title: How to display a Dialog from a Service?
body: <p>I have read really a lot of posts about this topic, however nothing works for me (or doesn't have the effect I wish). </p>
  
  <p>I have a an application, that after logging in starts a background Service (implementation of the Service class). This service syncs itself with a Server and if a new order comes, it creates a notification. </p>
  
  <p>So far, everything works great, I have the notification and the Toast message. However, I would like to have a dialog, that notifies the user about the new order. </p>
  
  <p>As I understood, you can start an activity from within the service, which displays the dialog. This works, but the activity starts on top of the current activity stack and displays the dialog. I have an activity with no view attached and it correctly displays the dialog, however, on a black background. </p>
  
  <p>What I want is to display the dialog on the current activity, causing the actual background(the running activity) to fade and display the dialog. </p>
  
  <p>Is this somehow possible? </p>