CODEWITHSUNDEEP
javafirebasefirebase-cloud-messaging
Moshe Gil
Moshe Gil

Reputation: 93

Firebase Cloud Messaging- Group of devices

I try to create a group of devices in Firebase Cloud Messaging and I got an ioexception "https://android.googleapis.com/gcm/googlenotification". I have several questions about it:

  1. What I need to put in fields: senderId, registrationId, idToken?
  2. How I change this part of code to create a group and not add to group?
  3. Where I need to put "authorization", "key=AIzaS..."?

Code:

public String addNotificationKey(
        String senderId, String userEmail, String registrationId, String idToken)
    throws IOException, JSONException {
    URL url = new URL("https://android.googleapis.com/gcm/googlenotification");
    HttpURLConnection con = (HttpURLConnection) url.openConnection();
    con.setDoOutput(true);

    // HTTP request header
    con.setRequestProperty("project_id", senderId);
    con.setRequestProperty("Content-Type", "application/json");
    con.setRequestProperty("Accept", "application/json");
    con.setRequestMethod("POST");
    con.connect();

    // HTTP request
    JSONObject data = new JSONObject();
    data.put("operation", "add");
    data.put("notification_key_name", userEmail);
    data.put("registration_ids", new JSONArray(Arrays.asList(registrationId)));
    data.put("id_token", idToken);

    OutputStream os = con.getOutputStream();
    os.write(data.toString().getBytes("UTF-8"));
    os.close();

    // Read the response into a string
    InputStream is = con.getInputStream();
    String responseString = new Scanner(is, "UTF-8").useDelimiter("\\A").next();
    is.close();

    // Parse the JSON string and return the notification key
    JSONObject response = new JSONObject(responseString);
    return response.getString("notification_key");

}

Upvotes: 0

Views: 236

Answers (2)

AL.
AL.

Reputation: 37778

  1. What I need to put in fields: senderId, registrationId, idToken?

See their definitions in Credentials.

Sender ID can be found in your Firebase Console. Go to Project Settings, then Cloud Messaging tab.

Registration token is generated on your client app side. See the corresponding setup documentation depending on the client app type here.

idToken is (AFAIK) only used on the client app side. See the (Android) documentation here.

  1. How I change this part of code to create a group and not add to group?

Change

data.put("operation", "add");

to

data.put("operation", "create");
  1. Where I need to put "authorization", "key=AIzaS..."?

See Puf's answer.

Upvotes: 0

Frank van Puffelen
Frank van Puffelen

Reputation: 598817

For #3: 

con.setRequestProperty("Authorization", "key=AIzaS...");

Upvotes: 1

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