Trying to get db row count value updated - flutter

Question

I am trying to receive in my home the total lines that exist in my database. When I run the app for the first time in my text widget appears "null", it only changes if I go to another page and go back and the value is not updated. I add another line to bd and when I go back the value goes from null to 28 for example but there is already +1 line.
In home I am getting the value inside initState with setState. Any suggestion? Thank you!!
class HomePage extends StatefulWidget {
#override
_HomePageState createState() => _HomePageState();
}
class _HomePageState extends State<HomePage> {
ContactHelper helper = ContactHelper();
List<Contact> listaSigilos = List();
int count;
#override
initState() {
super.initState();
setState(() {
helper.getAllContacts().then((list) {
listaSigilos = list;
count = listaSigilos.length;
print(list);
print("count: $count");
});
});
}
#override
Widget build(BuildContext context) {
return Scaffold(
floatingActionButton: FloatingActionButton(
backgroundColor: Colors.black,
onPressed: () {
Navigator.push(
context, MaterialPageRoute(builder: (context) => NovoSigilo()));
},
child: Icon(Icons.add),
),
appBar: AppBar(
title: Text("Stuff to do"),
backgroundColor: Colors.black,
centerTitle: true,
actions: <Widget>[],
),
body: Container(
child: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text("Active"),
Text("$count",//Show row count here
...

Answer 1

First of all never use setState() directly inside initState() method. Second, you were only listening to the database inside initState() which gets called just once, I have created a new method called _fetchData(), which is put inside initState() as well as one you come back from your second page.
#override
initState() {
super.initState();
_fetchData(); // fetch data in the start
}
void _fetchData() {
helper.getAllContacts().then((list) {
listaSigilos = list;
count = listaSigilos.length;
print(list);
print("count: $count");
setState(() {});
});
}
Update your floatingActionButton to
floatingActionButton: FloatingActionButton(
backgroundColor: Colors.black,
onPressed: () {
Navigator.push(context, MaterialPageRoute(builder: (context) => NovoSigilo())).then((value) {
_fetchData(); // fetch data after coming back to this page
});
},
child: Icon(Icons.add),
)