set listview builder key using itembuilder index flutter code example

Example 1: flutter listview builder

List<String> litems = ["1","2","Third","4"];
body: new ListView.builder
  (
    itemCount: litems.length,
    itemBuilder: (BuildContext ctxt, int index) {
     return new Text(litems[index]);
    }
  )

Example 2: listview flutter

Widget _myListView(BuildContext context) {
      return ListView(
        children: <Widget>[
          ListTile(
            title: Text('Sun'),
          ),
          ListTile(
            title: Text('Moon'),
          ),
          ListTile(
            title: Text('Star'),
          ),
        ],
      );
    }