Dropdownbutton restrict shown items - flutter

Question

Ive got the following Problem:
I want the user to choose a day of month with a dropdownbutton. So my items are the numbers 1 to 31. Now the list got pretty long and the Dropdownbutton is really large. Is there a Solution to show e.g. only 5 Elements at the same time?
Widget buildDropdownMonthlyTurnus() {
return DropdownButton<int>(
value: _selectedDay,
icon: Icon(Icons.arrow_downward),
iconSize: 24,
elevation: 16,
style: TextStyle(color: Colors.blue),
underline: Container(
height: 2,
color: Colors.blue,
),
onChanged: (int newValue) {
setState(() {
_selectedDay = newValue;
});
},
items: Constants.daysOfMonth.map((int value) {
return new DropdownMenuItem<int>(
value: value,
child: new Text(
value.toString(),
style: new TextStyle(color: Colors.black),
),
);
}).toList());
}
In the link you see my problem with the large list.
enter image description here

Answer 1

For this problem you can use listview, inside a container and show manage its size according to the list items shown, you don't need to use dropdown items at all.

Answer 2

Use the menuMaxHeight property of the DropdownButton class. It's a recent addition to control the height of the menu.
Widget buildDropdownMonthlyTurnus() {
return DropdownButton<int>(
menuMaxHeight: 200.0,
value: _selectedDay,
icon: Icon(Icons.arrow_downward),
iconSize: 24,
elevation: 16,
style: TextStyle(color: Colors.blue),
underline: Container(
height: 2,
color: Colors.blue,
),
onChanged: (int newValue) {
setState(() {
_selectedDay = newValue;
});
},
items: Constants.daysOfMonth.map((int value) {
return new DropdownMenuItem<int>(
value: value,
child: new Text(
value.toString(),
style: new TextStyle(color: Colors.black),
),
);
}).toList());