Android: How to interact with the contents of a WebView?

Is there a way to programmatically interact with the contents of a WebView?

For example, how could my app:

1. respond to an event (such as button clicked on a web page)

2. iterate through all the INPUT elements in a page开发者_开发百科 and retrieve their contents?

3. Find all DIV elements with the class status and change their content?

Thanks!

You can use Javascript to make a callback to Java for anything that Javascript can detect.

You can see a demo call JS to Java here: Android Calling JavaScript functions in WebView