Please, has anyone here implemented Google Cloud Messaging on Android?

Do you have a problem using Google Cloud Messaging on android or you just want to check if someone has used it before? If it is the former you can share your problem and someone might be of help.

Okay here it goes,

I am trying to create a GCM server for a notification system for an Android app, i have read the brief explanation they gave here http://developer.android.com/google/gcm/server.html. Asked on stackoverflow and i was advised to use GCM HTTP. Fortunately, they had code implementation samples in Java (servlets) here http://code.google.com/p/gcm/source/browse/#git%2Fsamples But i seem to be missing something.

Assuming, i want to build something like an email app or an I.M app like whatsapp. So each time a user gets a new email, my server sends a notification via GCM to my android app installed on the users phone, how do i do this? i know its probably going to be sent in JSON format and the client side parses the data it sends and pushes it as a notification. But how do i send the info i want, lets say this is the data i want to push to the user

"operation": "new_email",
"username": "nollyj",
"subject": "Android app developer"
"email" : "nollj@nairaland.com"
body: "hi"

Please how exactly can i do this?, so far, I'm i on track?

Okay, its getting a bit clearer now, just a bit

After reading this http://developer.android.com/google/gcm/http.html

http://developer.android.com/google/gcm/http.html

I was told to make a POST request to https://android.googleapis.com/gcm/send.

in this format

{ "data": {
   "operation": "new_email",
   "username": "nollyj",
   "subject": "Android app developer"
   "email" : "nollj@nairaland.com"
   "body: "hi"
  },
  "registration_ids": ["4"]
}

It brings a few more questions like, how do i know which user has which registration id,

example how do i know the registration_id of nollyj==4

where are this registration ids even stored?

what is the role of all the code i got from here http://code.google.com/p/gcm/source/browse/#git%2Fsamples

Thanks, i think i get it now

Javanian: Thanks, i think i get it now

Nice that you have solved your problem. Just coming back now.

Javanian: Thanks, i think i get it now

You should post what you figured out for others to learn from your experience.