passing selected checkbox string to json android

I have two checkboxes

Customer, Employee

When the appropriate checkbox is checked by clicking on login button

based on the checkbox selection either Customer or Employee passed to json parser

so that along with username and password the role(Customer or Employee)of user should be compared with the mysql database with help of php

I have already implemented and tested Backend(html,php and myql)

 CheckBox Customer, Employee;
 uname = (EditText)findViewById(R.id.uname1);
 upass = (EditText)findViewById(R.id.upassword1);
 Customer = (CheckBox)findViewById(R.id.customer);
 Employee = (CheckBox)findViewById(R.id.employee);
 login = (Button)findViewById(R.id.login);