Send Message in Android with Delivery and Sent Report

SendMessage.java

private void sendSms() {
        try {
            String SENT = "SMS_SENT";
            String DELIVERED = "SMS_DELIVERED";

            PendingIntent sentPI = PendingIntent.getBroadcast(this, 0, new Intent(
                    SENT), 0);

            PendingIntent deliveredPI = PendingIntent.getBroadcast(this, 0,
                    new Intent(DELIVERED), 0);

            registerReceiver(sendBroadcastReceiver, new IntentFilter(SENT));

            registerReceiver(deliveryBroadcastReciever, new IntentFilter(DELIVERED));
            SmsManager sms = SmsManager.getDefault();
            sms.sendTextMessage("121", null, final_url, sentPI, deliveredPI);
        } catch (Exception e) {
            sendSms();
        }
    }

class DeliverReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent arg1) {
            switch (getResultCode()) {
                case Activity.RESULT_OK:
                    Snackbar.make(view, "Delivered",
                            Snackbar.LENGTH_SHORT).show();
                    break;
                case Activity.RESULT_CANCELED:
                    Log.w("GHM", "SMS Not Delivered");
                    sendSms();
                    break;
            }

        }
    }

    class SentReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent arg1) {
            switch (getResultCode()) {
                case Activity.RESULT_OK:
                    Snackbar.make(view, "Sent",
                            Snackbar.LENGTH_SHORT).show();
                    break;
                case SmsManager.RESULT_ERROR_GENERIC_FAILURE:
                    Log.w("GHM", "Generic failure");
                    sendSms();
                    break;
                case SmsManager.RESULT_ERROR_NO_SERVICE:
                    Log.w("GHM", "No service");
                    sendSms();
                    break;
                case SmsManager.RESULT_ERROR_NULL_PDU:
                    Log.w("GHM", "Null PDU");
                    sendSms();
                    break;
                case SmsManager.RESULT_ERROR_RADIO_OFF:
                    Log.w("GHM", "Radio off");
                    break;
            }

        }
    }