Parse a Bundle which is a JSONString in Remotemessage to JSON object

Question

I am trying to parse the notification data in FCM. I will try to explain my problem as detailed as i can. I have to two apps one is android and the other is javascript webapp. so when sending pushnotification from webapp to androd app I am sending the notification data in jsonstring format. Now i am unable to convert it to JSONObject on the java side(android). Below is my code

    var notification = {
    'TITLE': currentUser.displayName,
    'MSG': message,
    'CHAT_KEY': chatKey,
    'MSG_KEY': 'messageKey',
    'USER_DISPLAY_NAME': currentUser.displayName,
    'USER_EMAIL': currentUserEmail, 
    'USER_FCM_DEVICE_ID': toKey,
    'USER_FCM_DEVICE_ID_SENDER': fromKey,
  };

  fetch('https://fcm.googleapis.com/fcm/send', {
    'method': 'POST',
    'headers': {
      'Authorization': 'key=' + fromKey,
      'Content-Type': 'application/json'
    },
    'body': JSON.stringify({
      'notification': notification,
      'to': toKey
    })
  }).then(function(response) {
    console.log(response);
  }).catch(function(error) {
    console.error(error);
  })
};

And on the android side

@Override public void onMessageReceived(RemoteMessage remoteMessage) {

    if (remoteMessage.getNotification() != null) {


        sendDefaultNotification(remoteMessage.getNotification().getTitle(),
                remoteMessage.getNotification().getBody());
    } else {
        String currentUserEmail = "";
        FirebaseAuth auth = FirebaseAuth.getInstance();
        if (auth.getCurrentUser() != null && auth.getCurrentUser().getEmail() != null) {
            currentUserEmail = auth.getCurrentUser().getEmail();
        }

        String userName = remoteMessage.getData().get(Constants.KEY_USER_DISPLAY_NAME);
        String userEmail = remoteMessage.getData().get(Constants.KEY_USER_EMAIL);
        String chatKey = remoteMessage.getData().get(Constants.KEY_CHAT_KEY);
        String deviceId = remoteMessage.getData().get(Constants.KEY_USER_FCM_DEVICE_ID);
        String deviceIdSender = remoteMessage.getData().get(Constants.KEY_USER_FCM_DEVICE_ID_SENDER);
        String title = remoteMessage.getData().get(Constants.KEY_MSG_TITLE);
        String msg = remoteMessage.getData().get(Constants.KEY_MSG);
        String msgKey = remoteMessage.getData().get(Constants.KEY_MSG_KEY);

        /*if (chatKey.equals(ConstantsFirebase.FIREBASE_LOCATION_CHAT_GLOBAL)) {
            title = String.format("%s- %s", title, ConstantsFirebase.CHAT_GLOBAL_HELPER);
        } else {*/
            if (!currentUserEmail.equals(Utils.decodeEmail(userEmail))) {
                setMessageReceived(FirebaseDatabase.getInstance().getReference()
                        .child(ConstantsFirebase.FIREBASE_LOCATION_CHAT).child(chatKey).child(msgKey)
                        .child(ConstantsFirebase.FIREBASE_PROPERTY_MESSAGE_STATUS));
            }
      /*  }*/

        boolean notificationIsActive = PreferenceManager.getDefaultSharedPreferences(this)
                .getBoolean(Constants.KEY_PREF_NOTIFICATION, false);
        if (auth.getCurrentUser() != null && notificationIsActive) {
            if (!currentUserEmail.equals(Utils.decodeEmail(userEmail))) {

                Utils.setAdditionalData(new PushNotificationObject
                        .AdditionalData(title, msg, chatKey, msgKey, userName,
                        userEmail, deviceId, deviceIdSender));
                sendNotification(title, msg);
            }
        }
    }
}

Here I am considering the Remotemessage directly as JSONObject but it's coming in bundle jsonstring. How do I parse it?

Output:

Bundle[{gcm.notification.USER_DISPLAY_NAME=ishku sukshi, google.sent_time=1512190657773, gcm.notification.TITLE=ishku sukshi, gcm.notification.USER_FCM_DEVICE_ID=fXLDo7zU7c0:APA91bFx0sIGwIZ9jIm7xi7QvSrWKrL29uWJnNT0jujlyVHTScUteuRZ37nB-FgEeBXokZdQfmyGKhhRLjCILraS8sTif4p6DRJ_jZkNlh-J_yhKTAU3WnBYzGBtlaTorcAJhDtd1AIy, gcm.notification.CHAT_KEY=-L-FVx8eZBuz-QIsnXvx, from=1028795933953, gcm.notification.USER_EMAIL=ishkumihu@gmail,com, google.message_id=0:1512190657780774%bfd1fc79bfd1fc79, gcm.notification.MSG_KEY=messageKey, gcm.notification.MSG=, gcm.notification.USER_FCM_DEVICE_ID_SENDER=AAAA74kEJQE:APA91bHN5lJf0S8KNXzhU4XL1rz1rqyZ6ziY4UghZudtW6iH84ytQksWMSvSKsaBqQEsw7P2txk-yTGp5DOYElb7pdg8VFgj8wecJUcsPKJ6JCASCO_ihXh6xpo3a2aDuw8HnHPvL0Mr, collapse_key=com.sukshi.sukshichat}]

Actually gcm.notification appending each key also should not come , I don't know why that's coming.

What is the error you get? You want to convert your remote message into JSONObject? You actually don't need this, you can get the value of JSON in this case also? — Oguz Ozcan, Dec 02 '17 at 06:03
But the data I ma getting is in JSONSTRING format. How can i get values of json from jsonstring? — Stackover67, Dec 02 '17 at 06:05
You need to have the JSON or you only need the values. `String userName = data.get(Constants.KEY_USER_DISPLAY_NAME.name()).toString()` this might work for you? — Oguz Ozcan, Dec 02 '17 at 06:07
Please print remoteMessge#getData() and add output to question, so that we can see what type of data you're receiving. If it's a json string, you can convert it into JSON Object by using : JSONObject jsonObj = new JSONObject(jsonStr); — dpaksoni, Dec 02 '17 at 06:24
@dpaksoni I edited the que with my output. Please have a look at it. — Stackover67, Dec 02 '17 at 06:46

score 3 · Answer 1 · answered Dec 02 '17 at 07:10

3

Actually you're getting Map object from RemoteMessage#getData() method. So if you need a json object, what you can do is create it on your own like below

JSONObject json = new JSONObject();
//data is RemoteMessage#getData();
Set<String> keys = data.keySet();
for (String key : keys) {
    try {
       json.put(key, JSONObject.wrap(data.get(key)));
    } catch(JSONException e) {
        //Handle exception here
  }
}

answered Dec 02 '17 at 07:10

dpaksoni

327
3
17

Please accept answer if it really solved your problem. – dpaksoni Dec 02 '17 at 08:28
By using this I get keys = 0 I am adding a pic of my output in the picture. – Stackover67 Dec 02 '17 at 11:25

AGM Tazim · Accepted Answer · 2017-12-02T17:43:11.237

2

Try with making JSONObject from string representation of json. Change you notification to data on server side code. Like -

fetch('https://fcm.googleapis.com/fcm/send', {
    'method': 'POST',
    'headers': {
      'Authorization': 'key=' + fromKey,
      'Content-Type': 'application/json'
    },
    'body': JSON.stringify({
      'data': notification,
      'to': toKey
    })
  }).then(function(response) {
    console.log(response);
  }).catch(function(error) {
    console.error(error);
  })
};

And get your fcm message on Android side -

String body = remoteMessage.getData();
JSONObject json = new JSONObject(body );
Log.d("json", json.toString());

Then you can get value by key assigned from javascript. Like - json.get("USER_DISPLAY_NAME");

And let me know how its going.

edited Dec 02 '17 at 17:43

answered Dec 02 '17 at 07:18

AGM Tazim

2,213
3
16
25

Attempt to invoke virtual method 'java.lang.String com.google.firebase.messaging.RemoteMessage$Notification.getBody()' on a null object reference This is the error I am getting if I implement your way. – Stackover67 Dec 02 '17 at 11:15
can you post what `remoteMessage.getNotification()` with `toString()` gives? – AGM Tazim Dec 02 '17 at 14:41
is it possible to connect with you personally? Like on skype or hangouts? I've been struggling with this problem for the last 3 days – Stackover67 Dec 02 '17 at 15:19

Parse a Bundle which is a JSONString in Remotemessage to JSON object

2 Answers2