Android custom Event to Javascript EventListener

Question

Is it possible to create in Android event, which sends data to Havascript EventListener in WebView?

For example:
In background, I start thread what search updates on server. When updates was found I send event to update data on user page. And I don't want reload view.

Answer 1

Currently the only way I found out was using JavaScript injection:

mWebView.loadUrl("javascript:helloWorld(\"hi\");"); //or postUrl if using HTTP POST

This will cause the function helloWorld defined in the JavaScript of the webpage to be called with parameter value hi.