Flutter : How to refresh screen when user come back to it from any other screen

Question

For ex.

I am on Screen-1 , push screen and goto Screen-2.
and then I replace Screen-2 with Screen-3
and now I pop that Screen-3 with pass some data
and come back to Screen-1 and I want refresh data in Screen-1

Answer 1

You can use something like this (but you must go from 3 to 2 and finally 1) to get some value then refresh it:

var result = await Navigator.of(context).push(
            MaterialPageRoute(builder: (context) => Screen2()));
        if (result != null) {
          setState(() {
            valueYouChangeIt = result;
          });
        }

And then send this value back from Screen2 with:

_sendDataBack(BuildContext context) {
    Navigator.pop(context, valueToSendBack);
  }

Or if you want to refresh everything you can write _initState function where you initialize your data and then call _initState on result.

Said that, all this can be super tedious process, so if it's a small app with 2 to 5 screens it can be ok, but with more screens, like someone else commented, I'd prefer to use Provider.