搜索通过RecyclerView使用搜索查看

Question

我想通过RecyclerView搜索，我有List<BaseOfCards>（BaseOfCards是我的getter &二传手类） 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单，并在初始化MainActivity：

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

我需要什么，下一步该怎么做？让我的RecyclerViewAdapterimplement Filterable还是什么？或者只是在* RecyclerViewAdapter **中创建类filter，并从我的MainActivity中调用它？

Answer 1

我解决我的问题

1. 让我的课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. 请MainActivityimplements SearchView.OnQueryTextListener和改变方法onQueryTextChange：

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

Answer 2

使用一个autocompletetextview或一个EditText我处理这一个如下其中

public List<SalesProductsItems> mItems   

是初始列表项实例和。

public static List<SalesProductsItems> filteredIt 

在显示items.Since所述第一时间的过滤器的结果是不是空的mItems实例将等于filteredIt实例使用的实例（而丧失的初始列表）然后在publishResults方法mItems前右失去原始值，我将它与传递的实例originallist等同起来。希望它可以帮助别人

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

我想补充到ololoking答案。 在MainActivity还应加上下面的代码，以便它会工作：

@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); 

} 

感谢ololoking你的答案。它帮助了我。

Answer 4

从另一方面肯定的回答做的时候，我现在已经在我FlexibleAdapter库中实现一个快速异步滤波器使用AsyncTask，表现都非常好，大名单，有动画呢！ 该适配器可配置为启用/禁用过滤结果中的属性，以在必要时提高速度。另一大优势还在于界面仍然对用户做出响应。

在运行Android 6的我的三星S3中完成的测试：从10.450项目的起始列表开始，从后台进程开始的那一刻起，需要花费大约1秒来筛选一个字符并选择3.890项目。

我也做了一个Wiki page与所有的细节使用过滤器与适配器。