How to add event handling to View?

Question

Android

The bottom line is this: I create a WebView component in an Android application using the code:

protected WebView createViewInstance(ThemedReactContext reactContext) {
        WebView view = super.createViewInstance(reactContext);	
        final AndroidWebViewModule module = this.aPackage.getModule();
        view.setWebChromeClient(new WebChromeClient(){
                ...
        });
        return view;
    }

I don't understand Java at all, so I'm asking for help with the following question: how to attach an event handling to which this View should respond to a View associated with a WebView ? I need an event like this:

protected void onWindowVisibilityChanged(visibility) {
    if (visibility != View.GONE) super.onWindowVisibilityChanged(visibility);
  }

In other words, when the application is minimized, an event should be fired that simulates the continuation of the "active" state of the application.
Thank you in advance for your response.