title: How to open Whatsapp from other app with a specific contact?
body: <p>I've read how to open whatsapp from my app, as explained from the question <a href="https://stackoverflow.com/questions/29516628/how-to-open-whatsapp-from-other-app">How to open Whatsapp from other app</a> - but it does not explain there how to open chat with a specific contact. Is there any way to open chat with specific contacts?</p>