How to open to new schema?

[tankchuen]

I use addthis plugin inside webview, when click share to social media will hit net:ERR_UNKNOWN_URL_SCHEME

i'm add these to my code still not working

initialOptions: {
     'resourceCustomSchemes': ["fb-messenger","tg","whatsapp"]
}

Is any where can fixed this? Thank you

[pichillilorenzo]

resourceCustomSchemes option is used by the onLoadResourceCustomScheme event to intercept resource requests with custom scheme. For example in your html you have something like this:

 <img src="my-special-custom-scheme://images/flutter-logo.svg" alt="flutter logo">

So, in the initialOptions you would have:

initialOptions: InAppWebViewWidgetOptions(
    inAppWebViewOptions: InAppWebViewOptions(
        resourceCustomSchemes: ["my-special-custom-scheme"],
    )
)       

and the event handler could be something like this:

onLoadResourceCustomScheme: (InAppWebViewController controller, String scheme, String url) async {
  if (scheme == "my-special-custom-scheme") {
    var bytes = await rootBundle.load("assets/" + url.replaceFirst("my-special-custom-scheme://", "", 0));
    var response = new CustomSchemeResponse(bytes.buffer.asUint8List(), "image/svg+xml", contentEnconding: "utf-8");
    return response;
  }
  return null;
},

Instead, in your case you want to handle custom schemes that are not about resources like images, etc. So, in this case, you need to set the InAppWebViewOptions.useShouldOverrideUrlLoading option to true and to use shouldOverrideUrlLoading event:

shouldOverrideUrlLoading: (InAppWebViewController controller, String url) {
  if (url.startsWith("whatsapp://")) {
    // Open WhatsApp app
  } else if (url.startsWith("foo://")) {
    // check for other apps ...
  }
},

If you want to open an app like WhatsApp, you can use my other plugin flutter_appavailability.

However, you are using the 2.0 flutter_inappbrowser version that is not published yet. I need to finish the new documentation and create at least some tests before publishing it. Of course, you can use it at your own risk for now.

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