How to safely turn WebView zooming on and off as needed

Question

As mentioned in this unanswered question: WebView throws Receiver not registered: android.widget.ZoomButtonsController

By turning the WebView zoom controls on and of

Answer 1

I have the same issue here: Existent app blowing up with android 3.0 XOOM. ZoomButtonsController Leak?

This happens when there's an exception that happens before registerReceiver is called and then you try to unregisterReceiver later without it ever been registered.

It's probably a android 3.0 bug.