onclose of dialog reload screen flutter
Return true in pop Navigator from the dialog when want to refresh the screen
FlatButton(
    onPressed: () => Navigator.of(context).pop(true),
    child: Text("Close")),
    ...
    ...
)  
Refresh screen when getting true in result
final result = await showDialog<bool>(
  context: context,
  builder: (context) => MyDialog(),
);
if (result) {
	// refresh screen
    setState(() {});
}
