title: How to send push notification programmatically on specific firebase FCM registered token in Android
body: <p>I want to know that is there any way to send push notification programmatically on particular FCM registered token (Device token)? i had implemented group chat but stuck in one-one chat.</p>
  
  <p>I don't want to use any web-service or any back-end at all, because i am using Firebase database and storage as a Back-end in my application.</p>
  
  <p>i want to send upstream message to particular device token.</p>
  
  <p>Any idea's how to do that ? thanks.</p>