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

For those who are facing this problem in future. Use variable to set the value to DropdownButton and when the onChanged called update the variable using setState

Expanded(child: DropdownButton(
          items: cities.map((String value) {
            return DropdownMenuItem(
              value: value,
              child: Text(value),
            );
          }).toList(),
          value: city,
          onChanged: (String val) {
            _onDropDownChanged(val);
          },
        ),)

update the city variable by using state

void _onDropDownChanged(String val) {
    setState(() {
      this.city = val;
    });
  }

For further information check the link below

https://github.com/FazalHussain/Flutter-Demo/blob/trip_cost_app/lib/main.dart