Android create notification with proper channel

 void showNotification(String title, String message) {
        NotificationManager mNotificationManager =
                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
            NotificationChannel channel = new NotificationChannel("channel_1",
                    "Channel_1",
                    NotificationManager.IMPORTANCE_DEFAULT);
            channel.setDescription(message);
            mNotificationManager.createNotificationChannel(channel);
        }
        NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(getApplicationContext(), "channel_1")
                .setSmallIcon(R.drawable.ic_baseline_facebook_24) // notification icon
                .setContentTitle(title) // title for notification
                .setContentText(message)// message for notification
                .setAutoCancel(true); // clear notification after click
        Intent intent = new Intent(getApplicationContext(), HomeActivity.class);
        PendingIntent pi = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
        mBuilder.setContentIntent(pi);
        mNotificationManager.notify(0, mBuilder.build());
    }