Getting value from form with date picker - flutter

Question

I'm having trouble setting the state to get the value from textfield with a date picker.
How do you return the value in the text field if the date picked is between start and end. I set pressed initially to false and when it's press it becomes true which will return the value from the text field.
import 'package:flutter/material.dart';
void main() => runApp(MaterialApp(
home: MyApp(),
));
class MyApp extends StatefulWidget {
#override
MyAppState createState() {
return new MyAppState();
}
}
class MyAppState extends State<MyApp> {
bool pressed = false;
final myController = TextEditingController();
DateTime selectedDate = DateTime.now();
Future<Null> _selectDate(BuildContext context) async {
final DateTime picked = await showDatePicker(
context: context,
initialDate: selectedDate,
firstDate: DateTime(2015, 8),
lastDate: DateTime(2101));
if (picked != null && picked != selectedDate)
setState(() {
selectedDate = picked;
});
}
#override
void dispose() {
// Clean up the controller when the widget is disposed.
myController.dispose();
super.dispose();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('First Route'),
),
body: Column(
children: <Widget>[
TextField(
controller: myController,
decoration: new InputDecoration(labelText: "Enter a number"),
keyboardType: TextInputType.number,
),
SizedBox(
height: 50.0,
),
RaisedButton(
onPressed: () => _selectDate(context),
child: Text('Select date'),
),
RaisedButton(
child: Text("show text"),
onPressed: () {
DateTime start = DateTime(2019, 01, 01);
final end = DateTime(2022, 12, 31);
if (selectedDate.isAfter(start) && selectedDate.isBefore(end)) {
return pressed = true;
} else {
return pressed = false;
}
},
),
pressed ? Text(myController.text) : Text('no'),
],
),
);
}
}

Answer 1

final myController = TextEditingController();
DateTime selectedDate = DateTime.now();
Future<Null> _selectDate(BuildContext context) async {
final DateTime picked = await showDatePicker(
context: context,
initialDate: selectedDate,
firstDate: DateTime(2015, 8),
lastDate: DateTime(2101));
if (picked != null && picked != selectedDate)
setState(() {
selectedDate = picked;
myController.text = selectedDate.toString();
});
}