Google announced a new messaging model with Google Cloud Messaging on last years Google IO. This model allows for upstream messaging and for user specific notifications. This post is the first in a three-part series in which I am going to look into both these changes and to show you how to use them. I had never written these posts if it weren't for the Dutch Android User Group meetup in Utrecht (J
![Upstream Messages With Google Cloud Messaging](https://cdn-ak-scissors.b.st-hatena.com/image/square/ca21541ab11c8528b797439d262480ae463b949a/height=288;version=1;width=512/http%3A%2F%2Fwww.grokkingandroid.com%2Fwordpress%2Fwp-content%2Fuploads%2F2014%2F02%2Fgcm_classic-300x242.png)