Previous screen time is not updating in flutter

Question

I'm using stateless Widget in my application. By using this single line I can get the output.

  DateFormat('HH:mma').format(now).

1.problem is when screen is moving to another screen and back to previous screen at that time time which I have implemented is not updating. 2. time is not updating when I do not touch the screen. and its updating once I touched the screen.

Is there any possibilities to overcome this behavior.

Thanks in advance.

Answer 1

If you want a widget that for example refreshes every second, you could use a StreamBuilder. For example

Widget build(BuildContext context) {
  return StreamBuilder(
    stream:
        Stream.periodic(const Duration(seconds: 1)),
    builder: (context, snapshot) =>
        Text(DateFormat('HH:mm:ssa').format(DateTime.now())),
  );
}