B4J Question Communicating between JavaScript in Webview to B4J

You can do this in B4A.

I'm beginning to think that I might need to set up a local web server to achieve what I want

Derek Johnson said:

I'm beginning to think that I might need to set up a local web server to achieve what I want

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It does not help.

I don´t know a way to do the same in B4J like in Android...

DonManfred said:

It does not help.

I don´t know a way to do the same in B4J like in Android...

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The best I have managed to achieve is to submit a form to a server and to intercept the URL where I extracted the parameters. There were some oddities though; the server had to have a DNS record.

Have a look at https://www.b4x.com/android/forum/threads/making-upcalls-from-javascript-to-javafx.51794/post-374183

Daestrum said:

Have a look at https://www.b4x.com/android/forum/threads/making-upcalls-from-javascript-to-javafx.51794/post-374183

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Thanks! I've got the example working now in Release mode. It took me a while to realise that I had to add ".main" to the package name in this bit of the code where it gets the class for the module:

/* With package name b4j.wvtest.x */
Class<?> c = Class.forName("b4j.wvtest.x.main");

I've now created a standalone package from the code. (I needed to add this property to make it build:
#PackagerProperty: IncludedModules = javafx.web

It then created my wvtest.exe file and the B4J to Webview comms worked as it should.

The Webview to B4J communication did not work though; nothing was received when I clicked either of the send buttons.

I then ran the standalone file using the .bat file and I saw the expected messages for the B4J to Webview action but there was nothing in the log when I clicked the send message button to send from the Webview to the B4J app.

Does anyone have any suggestions as to how what else might need changing?

I've now fixed the problem with the standalone app. It was caused I think by my code not waiting for the page to finish loading loading before referring the Java code.