title: How to merge multiple applications into a single application
body: <p>i have developed some applications like making call, add contact ,send sms  for blind people.</p>
  
  <p>Now i want to merge them into single application like <a href="https://play.google.com/store/apps/details?id=es.codefactory.android.app.ma.vocalizerenudemo&amp;feature=search_result" rel="nofollow">Mobile accessibility demo</a></p>
  
  <p>i want to make it to work similar to it. how to make it possible?? ,<strong>how can i make the application speak when the user touches on it. how to integrate all the developed apps into single app and make them work when user touches a specific app.</strong></p>
  
  <p>please provide me some tutorial links/sample codes to make these things possible..</p>