title: set selected date to datepicker dialog
body: <p>after user select the date and reopen datepicker dialog, it set to current date...not the selected date...how do I set to selected date to datepicker after user reopen datepicker dialog, here is my code</p>
  
  <pre><code>@Override
      public void onClick(View v) {
          Dialog.Builder builder = null;
          Calendar c = Calendar.getInstance();
          int year = c.get(Calendar.YEAR)+10;
          c.set(year, c.get(Calendar.MONTH), c.get(Calendar.DATE));
          builder = new DatePickerDialog.Builder(R.style.CustomStyle_DatePicker) {
              @Override
              public void onPositiveActionClicked(DialogFragment fragment) {
                  DatePickerDialog dialog = (DatePickerDialog) fragment.getDialog();
                  String date = dialog.getFormattedDate(SimpleDateFormat.getDateInstance());
                  selected_date.setText(date);
                  super.onPositiveActionClicked(fragment);
              }
  
              @Override
              public void onNegativeActionClicked(DialogFragment fragment) {
                  super.onNegativeActionClicked(fragment);
              }
          }.dateRange(System.currentTimeMillis() - 1000, c.getTimeInMillis());
          builder.positiveAction("OK")
                  .negativeAction("CANCEL");
          DialogFragment fragment = DialogFragment.newInstance(builder);;
          fragment.show(getFragmentManager(), null);
      }
  </code></pre>
  
  <p>I've search around but I could not get it work, any help?</p>