👀 Views: 0 💬 Answers: 1 📅 Created: 2025-07-11

flutter state-management async-await Dart

I'm converting an old project and I've been struggling with this for a few days now and could really use some help. I'm working on a personal project and Quick question that's been bugging me - I'm facing an issue where my `StatefulWidget` does not update its state as expected after a `Future` completes... I'm using Flutter version 2.10 and have a function that fetches data from an API and updates the state based on that data. However, the UI does not reflect the changes after the data is fetched. Here's a simplified version of my code: ```dart class DataFetcher extends StatefulWidget { @override _DataFetcherState createState() => _DataFetcherState(); } class _DataFetcherState extends State<DataFetcher> { List<String> _data = []; bool _isLoading = true; @override void initState() { super.initState(); _fetchData(); } Future<void> _fetchData() async { try { final response = await http.get(Uri.parse('https://api.example.com/data')); if (response.statusCode == 200) { setState(() { _data = json.decode(response.body); _isLoading = false; }); } else { throw Exception('Failed to load data'); } } catch (e) { print(e); setState(() { _isLoading = false; }); } } @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar(title: Text('Data Fetcher')), body: _isLoading ? CircularProgressIndicator() : ListView.builder( itemCount: _data.length, itemBuilder: (context, index) { return ListTile(title: Text(_data[index])); }, ), ); } } ``` The `_fetchData()` is called in `initState()`, and I expect the UI to show the list of data once it’s loaded. However, I see the `CircularProgressIndicator`, and after fetching, the list doesn’t appear unless I manually refresh the widget. I’ve checked for any issues with the API, but the data is being fetched correctly since I can see it in the console. I've also tried wrapping the `setState` calls in `if (mounted) { ... }` checks, but that didn't change the behavior. Is there something I'm missing here regarding state management or rendering in Flutter? Any insight would be appreciated! I'm working on a API that needs to handle this. How would you solve this? My development environment is Ubuntu. What's the best practice here? My development environment is Linux. How would you solve this? Thanks for any help you can provide!