Error "validate_display:255 error 3008 (EGL_BAD_DISPLAY)" by Toutorial

Not related to sapui

Don't know whether it will help others or not.

I've got this error when I was trying to open a pdf file in webview by using google docs.

I've changed

webView.loadUrl(url);

to

webView.loadUrl("http://docs.google.com/gview?embedded=true&url=" + url);

and it worked.