URL to launch inside the app.

[jaichith]

hi,

I am planning to create an app for printing invoices. this time I am going to use HTML for the templates. 

I was going around sample apps . In that I could see , always URL is opening externally. I could not open or preview inside the app (tried in both mobile and desktop).

Note: In URL Action button Launch Externally is disabled

Kindly suggest how to open the URL inside the app .          Sample App