Unable to send sms using SMSManager in Android

In my application I do not want to use the default message sender. For doing that I followed the following link In Android is it possible to send sms message to more than one recipient in code?

• And that code worked too. But the messages I am sending from this code are not saved on the phones outbox and inbox.

• I am using sms manager like this in my code

  SmsManager sms = SmsManager.getDefault(); sms.sendTextMessage(phoneNumber, null, message, null, null);

But it is not sending sms.please help me with how can i send sms in android - i have tried following too PendingIntent sentPI = PendingIntent.getBroadcast(this, 0, new Intent( SENT), 0);

PendingIntent deliveredPI = PendingIntent.getBroadcast(this, 0,
new Intent(DELIVERED), 0);
SmsManager sms = SmsManager.getDefault();
sms.sendTextMessage(phoneNumber, null, message, sentPI, deliveredPI);

It's also not working.
SMSAPPActivity.java

EDIT :

btnSendSMS.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                String message = txtMessage.getText().toString();
                String[] PhnNoArray = new String[2];
                PhnNoArray[0] = "9999999999";
                PhnNoArray[1] = "8888888888";
                // StringTokenizer st = new StringTokenizer(phoneNo, ",");
                smsManager = SmsManager.getDefault();
                for (int i = 0; i < PhnNoArray.length; i++) {
                    smsManager = SmsManager.getDefault();
                        // this is the function that does all the magic
//                      sms.sendTextMessage(phoneNumber, null, msg, pi, null);
                    smsManager.sendTextMessag