issue_70577.dart

import 'dart:async';
import 'package:flutter/material.dart';
import 'package:camera/camera.dart';
import 'package:webview_flutter/webview_flutter.dart';

List<CameraDescription> cameras;

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  cameras = await availableCameras();
  runApp(CameraApp());
}

class CameraApp extends StatefulWidget {
  @override
  _CameraAppState createState() => _CameraAppState();
}

class _CameraAppState extends State<CameraApp> {
  CameraController controller;

  @override
  void initState() {
    super.initState();
    controller = CameraController(cameras[0], ResolutionPreset.medium);
    controller.initialize().then((_) {
      if (!mounted) {
        return;
      }
      setState(() {});
    });
  }

  @override
  void dispose() {
    controller?.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    if (!controller.value.isInitialized) {
      return Container();
    }
    return Directionality(
      textDirection: TextDirection.ltr,
      child: Column(
        children: [
          AspectRatio(
            aspectRatio: controller.value.aspectRatio,
            child: CameraPreview(controller),
          ),
          GoogleView(),
        ],
      ),
    );
  }
}

class GoogleView extends StatefulWidget {
  @override
  _GoogleViewState createState() => _GoogleViewState();
}

class _GoogleViewState extends State<GoogleView> {
  final Completer<WebViewController> _controller =
      Completer<WebViewController>();

  @override
  Widget build(BuildContext context) {
    return Container(
      width: 300,
      height: 300,
      child: WebView(
        initialUrl: 'https://flutter.dev',
        javascriptMode: JavascriptMode.unrestricted,
        onWebViewCreated: (WebViewController webViewController) {
          _controller.complete(webViewController);
        },
      ),
    );
  }
}