Как выделить отфильтрованный текст в RecyclerView при использовании виджета SearchView

Question

Как выделить результат поиска в RecyclerView. Я нашел несколько сообщений о Spannable TextView, но не знаю, где их реализовать в моем случае. Цените вы можете посмотреть и помочь.

MainActivity или Chapter1

public class Chapter1 extends AppCompatActivity implements SearchView.OnQueryTextListener { 
     MyRecAdapter myRecAdapter; 
     RecyclerView recyclerView; 
     List<Post> list;   
     @Override 
     protected void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(layout.chapter1_main); 
      recyclerView = (RecyclerView) findViewById(R.id.myrec); 
      createdata(); 
      myRecAdapter = new MyRecAdapter(list, Chapter1.this); 
      recyclerView.setLayoutManager(new LinearLayoutManager(Chapter1.this)); 
      recyclerView.setAdapter(myRecAdapter); 
     }   
     void createdata() {    
      list = new ArrayList<>();    
      String topic_1_1 = getResources().getString(string.topic_1_1); 
      String text_1_1 = getString(string.text_1_1); 
      String topic_1_2 = getResources().getString(string.topic_1_2); 
      String topic_1_3 = getResources().getString(string.topic_1_3); 
      String text_1_3 = getString(string.text_1_3);   
      list.add(new Post(topic_1_1, text_1_1)); 
      list.add(new Post(topic_1_2, "")); 
      list.add(new Post(topic_1_3, text_1_3));    

     }  

     @Override 
     public boolean onCreateOptionsMenu(Menu menu) { 
      getMenuInflater().inflate(R.menu.menu_search, menu); 
      getMenuInflater().inflate(R.menu.main, menu);   
      MenuItem item = menu.findItem(R.id.menu_search); 
      SearchView searchView = (SearchView) MenuItemCompat.getActionView(item);   
      searchView.setOnQueryTextListener(this);   
      return super.onCreateOptionsMenu(menu); 
     }  


     @Override 
     public boolean onQueryTextChange(String newText) {   

      final List<Post> filteredModelList = filter(list, newText);   
      if (filteredModelList.size() > 0) {   
       myRecAdapter.setFilter(filteredModelList); 
       return true; 
      } else { 
       Toast.makeText(Chapter1.this, "Not Found", Toast.LENGTH_SHORT).show(); 
       return false; 
      } 
     }   
     private List<Post> filter(List<Post> models, String query) { 
      query = query.toLowerCase();   
      final List<Post> filteredModelList = new ArrayList<>(); 
      for (Post model : models) {   
       final String text = model.getPostTitle().toLowerCase(); 
       final String text_sub = model.getPostSubTitle().toLowerCase();   
       if (text.contains(query)) { 
        filteredModelList.add(model); 

       } 
       else { 
        if (text_sub.contains(query)) { 
         filteredModelList.add(model); 
        }   
       }  
      } 
      createdata(); 
      myRecAdapter = new MyRecAdapter(filteredModelList, Chapter1.this); 
      recyclerView.setLayoutManager(new LinearLayoutManager(Chapter1.this)); 
      recyclerView.setAdapter(myRecAdapter); 
      myRecAdapter.notifyDataSetChanged(); 
      return filteredModelList; 
     } 
    } 

адаптер

public class MyRecAdapter extends RecyclerView.Adapter<MyRecAdapter.VH> { 
     public List<Post> parkingList;   
     public Context context; 
     ArrayList<Post> mCountryModel;   
     public MyRecAdapter(List<Post> parkingList, Context context) { 
      this.parkingList = parkingList; 
      this.context = context; 
     }   
     @Override 
     public MyRecAdapter.VH onCreateViewHolder(ViewGroup parent, int viewType) { 
      return new MyRecAdapter.VH(LayoutInflater.from(parent.getContext()).inflate(R.layout.mycardview, parent, false)); 
     }   
     @Override 
     public void onBindViewHolder(MyRecAdapter.VH holder, int position) {  
       holder.t1.setText(Html.fromHtml(parkingList.get(position).getPostTitle()));     holder.t2.setText(Html.fromHtml(parkingList.get(position).getPostSubTitle()));   
     }   
     @Override 
     public int getItemCount() { 
      return parkingList.size(); 
     }   
     public class VH extends RecyclerView.ViewHolder { 
      TextView t1, t2;   
      public VH(View view) { 
       super(view);   
       t1 = (TextView) view.findViewById(R.id.list_title); 
       t2 = (TextView) view.findViewById(R.id.list_desc);   
      }   
     }   
     public void setFilter(List<Post> countryModels) { 
      mCountryModel = new ArrayList<>(); 
      mCountryModel.addAll(countryModels);   
      notifyDataSetChanged();   
     } 

    } 

Answer 1

изменение адаптер к

public class MyRecAdapter extends RecyclerView.Adapter<MyRecAdapter.VH> { 
     public List<Post> parkingList;   
     public Context context; 
     ArrayList<Post> mCountryModel; 
     String searchText; 

     public MyRecAdapter(List<Post> parkingList, Context context) { 
      this.parkingList = parkingList; 
      this.context = context; 
     }   
     @Override 
     public MyRecAdapter.VH onCreateViewHolder(ViewGroup parent, int viewType) { 
      return new MyRecAdapter.VH(LayoutInflater.from(parent.getContext()).inflate(R.layout.mycardview, parent, false)); 
     }   
     @Override 
     public void onBindViewHolder(MyRecAdapter.VH holder, int position) {  
       String title = parkingList.get(position).getPostTitle(); 
       String desc = parkingList.get(position).getPostSubTitle(); 

       holder.t1.setText(Html.fromHtml(title));      
       if(searchText.length()>0){ 
        //color your text here 
        int index = desc.indexOf(searchText); 
        while(index>0){ 
         SpannableStringBuilder sb = new SpannableStringBuilder(desc); 
         ForegroundColorSpan fcs = new ForegroundColorSpan(Color.rgb(158, 158, 158)); //specify color here 
         sb.setSpan(fcs, index, searchText.length(), Spannable.SPAN_INCLUSIVE_INCLUSIVE); 
         index = desc.indexOf(searchText,index+1); 

        } 
        holder.t2.setText(sb); 

       }else{ 
       holder.t2.setText(Html.fromHtml(desc)); 
       } 

     }   
     @Override 
     public int getItemCount() { 
      return parkingList.size(); 
     }   
     public class VH extends RecyclerView.ViewHolder { 
      TextView t1, t2;   
      public VH(View view) { 
       super(view);   
       t1 = (TextView) view.findViewById(R.id.list_title); 
       t2 = (TextView) view.findViewById(R.id.list_desc);   
      }   
     }   
     public void setFilter(List<Post> countryModels,String searchText) { 
      mCountryModel = new ArrayList<>(); 
      mCountryModel.addAll(countryModels);   
      this.searchText = searchText; 
      notifyDataSetChanged();   
     } 

    } 

и установить onQueryTextChange в

@Override 
     public boolean onQueryTextChange(String newText) {   

      final List<Post> filteredModelList = filter(list, newText);   
      if (filteredModelList.size() > 0) {   
       myRecAdapter.setFilter(filteredModelList,newText); 
       return true; 
      } else { 
       Toast.makeText(Chapter1.this, "Not Found", Toast.LENGTH_SHORT).show(); 
       return false; 
      } 
     }  

Answer 2

 while(index>**-1**){ 
        SpannableStringBuilder sb = new SpannableStringBuilder(desc); 
        ForegroundColorSpan fcs = new ForegroundColorSpan(Color.rgb(158, 158, 158)); //specify color here 
        sb.setSpan(fcs, index, **index** + searchText.length(), Spannable.SPAN_INCLUSIVE_INCLUSIVE); 
        index = desc.indexOf(searchText,index+1); 

       } 

Немного дополнение к предыдущему ответу, вы должны проверить индекс> -1 вместо этого, иначе первый текст обыкновение быть выделен. Для setSpan, int end должен быть вашим index + searchText.length().