我想在片段中实现 recyclerview 的搜索栏。我在我的片段中尝试了以下代码，但它不起作用

Question

我已经在我的片段 class 中尝试了以下代码，但它没有工作，也没有显示任何错误，我已经提供了适配器 class 代码和片段 class代码请告诉我在哪里弄错了当我运行代码时它甚至没有显示片段上的搜索栏

//片段class代码

public class PharmacyPatientFragment extends Fragment {
    PharmacyAdapter Adapter;
    private FragmentPharmacyPatientBinding binding;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        binding = FragmentPharmacyPatientBinding.inflate(inflater);
        binding.recylerviewPharmacy.setLayoutManager(new LinearLayoutManager(getContext()));
        Adapter = new PharmacyAdapter(dataqueue());
        binding.recylerviewPharmacy.setAdapter(Adapter);
        return binding.getRoot();
    }

    @Override
    public void onCreateOptionsMenu(@NonNull Menu menu, @NonNull MenuInflater inflater) {

        menu.clear();
        inflater.inflate(R.menu.search_option, menu);
        MenuItem searchItem = menu.findItem(R.id.action_search);
        SearchView searchView = (SearchView) searchItem.getActionView();
        searchItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW | MenuItem.SHOW_AS_ACTION_IF_ROOM);
        super.onCreateOptionsMenu(menu, inflater);
        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String s) {
                return false;
            }

            @Override
            public boolean onQueryTextChange(String s) {
                Adapter.getFilter().filter(s);
                return false;
            }
        });
        searchView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

            }
        });

    }

    public ArrayList<PharmacyDataModel> dataqueue() {
        ArrayList<PharmacyDataModel> holder = new ArrayList<>();
        PharmacyDataModel obj1 = new PharmacyDataModel();
        obj1.setMed_name("Remdesiver");
        obj1.setMfg_change("HealthBio Pharmaceuticals");
        obj1.setPrice_change("10000Rs.");
        obj1.setQty_change("1 unit");
        obj1.setImg_name(R.drawable.remdesiver);
        holder.add(obj1);
        PharmacyDataModel obj2 = new PharmacyDataModel();
        obj2.setMed_name("PPE Kits");
        obj2.setMfg_change("HealthBio Pharmaceuticals");
        obj2.setPrice_change("800Rs.");
        obj2.setQty_change("1 unit");
        obj2.setImg_name(R.drawable.ppe);
        holder.add(obj2);
        PharmacyDataModel obj3 = new PharmacyDataModel();
        obj3.setMed_name("Masks");
        obj3.setMfg_change("HealthBio Pharmaceuticals");
        obj3.setPrice_change("100Rs.");
        obj3.setQty_change("1 unit");
        obj3.setImg_name(R.drawable.masks);
        holder.add(obj3);
        PharmacyDataModel obj4 = new PharmacyDataModel();
        obj4.setMed_name("Gloves");
        obj4.setMfg_change("HealthBio Pharmaceuticals");
        obj4.setPrice_change("50Rs.");
        obj4.setQty_change("1 unit");
        obj4.setImg_name(R.drawable.gloves);
        holder.add(obj4);
        PharmacyDataModel obj5 = new PharmacyDataModel();
        obj5.setMed_name("Gluconate tablets");
        obj5.setMfg_change("HealthBio Pharmaceuticals");
        obj5.setPrice_change("100Rs.");
        obj5.setQty_change("20 tablets");
        obj5.setImg_name(R.drawable.gluconate);
        holder.add(obj5);
        PharmacyDataModel obj6 = new PharmacyDataModel();
        obj6.setMed_name("Sugar Free");
        obj6.setMfg_change("HealthBio Pharmaceuticals");
        obj6.setPrice_change("250Rs.");
        obj6.setQty_change("1 unit");
        obj6.setImg_name(R.drawable.sugarfree);
        holder.add(obj6);
        PharmacyDataModel obj7 = new PharmacyDataModel();
        obj7.setMed_name("Zincovit");
        obj7.setMfg_change("HealthBio Pharmaceuticals");
        obj7.setPrice_change("150Rs.");
        obj7.setQty_change("1 unit");
        obj7.setImg_name(R.drawable.zincovit);
        holder.add(obj7);

        return holder;
    }


}

//适配器class代码

public class PharmacyAdapter extends RecyclerView.Adapter<PharmacyViewHolder> implements Filterable {
    ArrayList<PharmacyDataModel> data;
    ArrayList<PharmacyDataModel> datacopy;
    private final Filter dataFilter = new Filter() {
        @Override
        protected FilterResults performFiltering(CharSequence charSequence) {
            ArrayList<PharmacyDataModel> filteredList = new ArrayList<>();
            if (charSequence == null || charSequence.length() == 0) {
                filteredList.addAll(datacopy);
            } else {
                String filterPattern = charSequence.toString().toLowerCase().trim();
                for (PharmacyDataModel item : datacopy) {
                    if (item.getMed_name().toLowerCase().contains(filterPattern)) {
                        filteredList.add(item);
                    }
                }
            }
            FilterResults results = new FilterResults();
            results.values = filteredList;
            return results;
        }

        @Override
        protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
            data.clear();
            data.addAll((ArrayList) filterResults.values);
            notifyDataSetChanged();
        }
    };

    public PharmacyAdapter(ArrayList<PharmacyDataModel> data) {
        this.data = data;
        datacopy = new ArrayList<>(data);
    }

    @NonNull
    @Override
    public PharmacyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

        LayoutInflater inflater = LayoutInflater.from(parent.getContext());
        View view = inflater.inflate(R.layout.singlepharmacy_row, parent, false);
        return new PharmacyViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull PharmacyViewHolder holder, int position) {
        holder.textMedName.setText(data.get(position).getMed_name());
        holder.textMedQty.setText(data.get(position).getQty_change());
        holder.textMedPrice.setText(data.get(position).getPrice_change());
        holder.textMedMfg.setText(data.get(position).getMfg_change());
        holder.imageMed.setImageResource(data.get(position).getImg_name());

    }

    @Override
    public int getItemCount() {
        return data.size();
    }

    @Override
    public Filter getFilter() {
        return dataFilter;
    }

}

Answer 1

您需要使用 str 将循环计数器转换为字符串，将值包含在列表中，使用乘法运算符重复列表中的值，然后使用字符串 join插入空格的函数。这是一个例子。如果你想从 1 1 1 而不是像我在这里做的那样只是 1 开始，那么 print(' '.join((i + 2) * [str(i)])) 而不是显示的

>>> for i in range(1, 6):
...     print(' '.join(i*[str(i)]))
...
1
2 2
3 3 3
4 4 4 4
5 5 5 5 5

我想在片段中实现 recyclerview 的搜索栏。我在我的片段中尝试了以下代码，但它不起作用

I want to implement a searchbar for recycler view in a fragment. I have tried the below code in my fragment but it is not working

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android-recyclerview