Send FCM messages from server side to android device

Question

With the new update, FCM is now going to be used.

I tried the sample app from git and it's working all fine. I can send notifications from the console.

But I want to send the notification from the server after a certain event is triggered. I followed the same approach like in GCM but it's not working.

05-20 20:40:58.941 30132-30919/com.google.firebase.quickstart.fcm E/AndroidRuntime: FATAL EXCEPTION: pool-1-thread-1
                                                                                    Process: com.google.firebase.quickstart.fcm, PID: 30132
                                                                                    java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String com.google.firebase.messaging.RemoteMessage$Notification.getBody()' on a null object reference
                                                                                        at com.google.firebase.quickstart.fcm.MyFirebaseMessagingService.onMessageReceived(MyFirebaseMessagingService.java:53)
                                                                                        at com.google.firebase.messaging.FirebaseMessagingService.zzo(Unknown Source)
                                                                                        at com.google.firebase.messaging.FirebaseMessagingService.zzn(Unknown Source)
                                                                                        at com.google.firebase.messaging.FirebaseMessagingService.zzm(Unknown Source)
                                                                                        at com.google.firebase.iid.zzb$2.run(Unknown Source)
                                                                                        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
                                                                                        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
                                                                                        at java.lang.Thread.run(Thread.java:818)
05-20 20:40:59.118 30132-30279/com.google.firebase.quickstart.fcm E/Surface: getSlotFromBufferLocked: unknown buffer: 0xb9e83390

Am following this PHP Script to send the notification. If I try to execute the script, I get the following result.

{"multicast_id":4679427854122301046,"success":1,"failure":0,"canonical_ids":0,"results":[{"message_id":"0:1463757518309261%31bd1c96f9fd7ecd"}]}

NOTE : I went through their docs and modified the code is gist to have only body and title. Even then it's not working.

Answer 1

You can use this complete code

<?php

function sendFCM($mess,$id) {
$url = 'https://fcm.googleapis.com/fcm/send';
$fields = array (
        'to' => $id,
        'notification' => array (
                "body" => $mess,
                "title" => "Title",
                "icon" => "myicon"
        )
);
$fields = json_encode ( $fields );
$headers = array (
        'Authorization: key=' . "AIzaSyA9vpL9OuX6moOYw-4n3YTSXpoSGQVGnyM",
        'Content-Type: application/json'
);

$ch = curl_init ();
curl_setopt ( $ch, CURLOPT_URL, $url );
curl_setopt ( $ch, CURLOPT_POST, true );
curl_setopt ( $ch, CURLOPT_HTTPHEADER, $headers );
curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, true );
curl_setopt ( $ch, CURLOPT_POSTFIELDS, $fields );

$result = curl_exec ( $ch );
curl_close ( $ch );
}

?>

Pass message and token id as a parameter to the sendFCM($mess,$id) call.

Answer 2

I tried this and worked:

<?php
$ch = curl_init("https://fcm.googleapis.com/fcm/send");
$header=array('Content-Type: application/json',
"Authorization: key=GoGdfsflknEFñslknaglksjfnklj");
curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
curl_setopt( $ch,CURLOPT_SSL_VERIFYPEER, false );

curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, "{ \"notification\": {    \"title\": \"Test desde curl\",    \"text\": \"Otra prueba\"  },    \"to\" : \"SGferg-qWEFWbI:dflñkndfakllvakrgalkgjdgjslfkgjdglksdjflksjglkjlkñerhTHDFSHFZDHzdfakjsdhskjhgkjashfdasjdkf\"}");

curl_exec($ch);
curl_close($ch);
?>

This is the result:

{"multicast_id":4913280949692448120,"success":1,"failure":0,"canonical_ids":0,"results":[{"message_id":"0:1473389987003950%ab9a0bb6ab9a0bb6"}]}

Answer 3

In order to receive the notification using remoteMessage.getNotification().getBody(), you have to use the predefined set of key option for notification.

In this case, "notification" is the key word.

The JSON response has to be formatted like this.

   {
      "to" : "bk3RNwTe3H0:CI2k_HHwgIpoDKCIZvvDMExUdFQ3P1...",
      "notification" : {
          "body" : "great match!",
          "title" : "Portugal vs. Denmark",
          "icon" : "myicon"
      }
   }

You can also send notification and data payload in the same JSON response

 {
    "to" : "APA91bHun4MxP5egoKMwt2KZFBaFUH-1RYqx...",
    "notification" : {
        "body" : "great match!",
        "title" : "Portugal vs. Denmark",
        "icon" : "myicon"
    },
    "data" : {
        "Nick" : "Mario",
        "Room" : "PortugalVSDenmark"
    }
 }

see this: https://firebase.google.com/docs/cloud-messaging/concept-options#messages-with-both-notification-and-data-payloads