I download a pdf stream from my server. In my app I save the bytearray to a the local folder as pdf. But when I open it in the webview, it just shows a white page.
I
Following approach will allow you to view pdf in xamarin forms. If you are trying to open one from azure blob or you have valid URl.
WebView webView = new WebView();
var page = new ContentPage();
webView.Source = "https://docs.google.com/viewer?url=http://yourpdfurl.pdf";
page.Content = webView;
Navigation.PushModalAsync(page);