为什么当我在安卓搜索栏快速删除文本时,我的RecyclerView不会重置?

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英文:

why does my recyclerview not reset when i delete text fast in my searchbar android?

问题

我在我的应用中有一个搜索功能,尽管由于 Firebase Firestore 数据库查询的限制,它的功能非常有限,但我设法使它能够根据用户输入的开头找到匹配的字符串。

现在一切都运行正常,甚至当我输入一个字符串,例如 "starbucks",然后逐个字符地删除它时,我的 RecyclerView 会重置为显示所有可用的商店,而不仅仅是星巴克。

但是当我快速删除(快速按下键盘上的返回按钮)时,它会停留在特定的商店,并且不会刷新。

是什么原因导致了这个问题?

以下是我的搜索适配器:

public class SearchAdapter extends RecyclerView.Adapter<SearchAdapter.SearchAdapterViewHolder> {

    public Context c;
    public ArrayList<Shop> arrayList;

    public SearchAdapter(Context c, ArrayList<Shop> arrayList) {
        this.c = c;
        this.arrayList = arrayList;
    }

    // ... (省略其他方法的内容)

    public class SearchAdapterViewHolder extends RecyclerView.ViewHolder {
        // ... (省略视图绑定的内容)

        public SearchAdapterViewHolder(@NonNull View itemView) {
            super(itemView);
            // ... (省略视图绑定的内容)
        }

        // ... (省略图片加载的方法)
    }
}

这是我的 addTextChangeListener:

searchShops.addTextChangedListener(new TextWatcher() {
    @Override
    public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

    }

    @Override
    public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {


    }

    @Override
    public void afterTextChanged(Editable s) {

        if (!s.toString().isEmpty()) {
            searchInDB(s.toString().toLowerCase());
        } else {
            searchInDB("");
        }
    }
});

这是我的 searchInDB 函数:

private void searchInDB(final String s) {
    firebaseFirestore.collection("Shops")
        .orderBy("searchName")
        .startAt(s)
        .endAt(s + "\uf8ff")
        .get()
        .addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
            @Override
            public void onComplete(@NonNull Task<QuerySnapshot> task) {
                if (task.isSuccessful()) {
                    QuerySnapshot querySnapshot = task.getResult();
                    if (!querySnapshot.isEmpty()) {
                        arrayList.clear();
                        for (QueryDocumentSnapshot DocumentSnapshot : querySnapshot) {
                            final Shop shop = DocumentSnapshot.toObject(Shop.class);
                            arrayList.add(shop);
                        }
                        SearchAdapter searchAdapter = new SearchAdapter(getApplicationContext(), arrayList);
                        recyclerView.setAdapter(searchAdapter);
                        searchAdapter.notifyDataSetChanged();
                    } else {
                        arrayList.clear();
                    }
                } else {

                }
            }
        });
}
英文:

i have a search functionality in my app and although is it very limited due to the firebase firestore database queries, i managed to make it work to find string that match the beginning of the user's input.

now everything works fine, even when i write a string for instance "starbucks" and i slowly delete it character by character it resets my recyclerView to full shops available and not only starbucks.

but when i delete quickly (press down on the back button in the keyboard), it stops at that specific shop and doesnt refresh.

what is causing this?

here is my search adapter:

 public class SearchAdapter extends RecyclerView.Adapter&lt;SearchAdapter.SearchAdapterViewHolder&gt; {

public Context c;
public ArrayList&lt;Shop&gt; arrayList;
public SearchAdapter(Context c,ArrayList&lt;Shop&gt; arrayList){
    this.c = c;
    this.arrayList = arrayList;
}

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

@Override
public long getItemId(int position){
    return position;
}

@NonNull
@Override
public SearchAdapterViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.shop_item,parent,false);
    return new SearchAdapterViewHolder(v);
}

@Override
public void onBindViewHolder(@NonNull SearchAdapterViewHolder holder, int position) {

    final Shop shop = arrayList.get(position);

    holder.list_name.setText(shop.getName());
    String removeBraces = shop.getLocation();
    String removeLeftBrace = removeBraces.replace(&quot;[&quot;,&quot;&quot;);
    String removeRightBrace = removeLeftBrace.replace(&quot;]&quot;,&quot;&quot;);
    holder.list_location.setText(removeRightBrace);
    holder.list_overallRating.setText(&quot;&quot;+shop.getRatings());
    holder.setHeaderImage(shop.getShopHeaderImg());
    holder.list_profileImage(shop.getShopProfileImg());



    holder.cardLayout.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Context context = v.getContext();
            Intent intent = new Intent(context, DetailsActivity.class);
            intent.putExtra(&quot;shopModel&quot;, shop);
            context.startActivity(intent);
        }
    });

}



public class SearchAdapterViewHolder extends RecyclerView.ViewHolder {
    private RelativeLayout cardLayout;
    private TextView list_name;
    private TextView list_location;
    private TextView list_overallRating;
    private ImageView header_img;
    private ImageView list_profileImage;

    public SearchAdapterViewHolder(@NonNull View itemView) {
        super(itemView);

        list_name = itemView.findViewById(R.id.list_name);
        list_location = itemView.findViewById(R.id.list_location);
        list_overallRating = itemView.findViewById(R.id.list_overallRating);
        header_img = itemView.findViewById(R.id.header_img);
        list_profileImage = itemView.findViewById(R.id.list_profileImage);
        cardLayout = itemView.findViewById(R.id.cardLayout);
    }
    public void setHeaderImage(final String Image) {
        final ImageView headerImg = (ImageView)itemView.findViewById(R.id.header_img);
        Picasso.get().load(Image).into(headerImg);

    }
    public void list_profileImage( final String image) {
        final ImageView profileImg = (ImageView)itemView.findViewById(R.id.list_profileImage);
        Picasso.get().load(image).into(profileImg);

    }
}

}

here is my addTextChangeListener:

searchShops.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {


        }

        @Override
        public void afterTextChanged(Editable s) {

            if(!s.toString().isEmpty()){
                searchInDB(s.toString().toLowerCase());
            }else{
               searchInDB(&quot;&quot;);
            }
        }
    });

and here is my searchInDB function:

private void searchInDB(final String s) {

 

firebaseFirestore.collection(&quot;Shops&quot;).orderBy(&quot;searchName&quot;).startAt(s).endAt(s+&quot;\uf8ff&quot;).get().addOnCompleteListener(new OnCompleteListener&lt;QuerySnapshot&gt;() {

         @Override
         public void onComplete(@NonNull Task&lt;QuerySnapshot&gt; task) {
             if(task.isSuccessful()){
                 QuerySnapshot querySnapshot = task.getResult();
                 if(!querySnapshot.isEmpty()){
                     arrayList.clear();
                     for(QueryDocumentSnapshot DocumentSnapshot : querySnapshot) {
                         final Shop shop = DocumentSnapshot.toObject(Shop.class);
                         arrayList.add(shop);

                     }
                     SearchAdapter searchAdapter = new SearchAdapter(getApplicationContext(),arrayList);
                     recyclerView.setAdapter(searchAdapter);
                     searchAdapter.notifyDataSetChanged();

             }else{
                     arrayList.clear();


                }
             }else{

             }
         }


     });

答案1

得分: 1

Change:&lt;br&gt;

如果(!s.toString().isEmpty()){
在数据库中搜索(s.toString().toLowerCase());
}否则{
在数据库中搜索("");
}

如果(!s.toString().isEmpty()){
在数据库中搜索(s.toString().toLowerCase());
}否则{
recyclerView.setAdapter(null);
}


<details>
<summary>英文:</summary>

Change:&lt;br&gt;

if(!s.toString().isEmpty()){
searchInDB(s.toString().toLowerCase());
}else{
searchInDB("");
}

To

if(!s.toString().isEmpty()){
searchInDB(s.toString().toLowerCase());
}else{
recyclerView.setAdapter(null);
}


</details>



huangapple
  • 本文由 发表于 2020年9月3日 18:54:24
  • 转载请务必保留本文链接:https://go.coder-hub.com/63722152.html
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