DatepickerDialog et Cancel

Au final, j'ai trouvé une méthode:
Code:
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private class setDate implements  DatePickerDialog.OnDateSetListener {
 
        private EditText editText;
        private Calendar myCalendar;
        String oldDate;
        int mYear;
        int mMonth;
        int mDay;
 
        public setDate(final EditText editText) {
            this.editText = editText;
            myCalendar = Calendar.getInstance();
            if (editText.getText().length()>0)
            {
                oldDate = editText.getText().toString();
                mYear = Integer.valueOf(oldDate.substring(0, 4));
                mMonth = Integer.valueOf(oldDate.substring(4, 6))-1;
                mDay = Integer.valueOf(oldDate.substring(6, 8));
            }
            else
            {
                mYear = myCalendar.get(Calendar.YEAR);
                mMonth = myCalendar.get(Calendar.MONTH);
                mDay = myCalendar.get(Calendar.DAY_OF_MONTH);
            }
 
           final DatePickerDialog dpd = new DatePickerDialog(getContext(), this, mYear,mMonth,                    myCalendar.get(Calendar.DAY_OF_MONTH));
            dpd.setCanceledOnTouchOutside(true);
            dpd.setButton(DialogInterface.BUTTON_POSITIVE, getContext().getString(R.string.ok),
                    new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            DatePicker dp = dpd.getDatePicker();
 
                            String myFormat = "yyyyMMdd";
                            SimpleDateFormat sdformat = new SimpleDateFormat(myFormat, Locale.FRANCE);
                            myCalendar.set(Calendar.YEAR, dp.getYear());
                            myCalendar.set(Calendar.MONTH, dp.getMonth());
                            myCalendar.set(Calendar.DAY_OF_MONTH, dp.getDayOfMonth());
 
                            editText.setText(sdformat.format(myCalendar.getTime()));
 
                        }
                    });
            dpd.setButton(DialogInterface.BUTTON_NEGATIVE, getContext().getString(R.string.cancel),
                    new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
 
                        }
                    });
            dpd.show();
        }
 
        @Override
        public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {}
    }