Android- Webview onPageFinished Called Twice

Question

I have an activity that does OAuth authentication by intercepting the redirect url once it show up in the webview. However, the onPageFinished function is somehow called twi

Answer 1

Android for some reason calls onPageFinished() twice(and onPageStarted() three times!) when the loaded url is not a working one. The temporary solution is changing the redirect_uri to the url of a working website; in this case, I changed it to https://www.google.com/ (lol, sorry Google). onPageFinished is then only called once.

BUT- I do still want answers on why webview behaves differently when the loaded url is not a working one, and what is a better solution than changing the redirect_uri to google.com.