CODEWITHSUNDEEP
android.netgoogle-cloud-messaging
user1842744
user1842744

Reputation: 218

How to send push notifications to multiple users using GCM

I followed some demo's and its working fine in my mobile. But i have some questions. Is Registration Id is unique for application or user? If it is unique for user then how to save multiple regID's in server(dot net). Please give me some guidance.

Upvotes: 3

Views: 4999

Answers (4)

Zyoo
Zyoo

Reputation: 773

If it is unique for user then how to save multiple regID's in server(dot net). Please give me some guidance.

When the device registered with the GCM server, the device MUST send that unique ID to your server, and then you save that value for sending messages.

How to send push notifications to multiple users using GCM?

You create message with a format. For multiple IDs, just fill the registration_ids key with your user IDs in the form of array object

Example in python:

ids=[]
query= // get all user record from database
for q in query:
    ids.append(q.registration_id)
// some code
jsonmessage=json.dumps({
    "registration_ids":ids,
    "data":{
        "message":message,
        "time":datetime.datetime.today().isoformat(),
        "sender":sender
     }
})
conn.send(jsonmessage)

That will look like this:

Content-Type:application/json
Authorization:key=AIzaSyB-1uEai2WiUapxCs2Q0GZYzPu7Udno5aA
{
  "registration_ids" : ["APA91bHun4MxP5egoKMwt2KZFBaFUH-1RYqx...", "second_id", "third_id"],
  "data" : {
    ...
  },
}

Upvotes: 4

Aprian
Aprian

Reputation: 1728

Quoted from Android docs, a RegId is:

An ID issued by the GCM servers to the Android application that allows it to receive messages. Once the Android application has the registration ID, it sends it to the 3rd-party application server, which uses it to identify each device that has registered to receive messages for a given Android application. In other words, a registration ID is tied to a particular Android application running on a particular device.

So a RegId is Application and User specific.

For storing, you can send a Post after the registration of GCM complete. Use the sample apps provided by Google and you will get some clues.

Upvotes: 0

Anup Cowkur
Anup Cowkur

Reputation: 20563

You can send multicase messages to upto 1000 users at once. See Google's guide:

http://developer.android.com/training/cloudsync/gcm.html

Apart from that, You can make an array of all registered users and send messages to all of them individually one-by-one.

Upvotes: 0

Neha.R
Neha.R

Reputation: 513

Yes registration ID is unique to particular User for particular application. You can create your databse and store them all

Upvotes: 0

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