Useful information for GCM 3.0 notifications that do not display an Android notification when the application is in the foreground

Question

When I send a gcm message with useful information with a notification (no data), an Android notification is only displayed if my application is in the background. If the application is in the foreground, an Android notification is not displayed, but the onMessageReceived () function in the GcmListenerService is called with a null "message".

onMessageReceived () is not called when the application is in the background, and an Android notification is displayed as expected.

Is this the expected behavior or am I missing something? Please let me know if any client-side code is required.

Here is the server side code snippet:

Message.Builder messageBuilder = new Message.Builder();
messageBuilder.notification(new Notification.Builder("ic_launcher")
.clickAction("ScrHome1")
.title("Bling")
.body(blingNotification.getPayload().getValue())
.build());
Message message = messageBuilder.build();
sender.send(message, targetIdList, retries);

UPDATE

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public class GcmSender {

public static final String API_KEY = "AIaSyCMzWOageHbcX9yxNtfL6RygdbLT-7Ls";

@SuppressWarnings("unchecked")
public static void main(String[] args) {

    try {
        // Prepare JSON containing the GCM message content. What to send and where to send.
        JSONObject jGcmData = new JSONObject();
        JSONObject jData = new JSONObject();
        JSONObject jNotification = new JSONObject();
        jData.put("message", "hello");
        jNotification.put("body", "hi dev");
        jNotification.put("title", "POC");
        jNotification.put("icon", "ic_launcher");
        // Where to send GCM message.
        jGcmData.put("to",
                "eucb9MGv3g:APA91bGJWZjBET12nYuDrX8yiylPqt3uy87ThP2f4E9Nw89GOvbZkWSTFVPyQ8keTPQubWzpW_10-Aydqu04MD1GvzeTUAh6SoFk6qeXSUW0205h6sbQdTe74VZfMu8t2P9nrWOE");
        // What to send in GCM message.
        jGcmData.put("notification", jNotification);

        // Create connection to send GCM Message request.
        URL url = new URL("https://android.googleapis.com/gcm/send");
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setRequestProperty("Authorization", "key=" + API_KEY);
        conn.setRequestProperty("Content-Type", "application/json");
        conn.setRequestMethod("POST");
        conn.setDoOutput(true);

        // Send GCM message content.
        OutputStream outputStream = conn.getOutputStream();
        outputStream.write(jGcmData.toString().getBytes());

        // Read GCM response.
        InputStream inputStream = conn.getInputStream();
        String resp = IOUtils.toString(inputStream);
        System.out.println(resp);
        System.out.println("Check your device/emulator for notification or logcat for "
                + "confirmation of the receipt of the GCM message.");
    } catch (IOException e) {
        System.out.println("Unable to send GCM message.");
        System.out.println("Please ensure that API_KEY has been replaced by the server "
                + "API key, and that the device registration token is correct (if specified).");
        e.printStackTrace();
    }
}

}

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Answer 1

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Answer 2

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BroadcastReceiver mRegistrationBroadcastReceiver;

private void setUpBroadcastReceiver() {

    mRegistrationBroadcastReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {

            //create notification
        }
    };
}