搜索通過RecyclerView使用搜索查看

Question

我想通過RecyclerView搜索，我有List<BaseOfCards>（BaseOfCards是我的getter &二傳手類） 我RecyclerViewAdapter：

public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.MyViewHolder> { 


private LayoutInflater inflater; 
private List<BaseOfCards> items; 

//private int itemLayout; 
//String cardvalue; 
private Activity mActivity; 

public RecyclerViewAdapter(Activity mActivity, Context context, List<BaseOfCards> items) { 
    this.mActivity = mActivity; 
    inflater = LayoutInflater.from(context); 
    this.items = items; 
    //this.itemLayout = itemLayout; 
} 

@Override 
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 

    View view = inflater.inflate(R.layout.custom_row, parent, false); 
    MyViewHolder holder = new MyViewHolder(view, mActivity); 
    return holder; 
} 

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

    BaseOfCards item = items.get(position); 
    holder.title.setTag(item); 
    holder.title.setText(item.getCardName()); 
} 

@Override 
public int getItemCount() { 

    return items.size(); 
} 

public static class MyViewHolder extends RecyclerView.ViewHolder { 
    private Activity mActivity; 
    TextView title; 
    ImageView titileImageView; 

    public MyViewHolder(View itemView, Activity mActivity) { 

     super(itemView); 

     titileImageView = (ImageView) itemView.findViewById(R.id.image_country); 


     title = (TextView) itemView.findViewById(R.id.listText); 
     this.mActivity = mActivity; 

    } 
} 

} 

我添加搜索查看我的菜單，並在初始化MainActivity：

MenuItem menuItem = menu.findItem(R.id.action_search1); 
    searchView = (SearchView) MenuItemCompat.getActionView(menuItem); 
    SearchManager manager = (SearchManager) getSystemService(Context.SEARCH_SERVICE); 
    searchView.setIconifiedByDefault(true); 

我需要什麼，下一步該怎麼做？讓我的RecyclerViewAdapterimplement Filterable還是什麼？或者只是在* RecyclerViewAdapter **中創建類filter，並從我的MainActivity中調用它？

Answer 1

我解決我的問題

1. 讓我的課RecyclerViewAdapterimplements Filterable

2. 添加行private List<BaseOfCards> orig;

3. Add方法getFilter在RecyclerViewAdapter

   public Filter getFilter() { 
   return new Filter() { 
       @Override 
       protected FilterResults performFiltering(CharSequence constraint) { 
        final FilterResults oReturn = new FilterResults(); 
        final List<BaseOfCards> results = new ArrayList<BaseOfCards>(); 
        if (orig == null) 
         orig = items; 
         if (constraint != null){ 
          if(orig !=null & orig.size()>0){ 
           for (final BaseOfCards g :orig) { 
            if (g.getCardName().toLowerCase().contains(constraint.toString()))results.add(g); 
           } 
          } 
          oReturn.values = results; 
         } 
         return oReturn; 
        } 
   
   @Override 
       protected void publishResults(CharSequence constraint, FilterResults results) { 
        items = (ArrayList<BaseOfCards>)results.values; 
        notifyDataSetChanged(); 
   
       } 
   }; 
   

4. 請MainActivityimplements SearchView.OnQueryTextListener和改變方法onQueryTextChange：

   @Override 
   public boolean onQueryTextChange(String newText) { 
       if (TextUtils.isEmpty (newText)) { 
        adapter.getFilter().filter(""); 
       } else { 
        adapter.getFilter().filter(newText.toString()); 
       } 
       return true; 
   } 
   

Answer 2

使用一個autocompletetextview或一個EditText我處理這一個如下其中

public List<SalesProductsItems> mItems   

是初始列表項實例和。

public static List<SalesProductsItems> filteredIt 

在顯示items.Since所述第一時間的過濾器的結果是不是空的mItems實例將等於filteredIt實例使用的實例（而喪失的初始列表）然後在publishResults方法mItems前右失去原始值，我將它與傳遞的實例originallist等同起來。希望它可以幫助別人

private static class ProductsFilter extends Filter { 

    private final SalesProductsAdapter adapter; 

    private final List<SalesProductsItems> originalList; 

    private final List<SalesProductsItems> filteredList; 

    private ProductsFilter(SalesProductsAdapter adapter, List<SalesProductsItems> originalList) { 
     super(); 
     this.adapter = adapter; 
     this.originalList = new LinkedList<>(originalList); 
     this.filteredList = new ArrayList<>(); 
    } 

    @Override 
    protected FilterResults performFiltering(CharSequence constraint) { 
     filteredList.clear(); 
     final FilterResults results = new FilterResults(); 

     if (constraint == null || constraint.length() == 0) 
      filteredList.addAll(originalList); 
     else { 
      final String filterPattern = constraint.toString().toLowerCase().trim(); 

      for (final SalesProductsItems it : originalList) { 

       if (it.getProduct().toLowerCase().contains(filterPattern)) { 
        filteredList.add(it); 
       } 
      } 
     } 

     results.values = filteredList; 
     results.count = filteredList.size(); 
     return results; 
    } 

    @Override 
    protected void publishResults(CharSequence constraint, FilterResults results) { 
     adapter.mItems = originalList; 
     if(results.count > 0) { 
      filteredIt.clear(); 
      filteredIt.addAll((ArrayList<SalesProductsItems>) results.values); 
      adapter.notifyDataSetChanged(); 
     } else { 
      filteredIt.clear(); 
      filteredIt.addAll(adapter.mItems); 
      adapter.notifyDataSetChanged(); 
     } 
    } 
} 

Answer 3

我想補充到ololoking答案。 在MainActivity還應加上下面的代碼，以便它會工作：

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    getMenuInflater().inflate(R.menu.menu_layout, menu); 

    MenuItem searchItem = menu.findItem(R.id.action_search); 
    SearchView searchView = (SearchView) MenuItemCompat.getActionView(searchItem); 
    SearchManager manager = (SearchManager) getSystemService(Context.SEARCH_SERVICE); 
    searchView.setIconifiedByDefault(true); 
    searchView.setOnQueryTextListener(this); 
    return super.onCreateOptionsMenu(menu); 

} 

感謝ololoking你的答案。它幫助了我。

Answer 4

從另一方面肯定的回答做的時候，我現在已經在我FlexibleAdapter庫中實現一個快速異步濾波器使用AsyncTask，表現都非常好，大名單，有動畫呢！ 該適配器可配置爲啓用/禁用過濾結果中的屬性，以在必要時提高速度。另一大優勢還在於界面仍然對用戶做出響應。

在運行Android 6的我的三星S3中完成的測試：從10.450項目的起始列表開始，從後臺進程開始的那一刻起，需要花費大約1秒來篩選一個字符並選擇3.890項目。

我也做了一個Wiki page與所有的細節使用過濾器與適配器。