title: Android: How to display an app in the contact profile screen (under connections)
body: <p>I have an app that can show a stream of tweets from a twitter user. 
  I want to add the app to the device contact screen so when the user opens a contact there will be a button for my app in the same page under connections (like the button WhatsApp added to my contacts). So when the user clicks it my app activity will be called containing some info about the contact that was clicked. Then, I'll make the connection between the contact info and his tweeter account in my app and display his tweets.</p>
  
  <p>How can i implement this? Where do i begin?</p>