Firebase message is received on device but not displayed via notification - php

Question

I'm trying to integrate Firebase Cloud Messaging (I use this code, which is mirrored here) with my existing app.
Relevant codes:
service.php
$msg_id = $_POST['id'];
$title = $_POST['title'];
$content = $_POST['content'];
$msg_date = $_POST['date'];
$author = $_POST['author'];
// insert the message into DB
$sql = "INSERT INTO tbl_message(msg_id, title, content, msg_date, author) VALUES ('$msg_id','$title','$content','$msg_date','$author')";
if ($result = mysqli_query($db, $sql)){
$firebase = new Firebase();
$push = new Push();
$payload = array();
$payload['foo'] = '123';
$payload['bar'] = 'xyz';
$push->setTitle($title);
$push->setMessage($content);
$push->setAuthor($author);
$push->setDate($msg_date);
$push->setImage('');
$push->setPayload($payload);
$push->setIsBackground(FALSE);
$resp = '';
$response = '';
$resp = $push->getPush();
$response = $firebase->sendToTopic('global', $resp);
echo $response;
}
Firebase.php
<?php
class Firebase {
// sending push message to single user by firebase reg id
public function send($to, $message) {
$fields = array(
'to' => $to,
//'data' => $message,
'data' => array("message" => $message));
return $this->sendPushNotification($fields);
}
// Sending message to a topic by topic name
public function sendToTopic($to, $message) {
$fields = array(
'to' => '/topics/' . $to,
//'data' => $message,
'data' => array("message" => $message)
);
return $this->sendPushNotification($fields);
}
// sending push message to multiple users by firebase registration ids
public function sendMultiple($registration_ids, $message) {
$fields = array(
'to' => $registration_ids,
//'data' => $message,
'data' => array("message" => $message)
);
return $this->sendPushNotification($fields);
}
// function makes curl request to firebase servers
private function sendPushNotification($fields) {
require_once 'config.php';
// Set POST variables
$url = 'https://fcm.googleapis.com/fcm/send';
$headers = array(
'Authorization: key=' . FIREBASE_API_KEY,
'Content-Type: application/json'
);
// 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);
return $result;
}
}
?>
MainActivity.java
package studio.emcorp.monitoringsiswa;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.NavigationView;
import android.support.design.widget.Snackbar;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.content.LocalBroadcastManager;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.text.TextUtils;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
import com.google.firebase.messaging.FirebaseMessaging;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
private static final String TAG = MainActivity.class.getSimpleName();
private BroadcastReceiver mRegistrationBroadcastReceiver;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
;
mRegistrationBroadcastReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
// checking for type intent filter
if (intent.getAction().equals(NotificationConfig.REGISTRATION_COMPLETE)) {
// gcm successfully registered
// now subscribe to `global` topic to receive app wide notifications
FirebaseMessaging.getInstance().subscribeToTopic(NotificationConfig.TOPIC_GLOBAL);
displayFirebaseRegId();
} else if (intent.getAction().equals(NotificationConfig.PUSH_NOTIFICATION)) {
// new push notification is received
String message = intent.getStringExtra("message");
Toast.makeText(getApplicationContext(), message, Toast.LENGTH_LONG).show();
//txtMessage.setText(message);
}
}
};
#Override
protected void onResume() {
super.onResume();
// register GCM registration complete receiver
LocalBroadcastManager.getInstance(this).registerReceiver(mRegistrationBroadcastReceiver,
new IntentFilter(NotificationConfig.REGISTRATION_COMPLETE));
// register new push message receiver
// by doing this, the activity will be notified each time a new message arrives
LocalBroadcastManager.getInstance(this).registerReceiver(mRegistrationBroadcastReceiver,
new IntentFilter(NotificationConfig.PUSH_NOTIFICATION));
// clear the notification area when the app is opened
NotificationUtil.clearNotifications(getApplicationContext());
}
#Override
protected void onPause() {
LocalBroadcastManager.getInstance(this).unregisterReceiver(mRegistrationBroadcastReceiver);
super.onPause();
}
}
Sending messages directly from Firebase Console works fine. Now the problem is sending messages via PHP script. Somewhow the server manages to send the message successfuly, e.g:
{"message_id":4732936739964848111}
, and the device receive it:
06-19 09:26:21.590 18604-19560/net.anta40.app.firebasetest
E/MyFirebaseMessagingService: From: /topics/global 06-19 09:26:21.590
18604-19560/net.anta40.app.firebasetest E/MyFirebaseMessagingService:
Data Payload:
{message={"data":{"image":"","is_background":false,"payload":{"bar":"xyz","foo":"123"},"title":"test","message":"mehehehe","timestamp":"2017-06-19
2:26:21"}}} 06-19 09:26:21.600 18604-19560/net.anta40.app.firebasetest
E/MyFirebaseMessagingService: push json:
{"message":{"data":{"timestamp":"2017-06-19
2:26:21","message":"mehehehe","payload":{"bar":"xyz","foo":"123"},"image":"","title":"test","is_background":false}}}
06-19 09:26:21.600 18604-19560/net.anta40.app.firebasetest
E/MyFirebaseMessagingService: Json Exception: No value for data 06-19
09:26:21.720 1098-1098/? D/wpa_supplicant: RX ctrl_iface -
hexdump(len=11): 53 49 47 4e 41 4c 5f 50 4f 4c 4c 06-19 09:26:21.720
1098-1098/? D/wpa_supplicant: wlan0: Control interface command
'SIGNAL_POLL'
but not displayed via notifications. What goes wrong here?

Answer 1

You are sending a data-only payload in your PHP:
public function send($to, $message) {
$fields = array(
'to' => $to,
//'data' => $message,
'data' => array("message" => $message));
return $this->sendPushNotification($fields);
}
Your other methods are also sending the same.
If you're going to use a notification-only payload, you could simply structure it like so:
public function send($to, $message) {
$fields = array(
'to' => $to,
'notification' => array("title" => $title,
"body" => $body));
return $this->sendPushNotification($fields);
}
The difference from sending a message from the Firebase Console is that messages from the console are considered as notification messages.
In Android, each message type is handled differently (see Handling Messages).
Some useful posts:
Issue with FCM notification
Can we push only data message from Firebase Notification console