keyboard on change listener say visibilty true but height of keyboard still zero

[eggyot]

when keyboardvisibilty detect onchange and say visible is true but when I tried to get height of keyboard is still 0, so I must add delay timer for make sure keyboard is show up and then get the height is not zero again. how to know if keyboard is really show up without timer?

keyboardVisibilityController.onChange.listen((bool visible) {
  print('Keyboard visibility update. Is visible: $visible');
  if(visible){
    Timer(const Duration(seconds: 1), () async {
      print(MediaQuery.of(context).viewInsets.bottom);
    });
  }
});