如何在两个类中使用一个DatePickerDialog？

public class CustomDatePickerDialog extends DatePickerDialog implements DatePickerDialog.OnDateSetListener {

    private OnDateSetListener mListener;

    public CustomDatePickerDialog(Context context, OnDateSetListener listener, int year, int month, int dayOfMonth) {
        super(context, listener, year, month, dayOfMonth);
        mListener = listener;
    }

    @Override
    public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
        mListener.onDateSet(view, year, month, dayOfMonth);
    }
}

public class ClassA extends AppCompatActivity implements DatePickerDialog.OnDateSetListener {

    // ...

    private void showDatePickerDialog() {
        Calendar calendar = Calendar.getInstance();
        int year = calendar.get(Calendar.YEAR);
        int month = calendar.get(Calendar.MONTH);
        int dayOfMonth = calendar.get(Calendar.DAY_OF_MONTH);

        CustomDatePickerDialog datePickerDialog = new CustomDatePickerDialog(this, this, year, month, dayOfMonth);
        datePickerDialog.show();
    }

    @Override
    public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
        // 处理日期选择后的逻辑
    }
}

public class ClassB extends AppCompatActivity implements DatePickerDialog.OnDateSetListener {

    // ...

    private void showDatePickerDialog() {
        Calendar calendar = Calendar.getInstance();
        int year = calendar.get(Calendar.YEAR);
        int month = calendar.get(Calendar.MONTH);
        int dayOfMonth = calendar.get(Calendar.DAY_OF_MONTH);

        CustomDatePickerDialog datePickerDialog = new CustomDatePickerDialog(this, this, year, month, dayOfMonth);
        datePickerDialog.show();
    }

    @Override
    public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
        // 处理日期选择后的逻辑
    }
}