I used the webview to open a page by url successfully on Andriod. Everything looks good and the contents of the page is displayed correctly. The page is also closed successfully after reading some links in the view. The whole game directly exit when destroy the opened view soon after creating the view in an unintentional operation. This is easily reproduced on two andriod phones.
There might be some precondition or status to destroy the view.
Could you make a try?