CODE EXAMPLE FOR TYPESCRIPT

flutter fab covers widget on keyboard open

final bool showFab = MediaQuery.of(context).viewInsets.bottom==0.0;

//then use Visibility widget to wrap the FAB and set visible attribute to showFab
buildAcitonButton(){
	return Visibility(
      visible: _showFab,
      child: RaisedButton(
        child: ...
      ),
    );
}