title: Android Push Notifications Parameters
body: <p>So I have looked at numerous tutorials and references but can't seem to find the information I am looking for.  I am creating a server that is built for push notifications, on the GCM notifications it looks like I need 4 pieces of information.<br>
  1.Sender_ID
  2.Authorization Token
  3.Device REgistration ID
  4. Package name.</p>
  
  <p>The issue I am having is finding out where and who is supposed to acquire these items.  I know the device registration ID is from the phone, I have found references saying that both the Authrization token and the Sender_ID are the API key.  So I am guessing one of those is the key and I am missing the other piece.  Package name I have no clue on, if anyone has any input as to where I can find this info and how to retrieve it I would appreciate it.</p>