Dropdown selection not displaying with Flutter

Question

I\' m gettings items from JSON and displaying them in a dropdown. When the person select an item from the dropdown list, I get the selection but the selected item doesn\'t c

Answer 1

Is used this code in my most recent app and it works. Maybe you could compare it to your code.

return DropdownButton(
    style: Theme.of(context).textTheme.title,
    items: _persons.map((String val) {
      return new DropdownMenuItem(
        value: val,
        child: new Container(
          child: new Card(
            child: new Row(children: [
              new Icon(Icons.person),
              new Text(val),
            ]),
          ),
        ),
      );
    }).toList(),
    hint: new Card(
        child: new Row(children: [
      new Icon(Icons.person),
      new Text("check"),
    ])),
    value: _selectedPerson,
    onChanged: (newVal) {
      _selectedPerson = newVal;
      setState(() {});
    });