If you want to create sms delivery app you can use my below code. In the below code I have used Intent , PandingIntent and Broadcastreceiver. In the below code I have also used Toast function to deliver SMS notification. See the below example it will clearly described how to make sent sms confirmation app.

public class MainActivity extends Activity {
 Button btnSend;
 EditText etPhoneNo;
 EditText etMsg;

  @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  etPhoneNo = (EditText) findViewById(R.id.phno);
  etMsg = (EditText) findViewById(R.id.smstxt);
  btnSend = (Button) findViewById(R.id.send);

   btnSend.setOnClickListener(new OnClickListener() {
   @Override
   public void onClick(View v) {
    String phoneNo = etPhoneNo.getText().toString();
    String msg = etMsg.getText().toString();
    try {

      String SENT = "sent";
     String DELIVERED = "delivered";

      Intent sentIntent = new Intent(SENT);
     /*Create Pending Intents*/
     PendingIntent sentPI = PendingIntent.getBroadcast(
       getApplicationContext(), 0, sentIntent,
       PendingIntent.FLAG_UPDATE_CURRENT);

      Intent deliveryIntent = new Intent(DELIVERED);

      PendingIntent deliverPI = PendingIntent.getBroadcast(
       getApplicationContext(), 0, deliveryIntent,
       PendingIntent.FLAG_UPDATE_CURRENT);
     /* Register for SMS send action */
     registerReceiver(new BroadcastReceiver() {

       @Override
      public void onReceive(Context context, Intent intent) {
       String result = "";

        switch (getResultCode()) {

        case Activity.RESULT_OK:
        result = "Transmission successful";
        break;
       case SmsManager.RESULT_ERROR_GENERIC_FAILURE:
        result = "Transmission failed";
        break;
       case SmsManager.RESULT_ERROR_RADIO_OFF:
        result = "Radio off";
        break;
       case SmsManager.RESULT_ERROR_NULL_PDU:
        result = "No PDU defined";
        break;
       case SmsManager.RESULT_ERROR_NO_SERVICE:
        result = "No service";
        break;
       }

        Toast.makeText(getApplicationContext(), result,
         Toast.LENGTH_LONG).show();
      }

      }, new IntentFilter(SENT));
     /* Register for Delivery event */
     registerReceiver(new BroadcastReceiver() {

       @Override
      public void onReceive(Context context, Intent intent) {
       Toast.makeText(getApplicationContext(), "Deliverd",
         Toast.LENGTH_LONG).show();
      }

      }, new IntentFilter(DELIVERED));

      /*Send SMS*/
     SmsManager smsManager = SmsManager.getDefault();
     smsManager.sendTextMessage(phoneNo, null, msg, sentPI,
       deliverPI);
    } catch (Exception ex) {
     Toast.makeText(getApplicationContext(),
       ex.getMessage().toString(), Toast.LENGTH_LONG)
       .show();
     ex.printStackTrace();
    }
   }
  });

  }

  @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  // Inflate the menu; this adds items to the action bar if it is present.
  getMenuInflater().inflate(R.menu.activity_main, menu);
  return true;
 }

}