Send multiple messages with GCM - php

Question

I've been dealing with this issue since 2 days. What I want to do is, I've to send multiple messages to registered GCM device. Till now I can send single message to device. Below is the code to send message.
send_message.php
<?php
if (isset($_REQUEST["regId"]) && isset($_REQUEST["message"])) {
$regId = $_REQUEST["regId"];
$message = $_REQUEST["message"];
include_once './GCM.php';
$gcm = new GCM();
$registatoin_ids = array($regId);
$message = array("price" => $message);
$result = $gcm->send_notification($registatoin_ids, $message);
echo $registatoin_ids; echo $message;
echo $result;
}
GCM.php
<?php
class GCM {
//put your code here
// constructor
function __construct() {
}
//Sending Push Notification
public function send_notification($registatoin_ids, $message) {
// include config
include_once './config.php';
// Set POST variables
$url = 'https://android.googleapis.com/gcm/send';
$fields = array(
'registration_ids' => $registatoin_ids,
'message' => $message,
);
$headers = array(
'Authorization: key=' . GOOGLE_API_KEY,
'Content-Type: application/json'
);
//print_r($headers); exit();
// Open connection
$ch = curl_init();
// Set the url, number of POST vars, POST data
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
// Disabling SSL Certificate support temporarly
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields));
// Execute post
$result = curl_exec($ch);
if ($result === FALSE) {
die('Curl failed: ' . curl_error($ch));
}
// Close connection
curl_close($ch);
echo $result;
}
}
?>
Here message is being received on receiver side..
// code for this is in GCM.php
$fields = array(
'registration_ids' => $registatoin_ids,
'message' => $message,
);
But I want to send multiple messages in single notification. for that what I did...
send_message.php
<?php
if (isset($_REQUEST["regId"]) && isset($_REQUEST["message"]) && isset($_REQUEST["data"])) {
$regId = $_REQUEST["regId"];
$message = $_REQUEST["message"];
$data = $_REQUEST["data"]; //added third parameter
include_once './GCM.php';
$gcm = new GCM();
$registatoin_ids = array($regId);
$message = array("price" => $message);
$data = array("extra" => $data);
$result = $gcm->send_notification($registatoin_ids, $message, $data);
echo $registatoin_ids; echo $message; echo $data;
echo $result;
}
GCM.php
<?php
class GCM {
//put your code here
// constructor
function __construct() {
}
/**
* Sending Push Notification
*/
public function send_notification($registatoin_ids, $message, $data) {
// include config
include_once './config.php';
// Set POST variables
$url = 'https://android.googleapis.com/gcm/send';
$fields = array(
'registration_ids' => $registatoin_ids,
'message' => $message,
'data' => $data,
);
$headers = array(
'Authorization: key=' . GOOGLE_API_KEY,
'Content-Type: application/json'
);
//print_r($headers); exit();
// Open connection
$ch = curl_init();
// Set the url, number of POST vars, POST data
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
// Disabling SSL Certificate support temporarly
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields));
// Execute post
$result = curl_exec($ch);
if ($result === FALSE) {
die('Curl failed: ' . curl_error($ch));
}
// Close connection
curl_close($ch);
echo $result;
}
}
?>
And in android I wrote the function to receive message like this...
#Override
protected void onMessage(Context context, Intent intent) {
Log.i(TAG, "Received message");
String message = intent.getStringExtra("price");
String newmessage = intent.getStringExtra("extra");
displayMessage(context, message + newmessage);
generateNotification(context, message + newmessage);
}
But I'm getting null result for "price" and getting result for "extra".
How can I receive multiple message string in single notification?

Answer 1

In send_message.php
Put both messages in the same object. I don't know why you call it price, but try like this:
$message = array('message' => $message,
'extra' => $data
);
In GCM.php
$fields = array(
'registration_ids' => $registatoin_ids,
'data' => $message,
);
In your Android Service
protected void onMessage(Context context, Intent intent) {
//log the message in JSON format
Log.i(TAG, "Received message >> " + intent.getExtras().toString());
//Retrieve message and extra
String message = intent.getExtras().getString("message");
String newmessage = intent.getExtras().getString("extra");
//Now display the message
displayMessage(context, message + newmessage);
generateNotification(context, message + newmessage);
}

Answer 2

All the payload parameters you pass in your JSON should be within the data element.
Your JSON should look like this :
{
"registration_ids":["xxx", "yyy"],
"data": {
"price": "price value",
"extra": "extra value"
}
}
And not like this :
{
"registration_ids":["xxx", "yyy"],
"message": {
"price": "price value"
},
"data": {
"extra": "extra value"
}
}

Answer 3

you can write a JSON response that contain a multiple messages
and the you get the JSON in android , parse it and get your multiple Messages .

Answer 4

send_message.php
<?php
if (isset($_REQUEST["regId"]) && isset($_REQUEST["message"]) && isset($_REQUEST["extra"])) {
$regId = $_REQUEST["regId"];
$message = $_REQUEST["message"];
$extra= $_REQUEST["extra"];
include_once './GCM.php';
$gcm = new GCM();
$registatoin_ids = array($regId);
$message = array("message" => $message, "extra" => $extra);
$result = $gcm->send_notification($registatoin_ids, $message);
}
GCM.php
<?php
class GCM {
function __construct() {
}
public function send_notification($registatoin_ids, $message) {
// include config
include_once './config.php';
// Set POST variables
$url = 'https://android.googleapis.com/gcm/send';
$fields = array(
'registration_ids' => $registatoin_ids,
'data' => $message,
);
$headers = array(
'Authorization: key=' . GOOGLE_API_KEY,
'Content-Type: application/json'
);
//print_r($headers); exit();
// Open connection
$ch = curl_init();
// Set the url, number of POST vars, POST data
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
// Disabling SSL Certificate support temporarly
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields));
// Execute post
$result = curl_exec($ch);
if ($result === FALSE) {
die('Curl failed: ' . curl_error($ch));
}
// Close connection
curl_close($ch);
echo 'result';
echo json_encode($fields);
echo $result;
}
}
Android side
/**
* Method called on Receiving a new message
* */
#Override
protected void onMessage(Context context, Intent intent) {
Log.i(TAG, "Received message");
String message = intent.getExtras().getString("extra");
String newmessage = intent.getExtras().getString("message");
displayMessage(context, message + newmessage);
generateNotification(context, message + newmessage);
}