How to send Push Notifications with Parse.com Cloudcode

Question

I want to send a Push Notification with Cloudcode on Parse.com.

The push notification should be sent to all android devices that are subscribed to a specific channel and trigger a service.

Answer 1

All you need is an installation query, along with an accompanying push. For example:

var pushQuery = new Parse.Query(Parse.Installation);
pushQuery.containedIn("user", userlist);
Parse.Push.send({
  where: pushQuery, 
  data: {
     alert: "Your push message here!"
  }
}, {
  success: function() {
    response.success("pushed");
  }, error: function(error) {
   reponse.error("didn't push");
  }
});

That installation query can be a query based on a channel, and there are other specifications you can make for the push query, given in the documentation:

Parse Docs

Answer 2

You don't need a query to send a push to a channel. Just call Parse.Push.send and add a channel array to the data object.

Parse.Push.send({
        channels: [ "channel_name" ],
        data: {
            alert: "Alert message"
        }
    }, {
        success: function () {
            response.success("Push was sent");
        },
        error: function (error) {
            response.error("Could not send push " + error)
        }
    });

Be sure to not use spaces and Capital letters in channel names. The channel will not be added to the subscribed channels in the backend.