I have a StreamBuilder that is for a firestore.

I have a button in a different page that is saving item prices into firestore. My StreamBuilder is for the total price of these items.

​

return Scaffold(
appBar: PreferredSize(
child: AppBar(
elevation: 0,
backgroundColor: Theme.of(context).scaffoldBackgroundColor,
title: Center(child: Text('Main page')),
),
preferredSize: Size.fromHeight(30),
),
body: StreamBuilder(
stream: FirestoreAPI.getTotalUnpaid(currentUser),
builder: (BuildContext context, AsyncSnapshot snapshot) {
switch (snapshot.connectionState) {
case ConnectionState.waiting:
return Center(
child: CircularProgressIndicator(),
);
default:
if (snapshot.hasError)
return Center(child: Text(snapshot.error.toString()));
else {
return Center(
child: Text(
snapshot.data['total'].toString(),
style: style,
),
);
}
}
},
),
);

​

The StreamBuilder should keep showing the value of the 'total' field every time it changes.

However, it only updates it after I hot reload the app. Why?

Should I be calling setState somewhere?

Also, can this be resolved by didUpdateWidget?

​

I have a somewhat similar problem elsewhere where the streambuilder does not update the first time only. But works fine after that.