*Creating a notification channel*
- Creating notification channels are done creating a [NotificationChannel| https://developer.android.com/reference/android/app/NotificationChannel.html#enableLights%28boolean%29] instance, configuring it, and passing it into createNotificationChannel() from the Notification manager:
``` {code: java }
NotificationManager notificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
String channelId = "some_channel_id";
CharSequence channelName = "Some Channel";
int importance = NotificationManager.IMPORTANCE_LOW;
NotificationChannel notificationChannel = new NotificationChannel(channelId, channelName, importance);
notificationChannel.enableLights(true);
notificationChannel.setLightColor(Color.RED);
notificationChannel.enableVibration(true);
notificationChannel.setVibrationPattern(new long[]{100, 200, 300, 400, 500, 400, 300, 200, 400});
notificationManager.createNotificationChannel(notificationChannel);
``` {code}
_+Some [NotificationChannel|https://developer.android.com/reference/android/app/NotificationChannel.html#enableLights%28boolean%29] methods available to us:+_
- `getId()` — Retrieve the ID of the given channel
- `enableLights() `— If the device in use supports notification lights, then this states whether or not this notification channel should show a light
- `setLightColor() `— If we decide that our channel supports notification lights, then this allows use to pass an int value that defines the color to be used for the notification light
- `enableVibration() `— State whether or not notifications from this channel should vibrate when shown on the device
- `setVibrationPattern()` — Set the vibration pattern to be used (long[]) if vibration is enabled for this notification channel
- `setImportance()` — Set the level of interruption for the given notification channel. This can be one of these importance values.
- `getImportance() `— Retrieve the importance value for the given notification channel
- `setSound() `— Provide a Uri for a sound to be played when a notification is posted to this channel
- `getSound() `— Retrieve the sound assigned to this notification
- `setGroup() `— Set the group in which the notification is assigned to
- `getGroup()` — Retrieve the group in which the notification has been assigned to
- `setBypassDnd() `— Set whether or not the notification should bypass Do Not Disturb mode (the INTERRUPTION_FILTER_PRIORITY value)
- `canBypassDnd()` — Retrieve whether or not the notification can bypass Do Not Disturb mode
- `getName() `— Retrieve the user visible name for the specified channel
- `setLockScreenVisibility()` — Set whether or not notifications from this channel should be displayed on the lock screen
- `getLockscreenVisibility() `— Retrieve whether or not notifications from this channel will appear on the lockscreen
- `getAudioAttributes() `— Retrieve the audio attributes for the sound which has been assigned to the corresponding notification channel
- `canShowBadge()` — Retrieve whether or not notifications from this channel are able to appear as badges within a launcher application |
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