public void sendSMS(String phoneNumber, String message)
    {        
        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);
//---when the SMS has been sent---
        registerReceiver(
new BroadcastReceiver(){
@Override
public void onReceive(Context arg0, Intent arg1) {
switch (getResultCode())
                {
case Activity.RESULT_OK:
                        Toast.makeText(getBaseContext(), 
"SMS sent", 
                                Toast.
LENGTH_SHORT).show();
break;
case SmsManager.RESULT_ERROR_GENERIC_FAILURE:
                        Toast.makeText(getBaseContext(), 
"Your No. is not Register", 
                                Toast.
LENGTH_SHORT).show();
break;
case SmsManager.RESULT_ERROR_NO_SERVICE:
                        Toast.makeText(getBaseContext(), 
"No service", 
                                Toast.
LENGTH_SHORT).show();
break;
case SmsManager.RESULT_ERROR_NULL_PDU:
                        Toast.makeText(getBaseContext(), 
"Null PDU", 
                                Toast.
LENGTH_SHORT).show();
break;
case SmsManager.RESULT_ERROR_RADIO_OFF:
                        Toast.makeText(getBaseContext(), 
"Radio off", 
                                Toast.
LENGTH_SHORT).show();
break;
                }
            }
        }, 
new IntentFilter(SENT));
//---when the SMS has been delivered---
        registerReceiver(
new BroadcastReceiver(){
@Override
public void onReceive(Context arg0, Intent arg1) {
switch (getResultCode())
                {
case Activity.RESULT_OK:
                        Toast.makeText(getBaseContext(), 
"SMS delivered", 
                                Toast.
LENGTH_SHORT).show();
break;
case Activity.RESULT_CANCELED:
                        Toast.makeText(getBaseContext(), 
"SMS not delivered", 
                                Toast.
LENGTH_SHORT).show();
break;                        
                }
            }
        }, 
new IntentFilter(DELIVERED));        
        SmsManager sms = SmsManager.getDefault();
        sms.sendTextMessage(phoneNumber, 
null, message, sentPI, deliveredPI);        
}