Updating time along with date

1

After making change in the date ,the time will be set to 00:00:00

here is my code
public class DatePickerFragment extends DialogFragment {

private static final String ARGS_DATE="date";
public static final String EXTRA_DATE="com.example.x.criminalintent.date";
private DatePicker mDatePicker;


public static DatePickerFragment newInstance(Date date)
{
    Bundle bundle=new Bundle();
    bundle.putSerializable(ARGS_DATE,date);

    DatePickerFragment datePickerFragment=new DatePickerFragment();
    datePickerFragment.setArguments(bundle);
    return datePickerFragment;
}

@Override
public Dialog onCreateDialog(Bundle savedInstanceState)
{
    final Date date= (Date) getArguments().getSerializable(ARGS_DATE);

    Calendar calendar=Calendar.getInstance();
    calendar.setTime(date);

    int day=calendar.get(Calendar.DAY_OF_MONTH);
    int month=calendar.get(Calendar.MONTH);
    int year=calendar.get(Calendar.YEAR);

    View view= LayoutInflater.from(getActivity()).inflate(R.layout.dialog_date,null);
    mDatePicker= (DatePicker) view.findViewById(R.id.dialog_date_picker);
    mDatePicker.init(year,month,day,null);
    return  new AlertDialog.Builder(getActivity())
            .setView(view)
            .setTitle(R.string.date_picker_title)
            .setPositiveButton(android.R.string.ok,
                    new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            int year=mDatePicker.getYear();
                            int month=mDatePicker.getMonth();
                            int day=mDatePicker.getDayOfMonth();
                            Date date1=new GregorianCalendar(year,month,day).getTime();
                            sendResult(Activity.RESULT_OK,date1);
                        }
                    }).create();
}
private void sendResult(int resultCode,Date date)
{
    if(getTargetFragment() == null)
    {
        return;
    }
    Intent intent=new Intent();
    intent.putExtra(EXTRA_DATE,date);
    getTargetFragment().onActivityResult(getTargetRequestCode(),resultCode,intent);

}

}