1a20ca06f1 connected a WebViewClient
to the WebView. But as soon as a client is connected, the WebView
stops handling links itself and tries to display everything on
its own.
Override shouldOverrideUrlLoading() and replicate what Android's
default WebView does if no WebViewClient is connected to work
around this.
This fixes#587.
Using
<meta http-equiv="Refresh" content="1; URL=http://example.com/">
in a HTML message causes WebView to load the URL in the default browser.
Overriding WebViewClient.shouldOverrideUrlLoading() allows us to cancel
loading this URL. Sadly, I found no way to find out whether the method was
called because of a meta refresh or because the user clicked on a link.
So now we're using HtmlCleaner to parse the HTML and remove all "meta" elements
containing an "http-equiv" attribute with a value of "refresh".