WebViewTest | test made to try out javascript communication | Android library

I want to make transparant background and showing in center layout. But i'm very confused when i'm used relative layout my apps crash after showing progress bar and didn't transparant background.

I'm using android studio to make a webview apps.

This is my code MainActivity

I'm using Microsoft Toolkit Web View to embed Microsoft Edge in my WPF C# application.

I can't find anyway to get document and innerHTML of webview and there's nothing in documentation.

Here's XAML :

I am currently working on a JavaFX based application, where users can interact with places that are marked on a world map. To do this, I am using an approach similiar to the one described in http://captaincasa.blogspot.de/2014/01/javafx-and-osm-openstreetmap.html ([1]).

However, I am facing a hard-to-debug problem related to the Javascript callback variable injected to the embedded HTML-page using the WebEngine's setMember() method (see also https://docs.oracle.com/javase/8/javafx/embedded-browser-tutorial/js-javafx.htm ([2]) for an official tutorial).

When running the program for a while, the callback variable is loosing its state unpredictably! To demonstrate this behaviour, I developed a minimal working/failing example. I am using jdk1.8.0_121 64-bit on a Windows 10 machine.

The JavaFx App looks as follows:

I'm extracting frames from a WebView in it's draw method and scrolling it programmatically. The problem is, no matter how big my bitmap is, I only get the output from the WebView based on its initial dimensions. the getHeight() returns a value of 1440 and that's all I can ever get from the WebView even if I make the bitmap larger and/or I scroll the WebView. this is its draw method:

scrollTo in WebView UWP may be achieved through: