init

lib/keyboard_height_plugin.dart

@@ -0,0 +1,28 @@
+import 'dart:async';
+import 'package:flutter/services.dart';
+
+typedef KeyboardHeightCallback = void Function(double height);
+
+class KeyboardHeightPlugin {
+    static const EventChannel _keyboardHeightEventChannel = const EventChannel('keyboardHeightEventChannel');
+
+    StreamSubscription? _keyboardHeightSubscription;
+
+
+    void onKeyboardHeightChanged(KeyboardHeightCallback callback) {
+        if (_keyboardHeightSubscription != null) {
+            _keyboardHeightSubscription!.cancel();
+        }
+        _keyboardHeightSubscription = _keyboardHeightEventChannel
+        .receiveBroadcastStream()
+        .listen((dynamic height) {
+            callback(height as double);
+        });
+    }
+
+    void dispose() {
+        if (_keyboardHeightSubscription != null) {
+            _keyboardHeightSubscription!.cancel();
+        }
+    }
+}