It seems that anyone using Marshmallow (Android 6.0) cannot use DatePicketDialog in my application. There seems to be some kind of topic that I come across. I am using DialogFragment which contains DatePicketDialog so that user can select birthday. Here are the snapshots of DialogFragment with Android 5.x and d 6.x.

I tried to add a theme to the DatePickerDialog constructor, but did the full screen mode DialogFragment , and I don't want that. Does anyone know how I can make DatePickerDialog look like it was before Marshmallow?
UPDATE 1
Here is the code in which I create the DialogFragment :
DialogFragment ageFragment = new DatePickerDialogFragment(); ageFragment.show(getFragmentManager(), "datePicker");
Here is the onCreateDialog inside DatePickerDialogFragment :
@Override public Dialog onCreateDialog(Bundle savedInstanceState) { // Use the current date as the default date in the picker if no filters are set Calendar cal = Calendar.getInstance(); // Set the date 18 years previous, since only 18 and older are allowed on the app cal.add(Calendar.YEAR, -18); int year, month, day; if (iDialogListener.getYear() == -1 || iDialogListener.getMonth() == -1 || iDialogListener.getDay() == -1) { Calendar defaultCal = Calendar.getInstance(); // 40 is the default age to show defaultCal.add(Calendar.YEAR, -40); year = defaultCal.get(Calendar.YEAR); month = defaultCal.get(Calendar.MONTH); day = defaultCal.get(Calendar.DAY_OF_MONTH); } else { year = iDialogListener.getYear(); month = iDialogListener.getMonth(); day = iDialogListener.getDay(); } DatePickerDialog datepicker = new DatePickerDialog(getActivity(), this, year, month, day); datepicker.getDatePicker().setMaxDate(cal.getTimeInMillis()); Calendar minDate = Calendar.getInstance(); minDate.set(Calendar.YEAR, Calendar.getInstance().get(Calendar.YEAR) - 100); datepicker.getDatePicker().setMinDate(minDate.getTimeInMillis()); // Create a new instance of DatePickerDialog and return it return datepicker; }
In theme.xml, the only line that deals with Dialogs is
<item name="android:alertDialogTheme">@style/CustomDialogTheme</item>
But if I think correctly, it does not concern DialogFragment does?
Update 2
Here is the CustomDialogTheme :
<style name="CustomDialogTheme" parent="@android:style/Theme.Holo.Light.Dialog"> <item name="android:windowBackground">@android:color/transparent</item> <item name="android:windowContentOverlay">@null</item> <item name="android:windowMinWidthMajor">@android:dimen/dialog_min_width_major</item> <item name="android:windowMinWidthMinor">@android:dimen/dialog_min_width_minor</item> </style>