1. 1. 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:

```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[]

);
notificationManager.createNotificationChannel(notificationChannel);
```

• 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