Flutter: Select Time and Date from one button - date

Question

I have two separate buttons, one to select a date and one to select a time. How am I able to select both the date and then time by only having a single button?
For example, one the click of a "Schedule" button, a Datepicker will popup. Once the user selects a date and clicks "OK" in the Datepicker, the Timepicker will be called or popup.
This is the code for my time and date button widgets:
DateTime _date = new DateTime.now();
TimeOfDay _time = new TimeOfDay.now();
Future<Null> _selectDate(BuildContext context) async {
final DateTime picked = await showDatePicker(
context: context,
initialDate: _date,
firstDate: new DateTime(2019),
lastDate: new DateTime(2021),
);
if(picked != null && picked != _date) {
print('Date selected: ${_date.toString()}');
setState((){
_date = picked;
});
}
}
Future<Null> _selectTime(BuildContext context) async {
final TimeOfDay picked = await showTimePicker(
context: context,
initialTime: _time,
);
if(picked != null && picked != _time) {
print('Time selected: ${_time.toString()}');
setState((){
_time = picked;
});
}
}
Widgets:
final buttonRow = new Wrap(children: <Widget>[
new RaisedButton(
child: new Text('Select Date'),
onPressed: (){_selectDate(context);}
),
new RaisedButton(
child: new Text('Select Time'),
onPressed: (){_selectTime(context);}
)
]);

Answer 1

RaisedButton(
child: new Text('Select Date and Time'),
onPressed: (){ _selectDateAndTime(context); }
)
/* ... */
Future<Null> _selectDateAndTime(BuildContext context) async {
await _selectDate(context);
await _selectTime(context);
}