Android NotificationChannels Sample (Kotlin)

Demonstration of using channels to categorize notifications by topic. This feature was added in Android O, and allows users to have fine-grained control over their notification preferences.


Android O introduces notification channels to provide a unified system to help users manage notifications. When you target Android O, you must implement one or more notification channels to display notifications to your users.

You can create a notification channel for each distinct type of notification you need to send. You can also create notification channels to reflect choices made by users of your app. For example, you might setup separate notification channels for each conversation group created by a user in a messaging app.

To create a channel, call [NotificationManager.createNotificationChannels()][1]. You can then use [Notification.Builder.setChannel()][2] to assign your notification to that channel.

Users can now manage most of the settings associated with notifications using a consistent system UI. All notifications posted to a notification channel behave the same. To access the settings screen, use the ACTION_CHANNEL_NOTIFICATION_SETTINGS intent:

Intent intent = new Intent(Settings.ACTION_CHANNEL_NOTIFICATION_SETTINGS);
intent.putExtra(Settings.EXTRA_CHANNEL_ID, mChannel.getId());
intent.putExtra(Settings.EXTRA_APP_PACKAGE, getPackageName());


  • Android SDK Preview O
  • Android Build Tools v25.0.3
  • Android Support Repository


Getting Started

This sample uses the Gradle build system. To build this project, use the “gradlew build” command or use “Import Project” in Android Studio.


If you've found an error in this sample, please file an issue:

Patches are encouraged, and may be submitted by forking this project and submitting a pull request through GitHub. Please see for more details.


Copyright 2017 The Android Open Source Project, Inc.

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