Widget doesn't return - flutter

Question

I am trying to return a ListView.builder but it doesn't seem to happen with the code below. I have just started to learn to use flutter and I am trying to implement flutter_insta before moving to the actual API. With the code below I receive the first debug message to the console but the second one never comes. Does anyone have any idea why does this happen? I don't get any error messages either.
class _HomePageState extends State<HomePage> {
String _username = "xxx";
FlutterInsta flutterInsta = FlutterInsta();
List<String> images = new List<String>();
bool pressed = false;
#override
void initState() {
super.initState();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Feed preview'),
),
body: homePage(),
);
}
Widget homePage(){
return Center(
child: Column(
children: [
RaisedButton(
child: Text("Load photos"),
onPressed: () async {
setState(() {
pressed = true;
printDetails(_username);
});//get Data
},
),
]
)
);
}
Future printDetails(String username) async {
await flutterInsta.getProfileData(username);
setState(() {
this.images = flutterInsta.feedImagesUrl;
});
_buildSuggestions();
}
Widget _buildSuggestions() {
print("debug");
return ListView.builder(
itemBuilder: /*1*/ (context, i) {
print("debug1");
if (i.isOdd) return Divider(); /*2*/
final index = i ~/ 2; /*3*/
return _buildRow(images[index]);
});
}
Widget _buildRow(String url) {
print("moi");
return ListTile(
trailing: Image.network(url)
);
}
}

Answer 1

_buildSuggestions have to be used somewhere in the widget tree.
class _HomePageState extends State<HomePage> {
String _username = "xxx";
FlutterInsta flutterInsta = FlutterInsta();
List<String> images = new List<String>();
bool pressed = false;
#override
void initState() {
super.initState();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Feed preview'),
),
body: homePage(),
);
}
Widget homePage(){
return Center(
child: Column(
children: [
Expanded(child: _buildSuggestions()),
RaisedButton(
child: Text("Load photos"),
onPressed: () async {
setState(() {
pressed = true;
printDetails(_username);
});//get Data
},
),
]
)
);
}
Future printDetails(String username) async {
await flutterInsta.getProfileData(username);
setState(() {
this.images = flutterInsta.feedImagesUrl;
});
}
Widget _buildSuggestions() {
print("debug");
return ListView.builder(
itemBuilder: /*1*/ (context, i) {
print("debug1");
if (i.isOdd) return Divider(); /*2*/
final index = i ~/ 2; /*3*/
return _buildRow(images[index]);
});
}
Widget _buildRow(String url) {
print("moi");
return ListTile(
trailing: Image.network(url)
);
}
}

Answer 2

You need to render to _buildSuggestion in widget tree first.
You need to put itemCount to ListView.Builder
Checkout: https://api.flutter.dev/flutter/widgets/ListView/ListView.builder.html