how to custom showmodalbottomsheet in flutter site:stackoverflow.com
void _modalBottomSheetMenu(){
showModalBottomSheet(
context: context,
builder: (builder){
return new Container(
height: 350.0,
color: Colors.transparent, //could change this to Color(0xFF737373),
//so you don't have to change MaterialApp canvasColor
child: new Container(
decoration: new BoxDecoration(
color: Colors.white,
borderRadius: new BorderRadius.only(
topLeft: const Radius.circular(10.0),
topRight: const Radius.circular(10.0))),
child: new Center(
child: new Text("This is a modal sheet"),
)),
);
}
);
}