Android : Send sms from mobile to mobile number stored accross a name in database in remote server

I have an android app which stores names, mobile number and email of a person in remote server mysql database. I have many such entries of different persons. I used a spinner to populate the names of all persons stored in the server. Now I want to send sms to the person whose name I select in the spinner ie. if I change the name in the spinner the mob number of the new name must be updated in a variable so that the sms goes to the new name selected in spinner. Please help me. Thanks in advance.