gistfile1.txt

private class MyWebViewClient extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {

            String lastPathSegment = Uri.parse(url).getLastPathSegment();

            if(lastPathSegment.equals("login")) {
                MainActivity.this.loginFacebook();
                return true;
            } else {
                return false;
            }
        }
    }