flutter fab covers widget on keyboard open

1final bool showFab = MediaQuery.of(context).viewInsets.bottom==0.0;
2
3//then use Visibility widget to wrap the FAB and set visible attribute to showFab
4buildAcitonButton(){
5	return Visibility(
6      visible: _showFab,
7      child: RaisedButton(
8        child: ...
9      ),
10    );
11}