onDateSet Event in aufrufender Methode abfangen

 //MainActivity.java
...
myButton.setOnClickListener(new View.OnClickListener() 
{
    @Override
     public void onClick(View view) 
    {
        Utils.showDatePickerDialog(view);
    }
});
  
  
 //Utils.java
public static void showDatePickerDialog(final View v)
{
    DatePickerDialog.OnDateSetListener setDateL = new DatePickerDialog.OnDateSetListener()
     {
        public void onDateSet(DatePicker view, int year, int month, int day)
        {
            System.out.println("You have set the date: " + day + "." + month + "." + year);
        }
    };
    final Calendar cal = Calendar.instance();
    Dialog newDialog = new DatePickerDialog(v.getContext(),
                                                    setDateL,
                                                    cal.get(Calendar.YEAR),
                                                    cal.get(Calendar.MONTH),
                                                    cal.get(Calendar.DAY_OF_MONTH));
    newDialog.show();
}

public interface MyOnDateSet {
 void onDateSet(DatePicker view, int year, int month, int day);
}

public static void showDatePickerDialog(final View v, final MyOnDateSet myOnDateSet) {

...
public void onDateSet(DatePicker view, int year, int month, int day)
        {
            if(myOnDateSet != null)
                myOnDateSet.onDateSet(view, year, month, day);
        }
...
}