doubt in Send mail

[Kishore1308]

I have to send a mail through android and to add a textview data in the place of "K". Kindly guide me

sender.sendMail("Unlock User Reg",
"Kidnly Unlock the below mentioned user id asap" + "\n" + "\n" + "K",
"XXXX@gmail.com",
"XXXX@gmail.com");
}