Updating readme.md

example/main.dart

@@ -0,0 +1,53 @@
+import 'package:date_field/date_field.dart';
+import 'package:flutter/material.dart';
+
+void main() {
+  WidgetsFlutterBinding.ensureInitialized();
+
+  runApp(ExampleApp());
+}
+
+class ExampleApp extends StatelessWidget {
+
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'Example app',
+      home: HomeWidget()
+    );
+  }
+}
+
+
+class HomeWidget extends StatefulWidget {
+  @override
+  _HomeWidgetState createState() => _HomeWidgetState();
+}
+
+class _HomeWidgetState extends State<HomeWidget> {
+  DateTime selectedDate;
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: Column(
+        children: <Widget>[
+          Column(
+            children: <Widget>[
+              DateField(
+                selectedDate: selectedDate,
+                onDateSelected: (DateTime date) {
+                  setState(() {
+                    selectedDate = date;
+                  });
+                },
+                lastDate: DateTime(2020),
+              ),
+            ],
+          ),
+        ],
+      ),
+    );
+  }
+}