从recyclerview转到片段，当我按下back按钮时，recyclerview再次添加相同的数据

// 在活动中切换到片段
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.fragment_container, new YourFragment());
transaction.addToBackStack(null);
transaction.commit();

// 在片段中设置RecyclerView和适配器
public class YourFragment extends Fragment {
    private RecyclerView recyclerView;
    private YourAdapter adapter;
    private List<YourData> dataList;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.your_fragment_layout, container, false);
        
        recyclerView = view.findViewById(R.id.recycler_view);
        recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
        
        dataList = new ArrayList<>();
        adapter = new YourAdapter(dataList);
        recyclerView.setAdapter(adapter);
        
        return view;
    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
        dataList.clear(); // 清空数据集合
    }
}

// 监听返回按钮的点击事件
@Override
public void onBackPressed() {
    if (getSupportFragmentManager().getBackStackEntryCount() > 0) {
        getSupportFragmentManager().popBackStack();
    } else {
        super.onBackPressed();
    }
}