Flutter, problem using InitState method and problem using setState - flutter

Question

I have tried many things to get to call an API and get data, this has been satisfactory but I have not been able to do it from the correct method, when I do it from build it works perfectly but it is not the right place, when I try to do it in initState it simply does not it works, it doesn't even execute the print ();
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
import 'dart:convert';
class Post {
final List<dynamic> data;
Post({this.data});
factory Post.fromJson(Map<String, dynamic> json) {
return Post(
data: json['response'],
);
}
}
class LoaderPublicity extends StatefulWidget {
#override
State<StatefulWidget> createState() {
// TODO: implement createState
return _LoaderPublicity();
}
}
class _LoaderPublicity extends State<LoaderPublicity> {
List allPublicity;
#override
void initState() {
super.initState();
getPublicity().then((value) {
print(allPublicity);
});
print(allPublicity);
}
//Obtener todas las publicidades desde el api
Future<void> getPublicity() async {
var response = await http.post(
'http://contablenift.co:3008/consult/getGeneralPublicity',
body: {'actividad': "Turistico", 'location': "No"});
print('????????2');
if (response.statusCode == 200) {
setState(() {
allPublicity = Post.fromJson(json.decode(response.body)).data;
});
}
}
#override
Widget build(BuildContext context) {
getPublicity();
// TODO: implement build
return Container(
child: Column(
children: <Widget>[Text('Aqui va la publicidad')],
),
);
}
}
**
Solved the problem, after going to the entire development team we realized that my phone did not have internet, happy day**

Answer 1

The code below should work, I've added a callback in the initState method.
class LoaderPublicity extends StatefulWidget {
#override
State<StatefulWidget> createState() {
// TODO: implement createState
return _LoaderPublicity();
}
}
class _LoaderPublicity extends State<LoaderPublicity> {
List allPublicity;
#override
void initState() {
super.initState();
getPublicity().then((value) {
print(allPublicity);
print(value);
});
}
//Obtener todas las publicidades desde el api
Future<void> getPublicity() async {
var response = await http.post(
'http://contablenift.co:3008/consult/getGeneralPublicity',
body: {'actividad': "Turistico", 'location': "No"})
print('????????2');
if (response.statusCode == 200) {
setState(() {
allPublicity = Post.fromJson(json.decode(response.body)).data;
});
}
}
#override
Widget build(BuildContext context) {
return Container(
child: Column(
children: <Widget>[Text('Aqui va la publicidad')],
),
);
}
}