Datepicker problem by using Java code but no problems if using XML parsing

Question

Hello all,

It is so strange that there is problem when I implement the same Datepicker method on Java code not XML.

XML CODE approach:

public class DateActivity extends Activity implements OnClickListener
{
   private static final int DATE_ID=0;

   public void onCreate(Bundle savedInstanceState) 
   {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.mylayout);

    dateButton = (Button) findViewById(R.id.dateButton);    
    dateButton.setOnClickListener(this)

   }

    public void onClick(View v) 
    {
          case R.id.dateButton:
            showDialog(DATE_ID);
        break;
    }

            @Override
            protected Dialog onCreateDialog(int id) 
            {
                Calendar cal = Calendar.getInstance();
                int calyear = cal.get(Calendar.YEAR);
                int calmonth = cal.get(Calendar.MONTH);
                int calday = cal.get(Calendar.DAY_OF_MONTH);

                switch (id) 
                {
                    case DATE_ID:
                       return new DatePickerDialog(this,  mDateSetListener,  calyear, calmonth, calday);
                }
                    return null;
            }

            private DatePickerDialog.OnDateSetListener mDateSetListener = new DatePickerDialog.OnDateSetListener() 
            {
                public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) 
                {
                   chosenDate = incomehelper.getSelectedDate(dayOfMonth,monthOfYear,year);
                   Toast.makeText(DateActivity.this, "Date Selected is ="+chosenDate, Toast.LENGTH_SHORT).show();
                }
            };

}

JAVA code approach:

public class IncomeLayout extends Activity implements TabHost.TabContentFactory, OnClickListener
{
    private Activity activity;  
    private LayoutInflater inflaterHelper; 
    private LinearLayout layout;
    private static final String tab1 = "something";
    private static final String tab2 = "otherthing";
    private Button dateButton = null;
    private static final int DATE_ID = 0;

    public IncomeLayout(Activity a)
    {
       activity = a;
       inflaterHelper = a.getLayoutInflater();

    }

    public View createTabContent(String tag) 
    {  
         return addCustomView(tag);
    }  

    public View addCustomView(String id)
    {
     layout = new LinearLayout(activity);  
         layout.setOrientation(LinearLayout.VERTICAL);

     if(id.equals(tab1))
        { 
       dateButton = new Button(activity);
       dateButton.setText("Choose Date");
       dateButton.setId(R.id.dateButton);
layout.addView(dateButton,
                    new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT,
                                                  LinearLayout.LayoutParams.WRAP_CONTENT));
        dateButton.setOnClickListener(this);
    }

        else if (id.equals(tab2))
        {

        }
       return layout;
         }

public void onNothingSelected(AdapterView<?> parentView) 
    {

    }


    public void onClick(View v) 
    {
    switch (v.getId())
    case R.id.dateButton:
          showDialog(DATE_ID);
          break;
        }   

            @Override
            protected Dialog onCreateDialog(int id) 
            {
                Calendar cal = Calendar.getInstance();
                int calyear = cal.get(Calendar.YEAR);
                int calmonth = cal.get(Calendar.MONTH);
                int calday = cal.get(Calendar.DAY_OF_MONTH);

                switch (id) 
                {
                    case DATE_ID:
                       return new DatePickerDialog(activity,  mDateSetListener,  calyear, calmonth, calday);
                }
                    return null;
            }

            private DatePickerDialog.OnDateSetListener mDateSetListener = new DatePickerDialog.OnDateSetListener() 
            {
                public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) 
                {
                   chosenDate = incomehelper.getSelectedDate(dayOfMonth,monthOfYear,year);
                   Toast.makeText(IncomeLayout.this, "Date Selected is ="+chosenDate, Toast.LENGTH_SHORT).show();
                }
            };       


}

I have xml to define the id, so I obtain those id and setid to widget on the fly. The problem is on Datepicker method, but if I use xml to create widget, that is no problem. But my program requires widget creation dynamically.

Anyone has similar situation and problem ? It seems that it is unable to get the Calendar year/month/date for Java code method.

Thanks for sharing !!

Tom