Flutter|Updating a ListView - flutter

Question

everyone!
I have a HomeScreen, with this code:
return SafeArea(
child: Scaffold(
body: Stack(
children: [
Padding(
padding: const EdgeInsets.only(left: 8, right: 8),
child: Column(children: [
ActiveTaskInfo(
task: tasks.first,
),
const TextWidget(),
Expanded(child: TasksList()),
const SizedBox(height: 80),
]),
),
BottomBarClass(),
],
),
),
);
TasksList() - ListView.
BottomBarClass() - It is a container with a button inside.
If you return the code itself to the main HomeScreen file, everything works, but if you put it in a separate class and when you add a new item to the list (through the button) nothing happens, but if you press Hot Reload, then the new item in the list is displayed.
Code BottomBarClass():
Positioned(
bottom: 0, left: 0,
child: ClipRRect(
borderRadius: const BorderRadius.only(topRight: Radius.circular(30), topLeft: Radius.circular(30)),
child: Container(
height: 80, width: MediaQuery.of(context).size.width,
color: const Color(0xff070417),
child: Row(mainAxisAlignment: MainAxisAlignment.spaceAround,
children: [
Icon(Icons.watch_later, color: Colors.white.withOpacity(0.4)),
IconButton(icon: Icon(Icons.add, color: Colors.white.withOpacity(0.4),), iconSize: 32, onPressed: () async {
bool result = await Navigator.push(context, MaterialPageRoute(builder: (context) {
return TaskAdding();
}));
if (result == true) {
setState(() {
});
}
}),
Icon(Icons.pie_chart_rounded, color: Colors.white.withOpacity(0.4), size: 24,),
],),
),
));
Вот пример GIF: https://gifyu.com/image/Spp1O
TaskAdding():
import 'package:flutter/material.dart';
import '../expansions/task_tags_decorations.dart';
import '../expansions/tasks_data.dart';
class TaskAdding extends StatefulWidget {
const TaskAdding({Key? key}) : super(key: key);
#override
State<TaskAdding> createState() => _TaskAddingState();
}
class _TaskAddingState extends State<TaskAdding> {
late String _addField;
late Widget _selectedValue;
late bool _active;
late int _selectedIndex;
#override
void initState() {
_addField = 'Empty';
_active = false;
_selectedValue = tasks[0].icon;
_selectedIndex = 0;
super.initState();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: Text('Add'), backgroundColor: Colors.pink),
body: Column(children: [
Text('Add Task', style: TextStyle(color: Colors.white, fontSize: 24),),
TextField(onChanged: (String value) {
_addField = value;
}),
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
DropdownButton<Widget>(
value: _selectedValue,
onChanged: (newValue) {
setState(() {
_selectedValue = newValue!;
});
},
items: dropdownItems,
),
ElevatedButton(
onPressed: () {
setState(() {
tasks.addAll({
TaskData(
taskName: _addField,
tagOne: _active
? tasks[0].tagOne
: tasks[1].tagOne,
tagTwo: tagTwoContainer[_selectedIndex],
icon: _selectedValue,
taskTime: '00:32:10',
)
});
decorations.addAll({
TaskTagsDecorations(
iconColor: const Color(0xff7012CF))
});
});
Navigator.of(context).pop(true);
},
child: const Text('Add')),
],
),
Center(
child: ListTile(
title: _active
? Center(
child: tasks[0].tagOne,
)
: Center(child: tasks[1].tagOne),
selected: _active,
onTap: () {
setState(() {
_active = !_active;
});
},
),
),
SizedBox(
height: 52,
child: ListView.builder(
shrinkWrap: true,
scrollDirection: Axis.horizontal,
itemCount: tagTwoContainer.length,
itemBuilder: (context, index) {
var tagTwoList = tasks[index].tagTwo;
return SizedBox(
height: MediaQuery.of(context).size.height, width: 160,
child: ListTile(
visualDensity: VisualDensity.compact,
selected: index == _selectedIndex,
selectedTileColor: Colors.indigo.withOpacity(0.6),
title: Align(
alignment: Alignment.topCenter,
child: tagTwoList),
onTap: () {
setState(() {
_selectedIndex = index;
});
},
),
);
}),
),
],),
);
}
List<DropdownMenuItem<Widget>> get dropdownItems {
List<DropdownMenuItem<Widget>> menuItems = [
DropdownMenuItem(
child: const Icon(Icons.free_breakfast),
value: iconCircle[0],
),
DropdownMenuItem(
child: const Icon(Icons.grade_outlined), value: iconCircle[1]),
DropdownMenuItem(child: const Icon(Icons.gamepad), value: iconCircle[2]),
DropdownMenuItem(
child: const Icon(Icons.face_rounded), value: iconCircle[3]),
];
return menuItems;
}
}

Answer 1

You question is not clear. Try to add TasksList()

Answer 2

My solution:
Navigator.push(context,
MaterialPageRoute(builder: (context) {
return HomeScreen();
}));