Android: Multiple Notifications as single list in Status Bar

Question

I am trying to `Notify` user based on some criteria. `Multiple Notifications` are being shown in `Status Bar` but I want to `Group the notification in single notification` and when user clicks in the `Status Bar`, I want to retrieve all notifications in that group. Is that possible? Or I have to maintain `PendingIntents` of those notifications? Any help will be appreciated. For example, if birthdays of two friends come on same day, then 2 notifications should be shown. I want to combine these notifications i.e. instead of 2 notifications in the status bar, I want one, when user clicks on it, it should have information about 2 notifications. Is it possible? Please see the code below for displaying notifications. ``` public void displayNotification(BirthdayDetail detail) { NotificationCompat.Builder builder = new NotificationCompat.Builder(this.context); builder.setSmallIcon(R.drawable.ic_launcher); builder.setContentTitle(detail.getContactName()); builder.setContentText(detail.getConta…

Accepted Answer

When you need to issue a notification multiple times for the same type of event, you should avoid making a completely new notification. Instead, you should consider updating a previous notification, either by changing some of its values or by adding to it, or both.

You can use something like:

```
mNotificationManager =
        (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
// Sets an ID for the notification, so it can be updated
int notifyID = 1;
mNotifyBuilder = new NotificationCompat.Builder(this)
    .setContentTitle("New Message")
    .setContentText("You've received new messages.")
    .setSmallIcon(R.drawable.ic_notify_status)
numMessages = 0;
// Start of a loop that processes data and then notifies the user
...
    mNotifyBuilder.setContentText(currentText)
        .setNumber(++numMessages);
    // Because the ID remains unchanged, the existing notification is
    // updated.
    mNotificationManager.notify(
            notifyID,
            mNotifyBuilder.build());
```

Source: http://developer.android.com/training/notify-user/managing.html

Android: Multiple Notifications as single list in Status Bar

Solution

Problem