android 8.0 notification

public static void sendNotificationCompat(Context ctx, int id, String title, String body) {  sendNotificationCompat(ctx, id, title, body, null);}public static void sendNotificationCompat(Context ctx, int id, String title, String body, PendingIntent pendingIntent) {  Context context = App.get();  NotificationManager nm = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);  if (nm == null) {    return;  }  if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {    NotificationChannel notificationChannel = nm.getNotificationChannel(CHANNEL_ID);    if (notificationChannel == null) {      NotificationChannel channel = new NotificationChannel(CHANNEL_ID, CHANNEL_NAME, NotificationManager.IMPORTANCE_DEFAULT);      nm.createNotificationChannel(channel);    }  }  Notification.Builder builder = new Notification.Builder(ctx)      .setSmallIcon(R.mipmap.ic_launcher)      .setContentText(body)      .setAutoCancel(true)      .setTicker(body);  if (!TextUtils.isEmpty(title)) {    builder.setContentTitle(title);  }  if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {    builder.setChannelId(CHANNEL_ID);  }  if (pendingIntent != null) {    builder.setContentIntent(pendingIntent);  }  nm.notify(id, builder.build());}
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