Anyone managed to complete the extra credit (A Model User) for the Android Model-View-Controller Pattern section?

public class MyActivity extends Activity {

    //SETUP VARIABLES FOR DETAILS
    private EditText mUsername;
    private EditText mRealName;
    private EditText mAge;
    //private RadioGroup mSex;
    private EditText mLocation;
    private Button mSubmitButton;

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

        mUsername = (EditText)findViewById(R.id.usernameEditText);
        mRealName = (EditText)findViewById(R.id.realnameEditText);
        mAge = (EditText)findViewById(R.id.ageEditText);
        mLocation = (EditText)findViewById(R.id.locationEditText);
        mSubmitButton = (Button)findViewById(R.id.submitButton);

        //SETUP ON CLICK LISTENER FOR BUTTON
        mSubmitButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

            }
        });
    }

public class UserDetail {
    //Setting all the attributes as variables for user details to be collected
    private String mUsername;
    private String mRealName;
    private int mAge;
    //private RadioGroup mSex;
    private String mLocation;

    //Set custom constructor to hold all variables for each user
    public UserDetail(String username, String realName, int age, String location){
       mUsername = username;
       mRealName = realName;
       mAge = age;
       mLocation = location;
    }

    //Using Code, generate - to autocode getters and setters

    public String getUsername() {
        return mUsername;
    }

    public void setUsername(String username) {
        mUsername = username;
    }

    public String getRealName() {
        return mRealName;
    }

    public void setRealName(String realName) {
        mRealName = realName;
    }

    public int getAge() {
        return mAge;
    }

    public void setAge(int age) {
        mAge = age;
    }

    /*public ToggleButton getSex() {
        return mSex;
    }

    public void setSex(ToggleButton sex) {
        mSex = sex;
    }*/

    public String getLocation() {
        return mLocation;
    }

    public void setLocation(String location) {
        mLocation = location;
    }
}