OnScrollChange does not fire for Webview

Question

I think I am doing something wrong here,

I added WebView.IOnScrollChangeListener in my activity

MainActivity : Activity, WebView.IOnScrollChangeListener

Then created an interface in the same activity

void WebView.IOnScrollChangeListener.OnScrollChange(View v, int scrollX, int scrollY, int oldScrollX, int oldScrollY)
  {
    Log.Info("101028", "scrolled??");
  }

Then I set the OnScrollChangeListener on my WebView

webView.SetOnScrollChangeListener(this);

The issue is, void WebView.IOnScrollChangeListener.OnScrollChange never fires

I also tried the following, but this also does not work

webView.ScrollChange += (o, e) => { Log.Info("101028", "scrolled??"); };

any idea what am I doing wrong here?

https://stackoverflow.com/questions/14752523/how-to-make-a-scroll-listener-for-webview-in-android — SushiHangover, May 04 '18 at 03:40
Hi, I saw that but the initial step is to extend the activity with WebView and when I do that in Xamarin I get the error `public class MainActivity : Activity, WebView` -- `can not have multiple base classes` which does make sense — Ali, May 04 '18 at 03:46

score 2 · Accepted Answer · answered May 07 '18 at 06:23

public class MainActivity : Activity, WebView -- can not have multiple base classes

There should be only one base class Activity, you can't inherit two class, the WebView should be an interface: View.IOnScrollChangeListener, and then implement the method:

public void OnScrollChange(View v, int scrollX, int scrollY, int oldScrollX, int oldScrollY)
{
    Log.Info("101028", "scrolled??");
}

OnScrollChange does not fire for Webview

1 Answers1