如果我的 searchView 搜索视图中没有任何内容，则显示所有用途为空

如何解决如果我的 searchView 搜索视图中没有任何内容，则显示所有用途为空

我使用的是 android studio 4.2.1，我添加了一个 searchView 以通过电子邮件或名称查找用户，如果查询匹配，则更新我的适配器以仅显示搜索到的用户recyclerView 中的配置文件，当adapter.ItemCount == 0 时，我显示一个TextView "Usernotfound"，一切正常但我希望如果用户输入空查询或按退格并清除整个searchView，然后recyclerView 将拥有所有用户，并且“未找到用户”textView 可见性应为“GONE”

这是用于 searchView QueryListener

 searchView.setQueryHint("Enter user's name or email..... ");
    
    searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
        @Override
        public boolean onQueryTextSubmit(String s) {
  
            String query=s.trim();
            if(!TextUtils.isEmpty(query))
            {
                //search user.
                SearchUser(query);

            }else
            {
                //Text search is empty get all users.
                SearchUser("");

            }

            return false;
        }

        @Override
        public boolean onQueryTextChange(String newText) {
       
            if(!TextUtils.isEmpty(newText))
            {
                //search user.
                SearchUser(newText);

            }else
            {
                //Text search is empty get all users.

            }


            return false;
        }
    });

这是为了搜索用户

private void SearchUser(String query) {

//get current user.
FirebaseUser fUser= FirebaseAuth.getInstance().getCurrentUser();


DatabaseReference reference= FirebaseDatabase.getInstance().getReference("Users");

reference.addValueEventListener(new ValueEventListener() {
    @Override
    public void onDataChange(@NonNull @NotNull DataSnapshot snapshot) {
        userList.clear();
        for(DataSnapshot ds:snapshot.getChildren())
        {
            
            ModelUsers modelUser=ds.getValue(ModelUsers.class);

            /* condition to fulfill search.

            1.user should not be current user.
            2.the user name and email should contain text in search view.

             */

            //get all searched users except currently signed in user.
            if(!modelUser.getUid().equals(fUser.getUid()))
            {
                if(modelUser.getName().toLowerCase().contains(query.toLowerCase())
                        || modelUser.getEmail().toLowerCase().contains(query.toLowerCase()))
                {
                    userList.add(modelUser);// object is passed into the userList.
                }

            }

            //passing context and object of model class which will have all the info in adapter.

            //refresh adapter


        }
        adapterUser= new AdapterUser(getActivity(),userList);

        if(adapterUser.getItemCount() == 0)
        {
            if(!TextUtils.isEmpty(query)){
                Toast.makeText(getActivity(),"not empty",Toast.LENGTH_SHORT).show();
                error.setVisibility(View.VISIBLE);
            }else if(TextUtils.isEmpty(query))
            {
                error.setVisibility(View.GONE);
                getAllUsers();
            }

        }else
        {
            error.setVisibility(View.GONE);
        }
        adapterUser.notifyDataSetChanged();

        //set arrayAdapter to recyclerview.
        recyclerView.setAdapter(adapterUser);

    }