Notification Channel code

NotificationChannel.java

private final static String manasia_notification_channel = "Manasia Event Reminder";

// Create the NotificationChannel, but only on API 26+ because
// the NotificationChannel class is new and not in the support library
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
  //define the importance level of the notification
  int importance = NotificationManager.IMPORTANCE_DEFAULT;

  //build the actual notification channel, giving it a unique ID and name
  NotificationChannel channel = 
    new NotificationChannel(manasia_notification_channel, manasia_notification_channel, importance);

  //we can optionally add a description for the channel
  String description = "A channel which shows notifications about events at Manasia";
  channel.setDescription(description);
  
  //we can optionally set notification LED colour
  channel.setLightColor(Color.MAGENTA);

  // Register the channel with the system
  NotificationManager notificationManager = (NotificationManager) getApplicationContext().
    getSystemService(Context.NOTIFICATION_SERVICE);
  if (notificationManager != null) {
    notificationManager.createNotificationChannel(channel);
  }
}