Saving Values to a database

I am trying to make an app for a restaurant. I have set up a local database and have a prepared statement to save a users username and password to enable them to log into the system, but it does not seem to work. The username and passwords are not saving. Below is my code, if anyone has any solutions, i would greatly appreciate it.

public class register extends AppCompatActivity {

EditText username, password;
Button registartion;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_register);
}

private Connection getConnection()
{

    String host = "jdbc:mysql://jdbc.fmc.me.uk:3306/db_ben";
    String u = "user_ben";
    String p = "******";
    try
    {
        Connection con = DriverManager.getConnection(host, u, p);
        return con;
    } catch (SQLException e)
    {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return null;
}

private boolean registerUser(){

    //Get username
    EditText regUsernameBox = (EditText) findViewById(R.id.RegUsername);
    String regUsernameStr = regUsernameBox.getText().toString();

    //Get password
    EditText regPasswordBox = (EditText) findViewById(R.id.RegPassword);
    String regPasswordStr = regPasswordBox.getText().toString();

    System.out.println(regUsernameStr);
    System.out.println(regPasswordStr);

    int i = 0;
    Connection con = getConnection();
    try {
        PreparedStatement pst = con.prepareStatement("insert into users values(?,?)");
        pst.setString(1, regUsernameStr);
        pst.setString(2,regPasswordStr);
        i = pst.executeUpdate();
    } catch (SQLException e) {
        e.printStackTrace();
    }
    if(i>0)
        return true;
    return false;
}

public void buttonClick() {
    final Button registerUsers = (Button) findViewById(R.id.bRegister);

    registerUsers.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            registerUser();
        }
    });
}
}