Calendar calendar = Calendar.getInstance();
int year = calendar.get(Calendar.YEAR);
int monthOfYear = calendar.get(Calendar.MONTH);
int dayOfMonth = calendar.get(Calendar.DAY_OF_MONTH);
DatePickerDialog datePickerDialog = new DatePickerDialog(activity.this, new DatePickerDialog.OnDateSetListener() {
    @Override
 
public void onDateSet(DatePicker datePicker, int yyyy, int mm, int dd) {
        birthday = yyyy + "-" + (mm + 1) + "-" + dd;
    }
}, year, monthOfYear, dayOfMonth);
DatePicker datePicker = datePickerDialog.getDatePicker();
Date taday = Calendar.getInstance().getTime();//當天
try {
    datePicker.setMinDate(taday.getTime());// 最小日期
 
datePicker.setMaxDate(taday.getTime());// 最大日期
} catch (Exception e) {

}
datePickerDialog.show();