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<li>Notification channel groups</li>
</ol> </li>
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<ul class="alternate" type="square">
<li>Notification channels let us bundle together notification channels</li>
<li>Beneficial where we find ourselves using the same notification channels in several places in our app.</li>
<li>Example use case:</li>
<li>our app supports both a personal account and a business account</li>
<li>both account types have identical notification channels;</li>
<li>A personal user account including 2 notification channels:</li>
<li>Notifications of new comments on your posts.</li>
<li>Notifications recommending posts by your contacts.</li>
<li>A business user account including 2 notification channels:</li>
<li>Notifications of new comments on your posts.</li>
<li>Notifications recommending posts by your contacts.</li>
<li>In the above use case it makes sense to use notification channel groups</li>
<li>To create a notification channel group:</li>
</ul> <p style="margin: 10px 0 0 0">```java<br> // The id of the group.<br> String group = "my_group_01";</p> <p style="margin: 10px 0 0 0">// The user-visible name of the group.<br> CharSequence name = getString(R.string.group_name);</p> <p style="margin: 10px 0 0 0">NotificationManager mNotificationManager =<br> (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);</p> <p style="margin: 10px 0 0 0">mNotificationManager.createNotificationChannelGroup(new NotificationChannelGroup(group, name));<br> ```</p>
<ul class="alternate" type="square">
<li>Once you've created a new group you can call `setGroup()` to associate a new channel with the group.</li>
<li>You can only modify the association between notification channel and group before you submit the channel to the notification manager.</li>
</ul>
<ul class="alternate" type="square">
<li>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:</li>
</ul> <p style="margin: 10px 0 0 0">```java<br> NotificationManager notificationManager =<br> (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);</p> <p style="margin: 10px 0 0 0">List<NotificationChannelGroup> notificationChannelGroups = new ArrayList();<br> notificationChannelGroups.add(new NotificationChannelGroup("group_one", "Group One"));<br> notificationChannelGroups.add(new NotificationChannelGroup("group_two", "Group Two"));<br> notificationChannelGroups.add(new NotificationChannelGroup("group_three", "Group Three"));</p> <p style="margin: 10px 0 0 0">notificationManager.createNotificationChannelGroup(notificationChannelGroups);<br> ```</p> </td>
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