Fix memory leak when listening on channel/websocket | flutter | django

Add this line of code inside your stream listen function, under initState.

if (!mounted) {
  return;
}

  @override
  void initState() {
    Provider.of(context, listen: false)
        .websocketChatConnectToRoom('room1');
    channel = Provider.of(context, listen: false).channel!;

    channel!.stream.listen((str) {
      if (!mounted) {
        return;
      }
      if (str != '') {
        dynamic decodedData = json.decode(str);
        chatData.add(ChatItem(
          userId: decodedData['Account'].toString(),
          dateTime: DateTime.parse(decodedData['datetime']),
          message: decodedData['message'],
          image: '',
          fromName: decodedData['from_name'],
        ));
        setState(() {});
      }
    });
    super.initState();
  }