Full Screenshot in Webview flutter

 import 'dart:convert';

import 'dart:io';
import 'dart:typed_data';

import 'package:flutter/material.dart';
import 'package:flutter_inappwebview/flutter_inappwebview.dart';
import 'package:path_provider/path_provider.dart';

class InAppWebViewExampleScreen extends StatefulWidget {
  @override
  _InAppWebViewExampleScreenState createState() =>
      new _InAppWebViewExampleScreenState();
}

class _InAppWebViewExampleScreenState extends State<InAppWebViewExampleScreen> {
  late InAppWebViewController webView;
  late Uint8List screenshotBytes;

  @override
  void initState() {
    super.initState();
  }

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(title: Text("InAppWebView")),
        body: Container(
            child: Column(children: <Widget>[
          Expanded(
              child: InAppWebView(
            initialUrlRequest:
                URLRequest(url: WebUri("https://github.com/flutter")),
            onWebViewCreated: (InAppWebViewController controller) {
              webView = controller;
            },
            onLoadStart: (InAppWebViewController controller, WebUri? url) {},
            onLoadStop: (InAppWebViewController controller, WebUri? url) async {
              try {
                var canvasHeight = await controller.evaluateJavascript(
                    source:
                        "Math.max(document.documentElement.scrollHeight, document.body.scrollHeight);");
                await controller.setOptions(
                    options: InAppWebViewGroupOptions(
                  crossPlatform: InAppWebViewOptions(
                    useShouldOverrideUrlLoading: true,
                    mediaPlaybackRequiresUserGesture: false,
                  ),
                  android: AndroidInAppWebViewOptions(
                    useHybridComposition: true,
                  ),
                ));
                screenshotBytes = (await controller.takeScreenshot(
                    screenshotConfiguration: ScreenshotConfiguration(
                  compressFormat: CompressFormat.PNG,
                  //androidHeight: int.parse(canvasHeight.toString())
                )))!;
                showDialog(
                  context: context,
                  builder: (context) {
                    return AlertDialog(
                      content: SingleChildScrollView(
                        child: Image.memory(screenshotBytes),
                      ),
                    );
                  },
                );
              } catch (e) {
                print("Screenshot error: $e");
              }
            },
          ))
        ])));
  }
}


class FullPageScreenshot extends StatefulWidget {
  @override
  _FullPageScreenshotState createState() => _FullPageScreenshotState();
}

class _FullPageScreenshotState extends State<FullPageScreenshot> {
  late InAppWebViewController webViewController;

  Future<void> _takeFullPageScreenshot() async {
    try {
      // Take screenshot of visible area only
      Uint8List? imageBytes = await webViewController.takeScreenshot(
        screenshotConfiguration: ScreenshotConfiguration(
          compressFormat: CompressFormat.PNG,
        ),
      );

      if (imageBytes != null) {
        final directory = await getApplicationDocumentsDirectory();
        File imgFile = File('${directory.path}/screenshot.png');
        await imgFile.writeAsBytes(imageBytes);
        print('Screenshot saved to ${imgFile.path}');
        ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Screenshot saved!')));
      }
    } catch (e) {
      print("Screenshot error: $e");
      ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Failed to take screenshot')));
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Full Page Screenshot'),
        actions: [
          IconButton(
            icon: Icon(Icons.camera),
            onPressed: _takeFullPageScreenshot,
          ),
        ],
      ),
      body: InAppWebView(
        initialUrlRequest: URLRequest(url: WebUri('https://upsoftech.com/biodata/public/templates/temp.html')),
        onWebViewCreated: (controller) {
          webViewController = controller;
        },
        // Add more configuration if needed
      ),
    );
  }
}