RecyclerView列表搜索（过滤）EditText问题
Posted
技术标签:
【中文标题】RecyclerView列表搜索（过滤）EditText问题【英文标题】：RecyclerView list search (filter) EditText problem 【发布时间】：2021-12-03 18:27:07 【问题描述】：我想在我的recyclerview列表中添加一个搜索功能，我通过查看教科书尝试了互联网上的代码，它工作正常但是如果你删除edittext中的字母列表不会返回，它只是删除列表。
示例：如果我在edittext中输入'' I 12345 ''，其余的将被删除，只保留'' I 12345 ''，但如果我在edittext中删除文本，列表将不会返回。
请帮忙修复！
这里是我的所有代码：
MainActivity java：
public class MainActivity extends AppCompatActivity
RecyclerViewAdapter recyclerViewAdapter;
RecyclerView recyclerView;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerView = findViewById(R.id.recyclerview1);
//here start search code
EditText editText = findViewById(R.id.izlash_edittext);
editText.addTextChangedListener(new TextWatcher()
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after)
@Override
public void onTextChanged(CharSequence s, int start, int before, int count)
@Override
public void afterTextChanged(Editable s)
filter(s.toString());
);
//here end search code
recyclerView.setLayoutManager(new LinearLayoutManager(getApplicationContext()));
ArrayList<Item> items = new ArrayList<>();
items.add(new Item("start", R.drawable.start));
items.add(new Item("end", R.drawable.end));
recyclerView.setAdapter(recyclerViewAdapter);
//here start search code
private void filter(String title)
ArrayList<Item> filteredList = new ArrayList<>();
for (Item item : recyclerViewAdapter.items)
if (item.title.toLowerCase().contains(title.toLowerCase()))
filteredList.add(item);
recyclerViewAdapter.filterList(filteredList);
//here end search code
RecyclerViewAdapter java:
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder>
ArrayList<Item> items;
ItemClickListener itemClickListener;
public RecyclerViewAdapter(ArrayList<Item> items, ItemClickListener itemClickListener)
this.items = items;
this.itemClickListener = itemClickListener;
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType)
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.single_item, parent, false);
return new ViewHolder(view);
@Override
public void onBindViewHolder(@NonNull RecyclerViewAdapter.ViewHolder holder, int position)
Item item = items.get(position);
holder.title.setText(item.title);
holder.imageView.setImageResource(item.image);
holder.itemView.setOnClickListener(view ->
itemClickListener.onClick(item);
);
@Override
public int getItemCount()
return items.size();
//here start search code
public void filterList(ArrayList<Item> filteredList)
items = filteredList;
notifyDataSetChanged();
//here end search code
public interface ItemClickListener
void onClick(Item item);
class ViewHolder extends RecyclerView.ViewHolder
TextView title;
ImageView imageView;
public ViewHolder(@NonNull View itemView)
super(itemView);
title = itemView.findViewById(R.id.textView1);
imageView = itemView.findViewById(R.id.imageview1);
项目 java：
public class Item
String title;
int image;
String qisqaMalumot;
String uzunMalumot;
public Item(String title, int image, String qisqaMalumot, String uzunMalumot)
this.title = title;
this.image = image;
this.qisqaMalumot = qisqaMalumot;
this.uzunMalumot = uzunMalumot;
请帮帮我。
【问题讨论】：
将 recyclerViewAdapter.items 替换为您的原始项目列表，因为您正在循环遍历已过滤的列表 对不起，请给我看看代码吗？我应该在哪里改变，谢谢。 在 oncreate 之外声明您的项目列表（移动 ArrayList for (Item item : recyclerViewAdapter.items)
if (item.title.toLowerCase().contains(title.toLowerCase()))
filteredList.add(item);
当您在recyclerViewAdapter.items 中搜索时，recyclerview 被新数据替换，旧数据消失了。
首先制作全局列表ArrayList<Item> items = new ArrayList<>();
public class MainActivity extends AppCompatActivity
RecyclerViewAdapter recyclerViewAdapter;
ArrayList<Item> items = new ArrayList<>();
RecyclerView recyclerView;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
在你的 for 循环中第二次替换 items：
for (Item item : items)
if (item.title.toLowerCase().contains(title.toLowerCase()))
filteredList.add(item);
完成了！
【讨论】：
【参考方案2】：首先您需要在您的适配器中实现 Filterable。然后您需要在 listadapter 中保留一个过滤的项目，以便您可以恢复到它的旧状态。当您在主活动中登录以从 edittext 查询时，适配器可以通过这种方式更改并恢复到其旧状态。如果你根据自己编辑代码，它会顺利运行。
public class BulletinAdapter extends RecyclerView.Adapter<BulletinAdapter.BulletinVHolder> implements Filterable
private Context context;
private List<EventResponseItem> eventsItemList;
private List<EventResponseItem> filteredList;
public BulletinAdapter(Context context, List<EventResponseItem> eaItemList)
this.context = context;
this.filteredList = eaItemList;
@NonNull
@Override
public BulletinVHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType)
return new BulletinVHolder(RowNewaddBinding.inflate(LayoutInflater.from(context), parent, false));
@Override
public void onBindViewHolder(@NonNull BulletinVHolder holder, int position)
EventResponseItem eaItem = filteredList.get(position);
if (eaItem != null)
holder.bind.rowNewMatchId.setText(String.valueOf(eaItem.getEid()));
@Override
public int getItemCount()
if (filteredList != null && filteredList.size() > 0)
return filteredList.size();
else
return 0;
@Override
public int getItemViewType(int position)
return super.getItemViewType(position);
@Override
public Filter getFilter()
return new Filter()
@Override
protected FilterResults performFiltering(CharSequence constraint)
String charString = constraint.toString();
if (constraint.length() == 0)
filteredList = eventsItemList;
else
List<EventResponseItem> filterList = new ArrayList<>();
for (EventResponseItem modelMovie : eventsItemList)
if (modelMovie.getEprt().get(0).getPn().toLowerCase().contains(charString) | modelMovie.getEprt().get(1).getPn().toLowerCase().contains(charString))
filterList.add(modelMovie);
filteredList = filterList;
FilterResults filterResults = new FilterResults();
filterResults.values = filteredList;
return filterResults;
@Override
protected void publishResults(CharSequence constraint, FilterResults results)
filteredList = (List<EventResponseItem>) results.values;
notifyDataSetChanged();
;
class BulletinVHolder extends RecyclerView.ViewHolder
private RowNewaddBinding bind;
public BulletinVHolder(@NonNull RowNewaddBinding bind)
super(bind.getRoot());
this.bind = bind;
MainActivity.class..
private List<EventResponseItem> eventsItemList; //set list data
private BulletinAdapter bulletinAdapter; //recyclerview set adapter...(data and layoutmanager)
bulletinAdapter = new BulletinAdapter(MatchAddNew.this,eventsItemList);
bind.matchAddNewRecyclerView.setLayoutManager(new LinearLayoutManager(MatchAddNew.this));
bind.matchAddNewRecyclerView.setAdapter(bulletinAdapter);
search(bind.searchViewNewMatch); //viewBinding your edittext...
private void search(SearchView searchView)
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener()
@Override
public boolean onQueryTextSubmit(String s)
return false;
@Override
public boolean onQueryTextChange(String s)
if (bulletinAdapter != null)
bulletinAdapter.getFilter().filter(s.toLowerCase());
return true;
);
【讨论】：
以上是关于RecyclerView列表搜索（过滤）EditText问题的主要内容，如果未能解决你的问题，请参考以下文章
按下键盘上的复选标记键时，可使用 RecyclerView 进行过滤
如何在 Recyclerview 中正确使用 DiffUtil 更新数组列表？
搜索过滤器后如何更新android RecyclerView项目？