How to hide date in date picker

Question

I use the code below to hide the Date in Date picker. This code is great for Android Marshmallow, Lollipop. But it crashes when I try to use it on an Android Nougat device.

if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.HONEYCOMB) {
    MyDatePickerDialog myDatePickerDialog = new MyDatePickerDialog(this, android.R.style.Theme_Holo_Light_Dialog, onDateSetListener, y, m, d);
    myDatePickerDialog.setPermanentTitle("Date Picker");
    ((ViewGroup) myDatePickerDialog.getDatePicker())
            .findViewById(
                    Resources.getSystem().getIdentifier("day", "id",
                            "android")).setVisibility(View.GONE);
    DatePicker datePicker = myDatePickerDialog.getDatePicker();              
    datePicker.setCalendarViewShown(false);
    datePicker.setDescendantFocusability(DatePicker.FOCUS_BLOCK_DESCENDANTS);
    return myDatePickerDialog;
}

An accident is found in the following code.

 ((ViewGroup) myDatePickerDialog.getDatePicker())
     .findViewById(Resources.getSystem().getIdentifier("day", "id",
          "android")).setVisibility(View.GONE);