I have developed a website which is mainly used in mobile phones.
I want to allow users to share information directly from the web page into WhatsApp.
Using UserAgent detection I can distinguish between Android and iOS.
I was able to discover that in order to implement the above in iOS I can use the URL:
href="whatsapp://send?text=http://www.example.com"
I'm still looking for the solution to be used when the OS is Android (as the above doesn't work).
I guess it is somehow related to using "intent" in Android, but I couldn't figure out how to do it as parameter for href.
Just saw it on a website and seems to work on latest Android with latest chrome and whatsapp now too! Give the link a new shot!
<a href="whatsapp://send?text=The text to share!" data-action="share/whatsapp/share">Share via Whatsapp</a>
Rechecked it today (17th April 2015):
Works for me on iOS 8 (iPhone 6, latest versions) Android 5 (Nexus 5, latest versions).
It also works on Windows Phone.