Date picker

Create Datepicker fragment

DatePickerFragment.java

public class DatePickerFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener {

    @NonNull
    @Override
    public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {
        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);
    }

    @Override
    public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
        Log.d("date",String.valueOf(year + " " + month + " " + dayOfMonth));
    }
}

Call datepicker

MainActivity.java

DialogFragment newFragment = new DatePickerFragment();
newFragment.show(getSupportFragmentManager(),"datePicker");