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I want to display a group notification instead of multiple notifications like whatsapp does. For eg: One notification with message - "2 discussions 1 comment" instead of total three notifications.

I used react-native-fcm library (https://github.com/evollu/react-native-fcm) I used group & tag keys but couldn't achieve the result as below code 

FCM.presentLocalNotification({
  title: 'Title',
  body: 'Body',
  priority: "high",
  click_action: true,
  show_in_foreground: true,
  local: true,
  group: 'group1',
  tag: 'tag1'
});

Is it possible to achieve this functionality in react native FCM? Please let me know.

Scath
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Md Saddam
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  • Do you use Android 7.0 or newer? Cause groups are not supported on the lower versions. You can read how to achieve the same result on older versions here: https://developer.android.com/training/notify-user/group#set_a_group_summary – Orest Savchak Jul 12 '18 at 14:31

1 Answers1

0

The project react-native-fcm is moved under react-native-firebase and there is a solution under this issue on the project.

The main idea:

The trick is to create an additional notification that will contain the notifications for that group.

// ID for grouping notifications, always the same
const SUMMARY_ID = `${ALERTS_GROUP}.summary`

const sendIt = (notification: Firebase.notifications.Notification) => {
  return firebase.messaging().hasPermission().then((yes) => {
    if (yes) {
      try {
        return firebase.notifications().displayNotification(notification)
          .catch((err) => {
            Log.e(`[sendNotification] ERROR: ${err}`)
            return Promise.resolve()
          })
      } catch (err) {
        Log.e('[sendNotification] Error displaying notification: ' + err)
      }
    }
    return Promise.resolve()
  })
}

const sendSummary = (data: MessageData) => {
  const summary = new firebase.notifications.Notification()
    .setNotificationId(SUMMARY_ID)
    .setTitle(_T('notification.channels.alert.description'))
    .setData(data)
    .android.setAutoCancel(true)
    .android.setCategory(firebase.notifications.Android.Category.Message)
    .android.setChannelId(getChannelId(MsgType.Alert))
    .android.setColor(variables.scheme.primaryColor)
    .android.setSmallIcon(STATUS_ICON)
    .android.setGroup(ALERTS_GROUP)
    .android.setGroupSummary(true)
    .android.setGroupAlertBehaviour(firebase.notifications.Android.GroupAlert.Children)
  sendIt(summary)
}

/**
 * Called by `bgMessaging` or the `onMessage`  handler.
 */
export function sendNotification (message: Firebase.messaging.RemoteMessage) {
  const payload: MessagePayload = message.data as any || {}
  const notification = new firebase.notifications.Notification()
  // ... more code

  if (Platform.OS === 'android' && Platform.Version >= 24) {
    notification.android.setGroup(ALERTS_GROUP)
    sendSummary(notification.data)
  }
  Log.v('[sendSummary] sending notification.')
  return sendIt(notification)
}
mico
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