How do I show the previously selected date in a DatePickerDialog on next call?

Question

A DatePickerDialog is loaded in a Fragment with today's showing as the default date when the dialog is first opened. The user then selects a date and then the dialog is dismissed. On next re-open, how do I show the previously selected date as the default date rather than it showing today's date?

I have tried .set() in the Activity but don't know how to use .get() to retrieve the date in the fragment. I've tried an interface with a listener between the Activity and the fragement but could not get that to work and it seems overly complicated for the simple task I am trying to achieve. And I've tried a bundle sent from the Activity to the fragment but I haven't been able to get that to work either. Please advise.

Activity file:

...
final Calendar c = Calendar.getInstance();
c.set(Calendar.YEAR, year);
c.set(Calendar.MONTH, month);
c.set(Calendar.DAY_OF_MONTH, day);
DialogFragment newFragment = new DatePickerFragment();
newFragment.show(getSupportFragmentManager(), "datePicker");

Fragment file:

...
public static class DatePickerFragment extends DialogFragment
                        implements DatePickerDialog.OnDateSetListener {

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    // Use the current date as the default date in the picker
    final Calendar c = Calendar.getInstance();
    int year = c.get(Calendar.YEAR);
    int month = c.get(Calendar.MONTH);
    int day = c.get(Calendar.DAY_OF_MONTH);

    return new DatePickerDialog(getActivity(), this, year, month, day);
}

public void onDateSet(DatePicker view, int year, int month, int day) {
    // Save selected date in a date variable here?  How?
    // How do I then use the date variable in onCreateDialog
    // rather than the get(Calendar) code that returns today's date? 
}

}

Answer 1

Get a DatePicker with default today date:

@SuppressLint("SimpleDateFormat")
private SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
private Calendar calendar = null;

int year = calendar.get(Calendar.YEAR);
int month = calendar.get(Calendar.MONTH);
int day = calendar.get(Calendar.DAY_OF_MONTH);
OnDateSetListener dateSetListener = new OnDateSetListener() {

@Override
public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
calendar.set(year, monthOfYear, dayOfMonth);
//this line save-s the DatePicker selected date to the edittext
//you can try with:  Date dpDate =new Date(sdf.format(calendar.getTime();
birthDate.setText(sdf.format(calendar.getTime()));
}
};

final DatePickerFragment datePickerFragment = new DatePickerFragment(StepSettingsView.this, dateSetListener, year, month, day);
datePickerFragment.getDatePicker().setMaxDate(new Date().getTime());
datePickerFragment.show();
                    datePickerFragment.getButton(DatePickerDialog.BUTTON_NEUTRAL).setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
birthDate.setText("");
datePickerFragment.dismiss();
}
});

Answer 2

In Bundle you should send the year month and day value and retreive here like:

@Override
public Dialog onCreateDialog(Bundle mBundle) {

    int year = mBundle.getInt("YEAR");
    int month =  mBundle.getInt("MONTH");
    int day =  mBundle.getInt("DAY");

    return new DatePickerDialog(getActivity(), this, year, month, day);
}

public void onDateSet(DatePicker view, int year, int month, int day) {
    // Save selected date in a date variable here?  How?
    // How do I then use the date variable in onCreateDialog
    // rather than the get(Calendar) code that returns today's date? 
}

From where we are calling this date time picker fragment from there you need to send this bundle.