Firestore使用whereequalto搜索特定文档不会返回任何内容

Question

我正在尝试在firestore集合中实现搜索功能，该功能应该在firestore回收器视图中获取并显示包含输入字符串的所有文档，但是我的回收器视图始终为空并且不返回任何项目。 请看一下我的代码： //此方法会将数据加载到回收站视图中

private void initializeData()
    {
        db = FirebaseFirestore.getInstance();
      //Query query = null;
        Query  query;
        if (txt!=null){
             query = db.collection("Items").whereEqualTo(txt, true);

        }else{
              query = db.collection("Items");
        s="Items";
        }
        FirestoreRecyclerOptions<FriendsResponse> response = new FirestoreRecyclerOptions.Builder<FriendsResponse>()
                .setQuery(query, FriendsResponse.class)
                .build();
        adapter = new FirestoreRecyclerAdapter<FriendsResponse, FriendsHolder>(response) {
            @Override
            public void onBindViewHolder(FriendsHolder holder, int position, FriendsResponse model) {
                String id = getSnapshots().getSnapshot(position).getId();
                holder.exname.setText(id);
                db.collection("Items").document(id).get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
                    @Override
                    public void onComplete(@NonNull Task<DocumentSnapshot> task) {
                        DocumentSnapshot document = task.getResult();
                        String url= (String) document.getData().get("imageurl");
                        // Toast.makeText(getContext(),url,Toast.LENGTH_LONG).show();
                        Glide.with(getContext()).load(url).into(holder.imgmenu);
                    }
                });  

            }

            @Override
            public FriendsHolder onCreateViewHolder(ViewGroup group, int i) {
                View view = LayoutInflater.from(group.getContext())
                        .inflate(R.layout.menu_item, group, false);

                return new FriendsHolder(view);
            }

            @Override
            public void onError(FirebaseFirestoreException e) {
                Log.e("error", e.getMessage());
            }
        };

        adapter.notifyDataSetChanged();
        //int spaceInPixels = 200;
        DividerItemDecoration verticalDecoration = new DividerItemDecoration(recyclerView.getContext(),
                DividerItemDecoration.HORIZONTAL);
        Drawable verticalDivider = ContextCompat.getDrawable(getActivity(), R.drawable.divider_vertical);
        verticalDecoration.setDrawable(verticalDivider);
        recyclerView.addItemDecoration(verticalDecoration);

        DividerItemDecoration horizontalDecoration = new DividerItemDecoration(recyclerView.getContext(),
                DividerItemDecoration.VERTICAL);
        Drawable horizontalDivider = ContextCompat.getDrawable(getActivity(), R.drawable.divider_horizontal);
        horizontalDecoration.setDrawable(horizontalDivider);
        recyclerView.addItemDecoration(horizontalDecoration);
        recyclerView.setAdapter(adapter);
}

这是我的搜索栏的代码：

public void search(){
        //setContentView(R.layout.view_feed_toolbar);
        searchBar = (MaterialSearchBar) getActivity().findViewById(R.id.searchBar);
        searchBar.setSpeechMode(false);
        searchBar.enableSearch();
        searchBar.setOnSearchActionListener(new MaterialSearchBar.OnSearchActionListener() {
            @Override
            public void onSearchStateChanged(boolean enabled) {
                String s = enabled ? "enabled" : "disabled";
                Toasty.info(getContext(), "Search " + s, Toast.LENGTH_SHORT,true).show();
                if (s.equals("disabled")){
                    searchBar.setVisibility(View.INVISIBLE);
                    txt=null;
                    initializeData();
                }
            }

            @Override
            public void onSearchConfirmed(CharSequence text) {
            txt=text.toString();
            initializeData();
            }

            @Override
            public void onButtonClicked(int buttonCode) {

            }
        });
    }