Android Oreo introduces several key updates to notifications, including notification channels and notification badges. Notification channels are collections of associated notifications. Each notification has a channel, and users can set preferences for each notification channel via the app’s settings.
Notification channels are especially important because they are required for all notifications on Android Oreo or your notifications won’t display!
Android Oreo also introduces Notification badges that appear on app icons in supported launchers to show the user that there are outstanding notifications.
To learn more about notification updates, check out the new notification documentation, sample and codelab in Java and Kotlin.
For a full list of changes in Android O, check out this video:
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