How to get custom data from android firebase notification?

Question

I'm trying to implement firebase notifications. But I have trouble finding any documentation on how to retrieve custom data from firebase notification.

But in in code how to get the custom key.

I'm using FirebaseMessagingService.onMessageReceived to get the message data.

@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
    // TODO(developer): Handle FCM messages here.
    // If the application is in the foreground handle both data and notification messages here.
    // Also if you intend on generating your own notifications as a result of a received FCM
    // message, here is where that should be initiated. See sendNotification method below.
    Log.d(TAG, "From: " + remoteMessage.getFrom());
    Log.d(TAG, "Notification Message Body: " + remoteMessage.getNotification().getBody());
}

Chintan Soni · Accepted Answer · 2017-03-13T11:20:42.443

33

You can check your custom data using:

for (Map.Entry<String, String> entry : remoteMessage.getData().entrySet()) {
    String key = entry.getKey();
    String value = entry.getValue();
    Log.d(TAG, "key, " + key + " value " + value);
}

To get specific key:

String value = remoteMessage.getData().get("<YOUR_KEY>");

edited Mar 13 '17 at 11:20

answered Jul 22 '16 at 12:53

Chintan Soni

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i am using firebase in react native android , where should i mention this for loop.... in MyFirebaseMessagingService.java ? @Chintan Soni – Dec 09 '17 at 13:00
Yes. You have to put is in **MyFirebaseMessagingService.java**. – Maulik Dodia Jul 03 '18 at 13:08
Does this code should to be inserted within onMessageReceived method? Because it doesn't work – Fernando Torres Aug 21 '22 at 16:41

score 6 · Answer 2 · answered Jul 22 '16 at 12:25

Let A be your key, then you can easily parse this value by using the following code.

JSONObject json = new JSONObject(remoteMessage.getData());
    Iterator itr = json.keys();
    while (itr.hasNext()) {
    String key = (String) itr.next();
           if (key.equals("A")) {
                flag = json.getString(key);
           }
           Log.d(TAG, "..." + key + " => " + json.getString(key));
    }

How to get custom data from android firebase notification?

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