Firebasemessagingservice: No Notifications When Phone Is Sleeping

I am using FirebaseMessagingService. I am sending some notifications with the server. However, these notifications do not come when the phone's screen is turned off for a while, or

Solution 1:

You need to take a look at these:

1. https://firebase.google.com/docs/cloud-messaging/concept-options#setting-the-priority-of-a-message
2. https://developer.android.com/training/monitoring-device-state/doze-standby

Solution 2:

To make firebase library to call your onMessageReceived() in the following cases

• App in foreground
• App in background
• App has been killed

You must not use the notification property as seen here:

{
   "to": "/topics/journal",
   "notification": {
   "title" : "title",
   "text": "data!",
   "icon": "ic_notification"
    }
}

But instead, bundle it as a data FCM - which lets the device handle it directly.

{
  "to": "/topics/dev_journal",
   "data": {
       "text":"text",
       "title":"",
       "line1":"Journal",
       "line2":"some data"
   }
} 

The message is sent in the argument RemoteMessage along with your data object as Map<String, String> of which you can manage within your app's onMessageReceived().

Solution 3:

If messages should appear when the device is in the doze mode, the messages must have set a high priority. Messages sent with 'normal' priority don't come when your phone is in doze mode. Here is a possible solution that worked for me:

privatevoidforwardMessageToFCM(String notificationMessage, boolean highPriority) {
    Message message;
    if (highPriority) {
        message = createFCMMessageWithHighPriority(notificationMessage + APPEND_FCM_NOTIFICATION_MESSAGE);
    } else {
        message = createFCMMessageWithNormalPriority(notificationMessage + APPEND_FCM_NOTIFICATION_MESSAGE);
    }

    try {
        firebaseMessaging.send(message);
        printInfo("Sent message to FCM: " + notificationMessage);
    } catch (FirebaseMessagingException e) {
        printException(e);
        return;
    }
}

privateMessagecreateFCMMessageWithNormalPriority(String notificationMessage) {
    returnMessage.builder().setNotification(createFCMNotification(notificationMessage)).setToken(registrationToken)
            .setAndroidConfig(createAndroidConfigWithNormalMessagePriority()).build();
}

privateMessagecreateFCMMessageWithHighPriority(String notificationMessage) {
    returnMessage.builder().setNotification(createFCMNotification(notificationMessage)).setToken(registrationToken)
            .setAndroidConfig(createAndroidConfigWithHighMessagePriority()).build();
}

privateAndroidConfigcreateAndroidConfigWithHighMessagePriority() {
    returncreateAndroidConfigWithPriority(Priority.HIGH);
}

privateAndroidConfigcreateAndroidConfigWithNormalMessagePriority() {
    returncreateAndroidConfigWithPriority(Priority.NORMAL);
}

privateAndroidConfigcreateAndroidConfigWithPriority(Priority priority) {
    returnAndroidConfig.builder().setPriority(priority).build();
}

privateNotificationcreateFCMNotification(String notificationMessage) {
    returnNotification.builder().setBody(notificationMessage).setTitle(NOTIFICATION_CONTENT_TITLE).build();
}

Use createFCMMessageWithHighPriority-method in order to create a notification message with high priority. But according to doc, this should only used for important messages. Further info about priorities: https://firebase.google.com/docs/cloud-messaging/concept-options#setting-the-priority-of-a-message