In flutter, Check if virtual keyboard is open

main.dart

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  bool isKeyboardOpen = false;

  @override
  Widget build(BuildContext context) {
    MediaQueryData queryData = MediaQuery.of(context);
    isKeyboardOpen = queryData.viewInsets.bottom > 0;

    return Scaffold(
      appBar: AppBar(
        title: Text('Keyboard Status'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            TextField(
              decoration: InputDecoration(labelText: 'Type here'),
            ),
            SizedBox(height: 20),
            Text('Is Keyboard Open: $isKeyboardOpen'),
          ],
        ),
      ),
    );
  }
}