无法更改datepickerdialog中的标题

Question

行。我花了好几个小时，我无法弄明白。我创建了一个单独的Class，它具有datepickerdialog片段，如下所示：

public abstract class DatePickerFragment extends DialogFragment implements
    DatePickerDialog.OnDateSetListener {

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {

    final Calendar c = Calendar.getInstance();
    int year = c.get(Calendar.YEAR);
    int month = c.get(Calendar.MONTH);
    int day = c.get(Calendar.DAY_OF_MONTH);


    // Create a new instance of DatePickerDialog and return it
    return new DatePickerDialog(getActivity(), this, year, month, day);
    }
}

调用此片段的代码是：

textViewToChange.setOnLongClickListener(new OnLongClickListener() {

        @Override
        public boolean onLongClick(View v) {

            DialogFragment newFragment = new DatePickerFragment() {
                public void onDateSet(DatePicker view, int year, int month, int day) {
                                    //TODO some stuff here                          
                                    changed = true;
                }
            };

            newFragment.show(getSupportFragmentManager(), "datePicker");

            return changed;
        }
    });

我已经尝试了所有我能阅读的内容，但我无法弄清楚如何设置标题。显示的标题是今天的日期。我想设置标题并添加图标。任何帮助都会很棒！