Flutter

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For Flutter usage scenario, using the inappwebview is recommended.

After creating the transaction and getting the transaction link, the following implementation is recommended:

• In your common flow (which IDPay is inserted) you will open the inappwebview with the link generated through the API;

• Customize this opening in any way that is ideal for your application;

• Monitor if the URL has changed (to redirectUrl) and then close the inappwebview;

The following code shows how to open an inappwebview and handle the URL change:

  import 'package:flutter_inappwebview/flutter_inappwebview.dart';  
  import 'package:unico_poc_id_pay_inappwebview/RedirectScreen.dart';
  import 'package:unico_poc_id_pay_inappwebview/service.dart';

  Widget setWebView(String URL_TO_LOAD) {
    InAppWebViewGroupOptions options = InAppWebViewGroupOptions(
        crossPlatform: InAppWebViewOptions(
          useShouldOverrideUrlLoading: true,
          mediaPlaybackRequiresUserGesture: false,
        ),
        android: AndroidInAppWebViewOptions(
          useHybridComposition: true,
        ),
        ios: IOSInAppWebViewOptions(
          allowsInlineMediaPlayback: true,
        ));

    return Expanded(
      child: InAppWebView(
        initialUrlRequest: URLRequest(
          url: Uri.parse(URL_TO_LOAD),
        ),
        initialOptions: options,
        androidOnPermissionRequest: (controller, origin, resources) async {
          return PermissionRequestResponse(
              resources: resources,
              action: PermissionRequestResponseAction.GRANT);
        },
        onWebViewCreated: (controller) {
          setState(() {
            _inAppWebViewController = controller;
          });
        },
        onLoadStart: (controller, url) {
          print('CARREGANDO');
          setState(() {
            _link = url.toString();
          });
        },
        onProgressChanged: (controller, progress) {
          setState(() {
            progress == 100 ? _isLoading = false : _isLoading = true;
          });
        },
        onLoadStop: (controller, url) {
          print('CARREGADO');
          setState(() {
            _link = url.toString();
          });
        },
        shouldOverrideUrlLoading: (controller, navigationAction) async {
          var uri = navigationAction.request.url;
          if (uri == Uri.parse("<URL_TO_OBSERVER>")) {
            setState(() {
              _link = "";
            });

            Navigator.push(
              context,
              MaterialPageRoute(
                builder: (context) => const RedirectSreen(),
              ),
            );
            return NavigationActionPolicy.CANCEL;
          }
          return NavigationActionPolicy.ALLOW;
        },
      ),
    );
  }

The following code shows how to get the camera permission:

  import 'package:permission_handler/permission_handler.dart';

  void requestPermission() async {
    var status = await Permission.camera.status;
    if (status.isDenied) {
      if (await Permission.camera.request().isGranted) {
        print("ok");
      }
    }
  }

Follows an example of how it should look in the APP:

The following permissions are required to function correctly:

• Camera;

• Geolocation.

To know more about the inappwebview, the following articles and documentation are recommended:

• Access the official documentation at flutter_inappwebview.

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