Change DatePickerDialog's button texts

setButton ist the correct approach. As listener just pass the dialog object itself, because the onDateSetListener gets passed with the constructor of the dialog.

DatePickerDialog dpd = new DatePickerDialog(this, mDateSetListener, mYear_g, mMonth_g, mDay_g); 
dpd.setButton(DatePickerDialog.BUTTON_POSITIVE, "Button Text", dpd);