How to display in dialog variable from API request in Flutter - flutter

Question

I want to access the variable totalPresences that I have in my API request where I sum up the values from a map. Then I want to display the variable in my widget inside a dialog. How can I do that? Thanks in advance!
Here is my code
Future<List<Presence>> getPresencesByAthleteId() async {
try {
final response = await http.get(
Uri.parse();
if (response.statusCode == 200) {
Map map = json.decode(response.body);
List<Presence>? presencesList = [];
map.forEach((key, value) {
presencesList.add(Presence(
date: map.entries.first.key, count: map.entries.first.value));
var values = map.values;
var totalPresences = values.reduce((sum, element) => sum + element); //this I want to display it in a text
});
return presencesList.toList();
}
} catch (e) {
logger.e(e.toString());
}
return getPresencesByAthleteId(depId, teamId, id, context);
}
#override
Widget build(BuildContext context) {
return Scaffold(
body: FutureBuilder<List<Athlete>>(
...
secondary: IconButton(
icon: const Icon(Icons.history_outlined,
color: Colors.black, size: 25),
onPressed: () {
if (_athlete[i].currentMonthPresences! > 0) {
showDialog(
context: context,
builder: (BuildContext context) {
return SimpleDialog(
children: [
Column(
FutureBuilder<List<Presence>>(
future: getPresencesByAthleteId(_athlete[i].department!.id, widget._team.teamKey!.teamId, _athlete[i].id, context),
builder: (BuildContext context, AsyncSnapshot snapshot) {
if (snapshot.hasData) {
...
}),
);
} else if (snapshot.hasError) {
logger.e('${snapshot.error}');
}
}),
Container(
child:
Row(
children: [
const Text(''), // HERE I WANT TO DISPLAY totalPresences
)
],
),
),

Answer 1

It was easier than I thought I just needed a setState inside my api request like this:
int total=0;
Future<List<Presence>> getPresencesByAthleteId() async {
try {
final response = await http.get(
Uri.parse();
if (response.statusCode == 200) {
Map map = json.decode(response.body);
List<Presence>? presencesList = [];
map.forEach((key, value) {
presencesList.add(Presence(
date: map.entries.first.key, count: map.entries.first.value));
var values = map.values;
var totalPresences = values.reduce((sum, element) => sum + element);
setState(() {
totalPresences = total;
});
});
return presencesList.toList();
}
} catch (e) {
logger.e(e.toString());
}
return getPresencesByAthleteId(depId, teamId, id, context);
}
and then just display in dialog
.
.
const Text($total),