JsBridge | android java and javascript bridge

Recently I've had the assignment to create a bi-directional interop bridge between a shell app and a webpage in .NET MAUI. Not finding any way to solve this I had the idea of creating it in Xamarin.Forms first seeing as MAUI is a continuation on it.

After having created this app, I've tried to convert it over to MAUI using Microsoft's instructions on the dotnet/maui github wiki.

The main problem i'm encountering right now is that I've been using extensions on Android's WebViewRenderer, WebViewClient and Java.Lang.Object to be able to send and receive javascript to and from the WebView.

Upcalls from JavaScript to JavaFX works fine. But if I add a variable containing the VLCJ player implementation then everything stops working.

Main.java:

I'm using a webview in xamarin, i followed many tutorials to handle navigation, and all works fine. My issue is : when an anchor tag has a target="_blank" the event Navigating is never fired.

I see arround someone give a javascript solution which remove target=_blank and attach it at the end of href link.

Is really that the right way to do that? Look wired..

Thank you

This is initialization in xamarin.android renderer

I am trying to set a view for a lookup field in Resco using JSBridge But the code does not work. Can you please point out where i am going wrong.

Below is my code --

I will try and explain everything to the best of my ability, but I am new to using Xamarin so please bear with me while I try to give you an understanding of my situation.

I am using Xamarin Forms to build an Android application, I already have a desktop application that uses Electron so I have lots of pre-built user interface in HTML which I am using in a HybridWebView for the interface and JSBridge to call the C# code.

My application will only be installed on a clients network of devices, and we have set up a foreground service, that has a service notification to keep the background jobs running; this is all working as intended.

Calling C# code from the HTML interface is easy enough using the JSBridge / HybridWebView, however, I am unable to find a way that allows my C# functions inside the JSBridge class to talk to my foreground service which has already been started by the MainActivity, this service runs background jobs that return data that my UI will need access to.

My Service is being started in the MainActivity OnCreate like so:

I followed the post to create a custon WebView to interact with client JavaScript: https://docs.microsoft.com/es-es/xamarin/xamarin-forms/app-fundamentals/custom-renderer/hybridwebview

But when I try to load a page, for example https://www.google.es, the wevView shows an "ERROR_FILE_NOT_FOUND" loading the page "file:///android_asset/Content/https://www.google.es"

This the OnElementChanged of the HybridWebViewRenderer:

I need to execute a function defined in wpf project, which is called from JS in a https web page. The demo project of all codes is here: https://github.com/tomxue/WebViewIssueInWpf

JS part: The web page link is https://cmsdev.lenovo.com.cn/musichtml/leHome/weather/index.html?date=&city=&mark=0&speakerId=&reply=

And it contains below line:

I am using Xamarin.Forms with Prism and the Syncfusion RichTextEditor component on an Android device. The issue I am having is that I can't seem to retrieve the edited text back in the view model. I have used a binding to the Text property, which is always null. I have tried to add an event handler for "TextChanged" event in the code behind - this event is never fired. I have attempted to call RichTextEditor.GetHtmlString() in the code behind too - which returns null.

The editor displays correctly in the app and all editing functionality(bold, italic etc.) seem to work just fine, however a warning in the output log shows:

[INFO:CONSOLE(1)] "Uncaught TypeError: jsBridge.invokeAction is not a function", source: (1)12-19 11:10:32.963 I/chromium(13310): [INFO:CONSOLE(1)] "Uncaught TypeError: jsBridge.invokeAction is not a function", source: (1)

Xamarin.Forms - 4.4.0.991265

Syncfusion.Xamarin.SfRichTextEditor - 17.4.0.39

Edit: Syncfusion support have provided an example where the modified text is correctly updated in the view model. The only visible difference is that it is using Unity not DryIoc. I have created a replica sample project using DryIoc and the updated text is still correctly being populated in the view model... must be something to do with the project setup!!