## * Notification channel groups *
- Notification channels let us bundle together notification channels - Beneficial where we find ourselves using the same notification channels in several places in our app. - Example use case: - our app supports both a personal account and a business account - both account types have identical notification channels; - A personal user account including 2 notification channels: - Notifications of new comments on your posts. - Notifications recommending posts by your contacts. - A business user account including 2 notification channels: - Notifications of new comments on your posts. - Notifications recommending posts by your contacts. - In the above use case it makes sense to use notification channel groups - To create a notification channel group:
```java // The id of the group. String group = "my_group_01";
// The user-visible name of the group. CharSequence name = getString(R.string.group_name);
NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
mNotificationManager.createNotificationChannelGroup(new NotificationChannelGroup(group, name)); ``` - Once you've created a new group you can call `setGroup()` to associate a new channel with the group. - You can only modify the association between notification channel and group before you submit the channel to the notification manager.
- To create a batch of notification groups by using the `createNotificationChannelGroups()` method, we can pass in a List of NotificationChannelGroup instances for the groups we wish to create:
```java NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
List<NotificationChannelGroup> notificationChannelGroups = new ArrayList(); notificationChannelGroups.add(new NotificationChannelGroup("group_one", "Group One")); notificationChannelGroups.add(new NotificationChannelGroup("group_two", "Group Two")); notificationChannelGroups.add(new NotificationChannelGroup("group_three", "Group Three"));
notificationManager.createNotificationChannelGroup(notificationChannelGroups); ``` |
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