当app是后台FCM时，如何检索通知消息intent.getExtras（）

Question

I am using FCM for Simple notification

When the app is in foreground, everything working properly. I am getting a notification plus the data message inside the onMessageReceived method.

But when app is in background, I am getting notification in system tray. And when I click on the control, it goes to the main activity. And When I parse intent.getExtras(); , I am getting only this key data - google.sent_time , from , google.message_id , collapse_key .

How to get the notification message title and Message which is visible in system tray from intent.getExtras() ?

I am using FCM console for sending notification I don't have my dedicated server to do this.

Code for receiving the message:

final Bundle extras = intent.getExtras(); 
final Set<String> keySet = extras.keySet(); 
final Iterator<String> iterator = keySet.iterator(); 
while (iterator.hasNext()) {     
    final String key = iterator.next(); 
    final Object o = extras.get(key); 
    System.out.println(key + ":" + o); 
} 

Answer 1

As seen in the Handling Messages for Android FCM docs , if the payload you sent has both notification and data, it will be handled separately. The notification part will be handled by the Notification Tray, while the data part will be in the extras of the intent.

AFAIK, there is no way to get the notification payload when the app is in background (always handled by the Notification Tray). However, what you could do is add custom key-value pairs to your data payload instead, like so:

{
"data": {
      "notification_title": "title here",
      "notification_message": "message here"
     }
}

Of course you'll have to make sure that the data value for notification_title and notification_message is the same as to what you set it in the notification payload. Then just retrieve it from the Intent extras like usual.

Answer 2

Firebase Notfication will behave as Data Message when your app is in background or is killed. In these Scenarios, if you want to retrieve your notification Message then you must define it in Key Value pair under

Advanced Option of FCM Console

and then retrieve this message by using this key in your activity which will be open by tabbing the Notification.

 if (getIntent().getExtras() != null) {
        Object value ;
        for (String key : getIntent().getExtras().keySet()) {
            if(key.equals("Message Key")) {
                 value = getIntent().getExtras().get(key); // value will represend your message body... Enjoy It
                 Log.d("NotificationTag" , key+"____" + value);
                }
          }
   } 

Answer 3

Just override the handleIntent() method of FirebaseMessagingService .class it will called in both foreground and background mode and here your can get and parse notification key and payload data

public void handleIntent(Intent intent)
    {
    String title = bundle.getString("gcm.notification.title");
     String body = bundle.getString("gcm.notification.body");
    }

Note: it will worked for play service 11