OnTap后刷新Flutter ListView

Question

I want to change the view of a selected item (_itemSelected) . It works when I select an item but the other items doesn't refresh. There is something like notifydatasetchanged? Something I missed? Thanks!

class MyItemListItem extends State<MyItemList> {
  final MyItem item;

  MyItemListItem(this.item);

  @override
  Widget build(BuildContext context) {
    return new ListTile(
        key: _itemListItem,
        onTap: () {
          _scaffoldKey.currentState.showSnackBar(new SnackBar(
              content: new Text("You clicked item number " + item.name)));
          _itemSelected = item;

          setState(() {

          });
        },
        leading: new CircleAvatar(backgroundColor: Colors.blue),
        title: _itemSelected != null && item == _itemSelected
            ? new Row(children: <Widget>[new Text("Foo"), new Text("Bar")])
            : new Row(
                children: <Widget>[
                  new Expanded(child: new Text(item.name)),
                ],
              ));
  }
}

Answer 1

Ok, I figured out the problem. Like Günter Zöchbauer suggested I added

_scaffoldKey.currentState.showSnackBar(new SnackBar(
              content: new Text("You clicked item number " + item.name)));
          _itemSelected = item;

          home.addItem();

        },

where home is the parent widget.

void addItem() {
    setState(() {

    });
  }