Android - 实现搜索过滤器到RecyclerView [英] Android - Implementing search filter to a RecyclerView

问题描述

我需要实现一个基于EditText的搜索功能，我的RecyclerView列表必须被滤除，而typng

这里的代码是：

DisplayAdapter.java 这是适配器

  public class DisplayAdapter extends RecyclerView.Adapter< DisplayAdapter.MyViewHolder> {
 private List< DataHolder> displayedList; 
 public class MyViewHolder extends RecyclerView.ViewHolder {
 public TextView english_d; 
 public MyViewHolder（View view）{
 super（view）; 
 english_d =（TextView）view.findViewById（R.id.engword）; 
 
 $ b public DisplayAdapter（List< DataHolder> displayedList）{
 this.displayedList = displayedList; 
 
 $ b @Override 
 public MyViewHolder onCreateViewHolder（ViewGroup parent，int position）{
 //创建布局
查看itemView = LayoutInflater.from（ parent.getContext（））。inflate（R.layout.list_item，parent，false）; 
 
返回新的MyViewHolder（itemView）; 
 
 @Override 
 public void onBindViewHolder（MyViewHolder holder，int position）{
 DataHolder content = displayedList.get（position）; 
 holder.english_d.setText（content.getEnglish（））; 
 
 @Override 
 public int getItemCount（）{
 return displayedList.size（）; 
 
 
 
 
 $ p  DataHolder.java   / p> 
 
 
  public class DataHolder {
 private String english; 
 
 $ b public DataHolder（）{
} 
 
 public DataHolder（String english，String norse）{
 this.english = english; 
 
 
 
 public String getEnglish（）{
 return english; 
} 
 
 public void setEnglish（String english）{
 this.english = english; 
 
 
 $ b $ / code $ / pre 
 
 
这里是我的片段使用： 
 
 
  @Override 
 public View onCreateView（LayoutInflater inflater，ViewGroup容器，
 Bundle savedInstanceState） {
 View view = inflater.inflate（R.layout.activity_two_fragment，container，false）; 
 
 rv =（RecyclerView）view.findViewById（R.id.list_view_english）; 
 rv.setHasFixedSize（true）; 
 
 inputSearch =（EditText）view.findViewById（R.id.inputSearch）; 
 
 rv.addItemDecoration（new DividerItemDecoration（getActivity（），LinearLayoutManager.VERTICAL））; 
 final LinearLayoutManager layoutManager = new LinearLayoutManager（getActivity（），LinearLayoutManager.VERTICAL，false）; 
 rv.setLayoutManager（layoutManager）; 
 
 
 DisplayContent（）; 
 
 
 disp_adapter = new DisplayAdapter（displayedList）; 
 
 rv.setAdapter（disp_adapter）; 
返回视图; 
 
  
 
 
解决方案
用于更新列表 
 
 
  public void updateList（List< DataHolder> list）{
 displayedList = list; 
 notifyDataSetChanged（）; 
 
 
 
 $ b $ p 
 $ b 
添加用于搜索的textWatcher可以让您使用Edittext作为搜索字段
  searchField.addTextChangedListener（new TextWatcher（）{
 @Override $ b $ public void onTextChanged（CharSequence s，int start， int before，int count）{
 
 // TODO自动生成方法存根
 
 $ b @Override 
 public void beforeTextChanged（CharSequence s，int int count，int after）{
 
 // TODO自动生成的方法存根
} 
 
 @Override 
 public void afterTextChanged（Editable s ）{
 
 //从输入
过滤你的列表（s.toString（））; 
 //你可以使用可运行的postDelayed，比如500毫秒来延迟搜索文本
} 
}）; 
 
 
 void filter（String text）{
 List< DataHolder> temp = new ArrayList（）; 
 for（DataHolder d：displayedList）{
 //或者使用.equal（text）与你想要的匹配
 //使用.toLowerCase（）获得更好的匹配
 if（ d.getEnglish（）。contains（text））{
 temp.add（d）; 
 
 
 //更新recyclerview 
 disp_adapter.updateList（temp）; 
} 
  
 
I need to implement a search feature based on an EditText to my RecyclerView the list must be filtered while typng

Here's the code :

DisplayAdapter.java this is the adapter
public class DisplayAdapter extends RecyclerView.Adapter<DisplayAdapter.MyViewHolder>{
    private List<DataHolder> displayedList;
    public class MyViewHolder extends RecyclerView.ViewHolder{
        public TextView english_d;
        public MyViewHolder(View view){
              super(view);
              english_d = (TextView) view.findViewById(R.id.engword);
        }
   }
    public DisplayAdapter(List<DataHolder> displayedList){
        this.displayedList = displayedList;
      }

    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int position)    {
    // create a layout
    View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item, parent, false);

    return new  MyViewHolder(itemView);
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
    DataHolder content = displayedList.get(position);
    holder.english_d.setText(content.getEnglish());
   }
@Override
public int getItemCount() {
    return displayedList.size();
   }
}
DataHolder.java
public class DataHolder {
private String english;


public DataHolder() {
}

public DataHolder(String english, String norse) {
    this.english = english;

}

public String getEnglish() {
    return english;
}

public void setEnglish(String english) {
    this.english = english;
   }

}
and here's the Fragment that I am working with :
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.activity_two_fragment, container, false);

        rv = (RecyclerView) view.findViewById(R.id.list_view_english);
        rv.setHasFixedSize(true);

        inputSearch = (EditText) view.findViewById(R.id.inputSearch);

        rv.addItemDecoration(new DividerItemDecoration(getActivity(), LinearLayoutManager.VERTICAL));
        final LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity(), LinearLayoutManager.VERTICAL, false);
        rv.setLayoutManager(layoutManager);


        DisplayContent();


        disp_adapter = new DisplayAdapter(displayedList);

        rv.setAdapter(disp_adapter);
   return view;
}

解决方案
in your adapter add new function for update the list
public void updateList(List<DataHolder> list){
     displayedList = list;
     notifyDataSetChanged();
}
add textWatcher for search lets say you are using Edittext as search field
searchField.addTextChangedListener(new TextWatcher() {
        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {

            // TODO Auto-generated method stub
        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            // TODO Auto-generated method stub
        }

        @Override
        public void afterTextChanged(Editable s) {

            // filter your list from your input
            filter(s.toString());
            //you can use runnable postDelayed like 500 ms to delay search text
        }
    });


void filter(String text){
     List<DataHolder> temp = new ArrayList();
     for(DataHolder d: displayedList){
           //or use .equal(text) with you want equal match
           //use .toLowerCase() for better matches
           if(d.getEnglish().contains(text)){
               temp.add(d);
           }
     }
     //update recyclerview
     disp_adapter.updateList(temp);
}


                        
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