Custom DatePicker as Preference does not keep value when user edits value in field

Question

I created a DatePickerPreference, i.e. I extended DialogPreference and created a DatePicker object inside and had it working almost perfectly. It changes values when you click t

Answer 1

Since this class extends the DialogPreference class, it already handles changing the SharedPreference using the buttons. To correctly update your date variable after the user types the new date, you need to update the SharedPreference manually.

You can do this as follows:

SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
SharedPreferences.Editor preferences = prefs.edit();
preferences.putLong("mdate_key", mDate.getTime());
preferences.commit();

Here, mdate_key will correspond to the DatePickerPreference key used in the PreferenceActivity XML file.

I recommend either doing this in onDateChanged() or onDestroy().