How to Handle (Tel:,Mailto:,Wa:,Sms:) In Inappwebview?

[dickynh2292]

excuse me sir, permission to ask,
I'm just learning flutter and am trying to make an application using package _inappwebview & url_launcher,
Well, I'm having trouble trying to handle mailto, tel, etc.

Now when the link is clicked (eg href=tel:), it does exit the application but why does it go to the chrome browser (opens the webview url) instead of going to the phone.
Can anyone help me to tell where is my error?

My full code example can be seen here:

import 'dart:async';
import 'dart:collection';
import 'dart:convert';
import 'dart:io';
import 'dart:typed_data';
import 'package:flutter/services.dart';
import 'package:flutter/material.dart';
import 'package:flutter_inappwebview/flutter_inappwebview.dart';
import 'package:url_launcher/url_launcher.dart';
import 'package:flutter_downloader/flutter_downloader.dart';
import 'package:permission_handler/permission_handler.dart';

void main() async {
  SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle(
    statusBarColor: Colors.white, // status bar color
    statusBarIconBrightness: Brightness.dark, // status bar icon color
    systemNavigationBarColor: Colors.white, // navigation bar color
    systemNavigationBarIconBrightness: Brightness.dark, // color of navigation controls
  ));
  WidgetsFlutterBinding.ensureInitialized();
  await Permission.camera.request();
  await Permission.microphone.request();
  await Permission.storage.request();
  await AndroidInAppWebViewController.setWebContentsDebuggingEnabled(true);
  await FlutterDownloader.initialize(debug: true);
  runApp(MaterialApp(home: MyApp()));
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => new _MyAppState();
}

class _MyAppState extends State<MyApp> {
  late InAppWebViewController webViewController;
  GlobalKey<ScaffoldState>webViewKey=GlobalKey<ScaffoldState>();

  InAppWebViewGroupOptions options = InAppWebViewGroupOptions(
      crossPlatform: InAppWebViewOptions(
        useShouldOverrideUrlLoading: true,
        mediaPlaybackRequiresUserGesture: false,
        javaScriptEnabled: true,
        javaScriptCanOpenWindowsAutomatically: true,
        useOnDownloadStart: true,
      ),
      android: AndroidInAppWebViewOptions(
        useHybridComposition: true,
      ),
      ios: IOSInAppWebViewOptions(
        allowsInlineMediaPlayback: true,
      )
  );

  late PullToRefreshController pullToRefreshController;
  String url = "";
  double progress = 0;
  final urlController = TextEditingController();

  @override
  void initState() {
    super.initState();
    pullToRefreshController = PullToRefreshController(
      options: PullToRefreshOptions(
        color: Colors.red,
      ),
      onRefresh: () async {
        if (Platform.isAndroid) {
          webViewController.reload();
        } else if (Platform.isIOS) {
          webViewController.loadUrl(
              urlRequest: URLRequest(url: await webViewController.getUrl()));
        }
      },
    );
  }

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

  @override
  Widget build(BuildContext context) {
    return WillPopScope(
      onWillPop: _onBack,
      child: Scaffold(
          key: webViewKey,
          appBar: null,
          body: SafeArea(
              child: Column(children: <Widget>[
                Expanded(
                  child: Stack(
                    children: [
                      InAppWebView(
                        initialUrlRequest: URLRequest(url: Uri.parse("https://ummmah.com/")),
                        initialOptions: options,
                        pullToRefreshController: pullToRefreshController,
                        onWebViewCreated: (controller) {
                          webViewController = controller;
                        },
                        onLoadStart: (controller, url) {
                          setState(() {
                            this.url = url.toString();
                            urlController.text = this.url;
                          });
                        },
                        androidOnPermissionRequest: (controller, origin, resources) async {
                          return PermissionRequestResponse(
                              resources: resources,
                              action: PermissionRequestResponseAction.GRANT);
                        },
                        shouldOverrideUrlLoading: (controller, shouldOverrideUrlLoadingRequest) async {
                          var uri = shouldOverrideUrlLoadingRequest.request.url!;
                          if (uri.scheme.startsWith("tel")) {
                            if (await canLaunch(url)) {
                              await launch(
                                url,
                              );
                              return NavigationActionPolicy.CANCEL;
                            }
                          }
                          return NavigationActionPolicy.ALLOW;
                        },
                        onLoadStop: (controller, url) async {
                          pullToRefreshController.endRefreshing();
                          setState(() {
                            this.url = url.toString();
                            urlController.text = this.url;
                          });
                        },
                        onLoadError: (controller, url, code, message) {
                          pullToRefreshController.endRefreshing();
                        },
                        onProgressChanged: (controller, progress) {
                          if (progress == 100) {
                            pullToRefreshController.endRefreshing();
                          }
                          setState(() {
                            this.progress = progress / 100;
                            urlController.text = this.url;
                          });
                        },
                        onUpdateVisitedHistory: (controller, url, androidIsReload) {
                          setState(() {
                            this.url = url.toString();
                            urlController.text = this.url;
                          });
                        },
                        onConsoleMessage: (controller, consoleMessage) {
                          print(consoleMessage);
                        },
                      ),
                      progress < 1.0
                          ? LinearProgressIndicator(
                              value: progress,
                              minHeight: 2,
                          )
                          : Container(),
                    ],
                  ),
                ),
              ]
              )
          )
      ),
    );
  }
  Future<bool> _onBack() async {
    bool goBack;
    if (await webViewController.canGoBack()) {
      webViewController.goBack();
      return false;
    } else {
      showDialog(
          context: context,
          builder: (context) => AlertDialog(
            title: Text('Kamu yakin ingin keluar ?'),
            actions: <Widget>[
              FlatButton(
                onPressed: () {
                  Navigator.of(context).pop();
                },
                child: Text('Tidak'),
              ),
              FlatButton(
                onPressed: () {
                  SystemNavigator.pop();
                },
                child: Text('Iya'),
              ),
            ],
          ));
      return Future.value(true);
    }
  }
}

[omanrai]

body: InAppWebView(
initialUrlRequest: URLRequest(url: Uri.parse("YOUR_INITIAL_URL")),
initialOptions: InAppWebViewGroupOptions(
crossPlatform: InAppWebViewOptions(
javaScriptEnabled: true,
// Other options...
),
),
onWebViewCreated: (controller) {
webView = controller;
},
onLoadStart: (controller, url) async {
// Handle loading start event
print("WebView is starting to load: $url");
},
shouldOverrideUrlLoading: (controller, navigationAction) async {
var uri = navigationAction.request.url!;

      // Check if the URL is for Gmail
      if (uri.host.contains('mail.google.com')) {
        // Open Gmail URL in the WebView
        return NavigationActionPolicy.ALLOW;
      }
      // Check if the URL is for Facebook
      else if (uri.host.contains('facebook.com')) {
        // Open Facebook URL in the WebView
        return NavigationActionPolicy.ALLOW;
      }


      // For any other URLs like tel, allow them to load in the WebView
      return NavigationActionPolicy.ALLOW;
    },
  ),

[techwithsam]

Thank you @omanrai