabase implements Database{
FirestoreDatabase({required this.uid});
final String uid;
#override
Future<void> sendText(SendOrder textData) async {
final documentRefer = FirebaseFirestore.instance.collection('userInfo').doc(uid);
await documentRefer.set(textData.toMap());
}
#override
Stream<QuerySnapshot<Map<String, dynamic>>> readDataStream() {
return FirebaseFirestore.instance.collection('userInfo').where('uid', isEqualTo: uid).snapshots();
}
}
with send text I got no problem but read data I got problem
getData() async{
return database.readDataStream().map((snapshot) => snapshot.docs);
}
Future<void> _dataSend(BuildContext context) async {
await database.sendText(SendOrder(userName: 'name', coins: '12', level: '12'));
}
body: StreamBuilder<Database>(
builder: (context, snapshot){
return Column(
children: [
ElevatedButton(onPressed: () {
_dataSend(context);
}, child:
const Text('Click')),
Text(
getData().toString()
, style: const TextStyle(color: Colors.white),
)
],
);
},
)
I need to read map data but I have problem becuase I'm new flutter developer , don't know how to convert data or where comes from
so how to read data?
Is my code right to read as StreamBuilder?

Answer 1

You had not set stream for your StreamBuilder. Check below code for simple StreamBuilder:
class HomePage extends StatelessWidget {
const HomePage({Key? key}) : super(key: key);
Stream<String> _generateNumbers() async* {
for (int i = 1; i <= 10; i++) {
await Future<void>.delayed(const Duration(seconds: 1));
yield "$i";
}
}
#override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: StreamBuilder<String>(
stream: _generateNumbers(),
builder: (context, snapshot) {
if (snapshot.connectionState == ConnectionState.waiting) {
return const CircularProgressIndicator();
} else if (snapshot.connectionState == ConnectionState.active
|| snapshot.connectionState == ConnectionState.done) {
if (snapshot.hasError) {
return const Text('Error');
} else if (snapshot.hasData) {
return Text(
snapshot.data ?? '',
style: const TextStyle(color: Colors.red, fontSize: 40)
);
} else {
return const Text('Empty data');
}
} else {
return Text('State: ${snapshot.connectionState}');
}
},
),
),
);
}
}