SetState not updating listview - flutter

Question

Im trying to make it so when you press search it creates a listtile. It works but for it to work I have to click the button and then rebuild the app for it to appear. I was looking at some other posts but I could not find anything that worked. The main parts to look at is I have a function that adds a listtile. I have a button with an on press to create the tile. And I have the children of container at the bottom as the list of created listtiles.
class Home extends StatefulWidget {
const Home({Key? key}) : super(key: key);
#override
State<Home> createState() => _HomeState();
}
class _HomeState extends State<Home> {
List<Widget> _listOfWidgets = [];
#override
Widget build(BuildContext context) {
_addItemToList() {
List<Widget> tempList =
_listOfWidgets; // defining a new temporary list which will be equal to our other list
tempList.add(ListTile(
key: UniqueKey(),
leading: Icon(Icons.list),
trailing: FlatButton(
onPressed: () async {},
//Download Link
child: Text(
"Download",
style: TextStyle(color: Colors.green, fontSize: 15),
),
),
title: Text("")));
this.setState(() {
_listOfWidgets =
tempList; // this will trigger a rebuild of the ENTIRE widget, therefore adding our new item to the list!
});
}
return MaterialApp(
theme: ThemeData.light(),
darkTheme: ThemeData.dark(),
themeMode: currentTheme.currentTheme(),
home: Scaffold(
appBar: AppBar(
actions: [
IconButton(
onPressed: () {
setState(() {
currentTheme.switchTheme();
});
},
icon: Icon(Icons.wb_sunny),
),
IconButton(
onPressed: () async {
await FirebaseAuth.instance.signOut();
},
icon: Icon(Icons.exit_to_app),
),
],
backgroundColor: Colors.blue,
title: Text("Home"),
),
body: ListView(
children: [
ListTile(
leading: SizedBox(
width: 300,
child: TextField(
controller: search,
decoration: InputDecoration(
labelText: "Enter Manga Name",
),
),
),
trailing: ElevatedButton(
onPressed: () async {
_addItemToList();
},
child: Text("Search")),
),
Container(
margin: EdgeInsets.all(15),
width: 100,
height: 515,
color: Colors.black12,
child: ListView(
children: _listOfWidgets,
))
],
)));
}
}

Answer 1

try add below code
if you update status you need setState()
A better way to state management is to use a BLoC or Provider package.
...
onPressed: () {
setState(() {
_addItemToList();
});
},
...

Answer 2

Figured it out after a bit of tinkering. Fix for me was to add key: UniqueKey(), to my ListView. I had keys added to my ListTiles instead of the actual ListView.

Answer 3

onPressed: () {
setState(() {
_addItemToList();
});
},
The Problem Solution is :
List<Widget> tempList = <Widget>[];
_addItemToList() {
tempList.addAll(
_listOfWidgets); // defining a new temporary list which will be equal to our other list
tempList.add(ListTile(
key: UniqueKey(),
leading: Icon(Icons.list),
trailing: FlatButton(
onPressed: () async {},
//Download Link
child: Text(
"Download",
style: TextStyle(color: Colors.green, fontSize: 15),
),
),
title: Text("")));
this.setState(() {
_listOfWidgets =
tempList; // this will trigger a rebuild of the ENTIRE widget, therefore adding our new item to the list!
});
}