updated example

example/lib/main.dart

@@ -1,63 +1,76 @@
 import 'package:flutter/material.dart';
-import 'dart:async';
-
-import 'package:flutter/services.dart';
 import 'package:keyboard_height_plugin/keyboard_height_plugin.dart';
 
 void main() {
-  runApp(const MyApp());
+  runApp(MyApp());
 }
 
-class MyApp extends StatefulWidget {
-  const MyApp({super.key});
-
+class MyApp extends StatelessWidget {
   @override
-  State<MyApp> createState() => _MyAppState();
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      home: HomePage(),
+    );
+  }
 }
 
-class _MyAppState extends State<MyApp> {
-  String _platformVersion = 'Unknown';
-  final _keyboardHeightPlugin = KeyboardHeightPlugin();
+class HomePage extends StatefulWidget {
+  @override
+  _HomePageState createState() => _HomePageState();
+}
+
+class _HomePageState extends State<HomePage> {
+  double _keyboardHeight = 0;
+  final KeyboardHeightPlugin _keyboardHeightPlugin = KeyboardHeightPlugin();
 
   @override
   void initState() {
     super.initState();
-    initPlatformState();
-  }
-
-  // Platform messages are asynchronous, so we initialize in an async method.
-  Future<void> initPlatformState() async {
-    String platformVersion;
-    // Platform messages may fail, so we use a try/catch PlatformException.
-    // We also handle the message potentially returning null.
-    try {
-      platformVersion =
-          await _keyboardHeightPlugin.getPlatformVersion() ?? 'Unknown platform version';
-    } on PlatformException {
-      platformVersion = 'Failed to get platform version.';
-    }
-
-    // If the widget was removed from the tree while the asynchronous platform
-    // message was in flight, we want to discard the reply rather than calling
-    // setState to update our non-existent appearance.
-    if (!mounted) return;
-
-    setState(() {
-      _platformVersion = platformVersion;
+    _keyboardHeightPlugin.onKeyboardHeightChanged((double height) {
+      setState(() {
+        _keyboardHeight = height;
+      });
     });
   }
 
   @override
-  Widget build(BuildContext context) {
-    return MaterialApp(
-      home: Scaffold(
+    Widget build(BuildContext context) {
+      return Scaffold(
+        resizeToAvoidBottomInset: false,
         appBar: AppBar(
-          title: const Text('Plugin example app'),
+          title: Text('Keyboard Height'),
         ),
         body: Center(
-          child: Text('Running on: $_platformVersion\n'),
+            child: Stack(
+              children: [
+                Column(
+                  mainAxisAlignment: MainAxisAlignment.center,
+                  children: <Widget>[
+                    Text(
+                      'Keyboard height: $_keyboardHeight',
+                    ),
+                    SizedBox(height: 16),
+                    ElevatedButton(
+                      child: Text('Get Keyboard Height'),
+                      onPressed: () => {},
+                    ),
+                  ],
+                ),
+                Positioned(
+                  bottom: _keyboardHeight,
+                  left: 0,
+                  right: 0,
+                  child: TextField(
+                    decoration: InputDecoration(
+                    filled: true,
+                    fillColor: Colors.orange,
+                      hintText: 'Type here to open keyboard',
+                    ),
+                  ),
+                ),
+              ],
+          ),
         ),
-      ),
-    );
-  }
+      );
+    }
 }