android-如何筛选RecyclerView适配器

Question

我一个RecyclerView适配器类，我想我的过滤列表，我想我的过滤列表基础上List类，这是我的适配器类：

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> implements View.OnClickListener { 
private LayoutInflater inflater; 
private List<FeedItem> list; 
Context ctx; 

public MyAdapter(Context context, List<FeedItem> feedItemList) { 
    inflater = LayoutInflater.from(context); 
    this.list = feedItemList; 
} 


@Override 
public MyViewHolder onCreateViewHolder(ViewGroup parrent, int i) { 
    View view = inflater.inflate(R.layout.homepage_parts, parrent, false); 
    MyViewHolder holder = new MyViewHolder(view); 
    return holder; 
} 

@Override 
public void onBindViewHolder(final MyViewHolder viewHolder, int position) { 
    FeedItem item = list.get(position); 
    viewHolder.name.setText(item.getname()); 
} 



@Override 
public int getItemCount() { 
    if (list == null) 
     return 0; 
    else 
     return list.size(); 
} 



class MyViewHolder extends RecyclerView.ViewHolder{ 
    TextView name; 

    public MyViewHolder(View itemView) { 
     super(itemView); 
     name = (TextView) itemView.findViewById(R.id.tvname); 
     name.setTypeface(typeface); 


    } 

} 

}

如何在列表中筛选我的数据并更新适配器？

Answer 1

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> implements View.OnClickListener { 
private LayoutInflater inflater; 
private List<FeedItem> list; 
private List<FeedItem> copyList; 
Context ctx; 

public MyAdapter(Context context, List<FeedItem> feedItemList) { 
    inflater = LayoutInflater.from(context); 
    this.list = feedItemList; 
    this.copyList = feedItemList; 
} 

public void filter(String charText) { 
    charText = charText.toLowerCase(Locale.getDefault()); 
    list.clear(); 
    if (charText.length() == 0) { 
     list.addAll(copyList); 
    } 
    else 
    { 
     for (FeedItem feedItem : copyList) { 
      if (feedItem.getname().toLowerCase(Locale.getDefault()).contains(charText)) { 
       list.add(feedItem); 
      } 
     } 
    } 
    notifyDataSetChanged(); 
} 

@Override 
public MyViewHolder onCreateViewHolder(ViewGroup parrent, int i) { 
    View view = inflater.inflate(R.layout.homepage_parts, parrent, false); 
    MyViewHolder holder = new MyViewHolder(view); 
    return holder; 
} 

@Override 
public void onBindViewHolder(final MyViewHolder viewHolder, int position) { 
    FeedItem item = list.get(position); 
    viewHolder.name.setText(item.getname()); 
} 



@Override 
public int getItemCount() { 
    if (list == null) 
     return 0; 
    else 
     return list.size(); 
} 



class MyViewHolder extends RecyclerView.ViewHolder{ 
    TextView name; 

    public MyViewHolder(View itemView) { 
     super(itemView); 
     name = (TextView) itemView.findViewById(R.id.tvname); 
     name.setTypeface(typeface); 


    } 

} 

Answer 2

可以使用

public int getItemViewType(int position) 

方法来获取类型在回收站视图中的每个项目。 这将为您提供将由getView（int，View，ViewGroup）为指定项目创建的视图类型。

Answer 3

实现您的适配器，并在您的活动可筛选添加搜索查看与setOnQueryTextListener ...

this链接可以帮助您了解过滤用的例子。

Answer 4

public class AdapterData extends RecyclerView.Adapter<AdapterData.MyViewHolder> { 
    private Context mContext; 
    Data object; 
    private ArrayList<Data> mArrayList; 
    private ArrayList<Data> mFilteredList; 
    public class MyViewHolder extends RecyclerView.ViewHolder { 
     public TextView title, count,yayayan; 
     public ImageView thumbnail, imgLike; 

     public MyViewHolder(View view) { 
      super(view); 
      title = (TextView) view.findViewById(R.id.title); 
      yayayan = (TextView) view.findViewById(R.id.yayasan); 
      count = (TextView) view.findViewById(R.id.count); 
      thumbnail = (ImageView) view.findViewById(R.id.thumbnail); 
      imgLike = (ImageView) view.findViewById(R.id.imgLike); 
     } 
    } 


    public AdapterData(Context mContext, ArrayList<Data> arraylist) { 
     this.mContext = mContext; 
     mArrayList = arraylist; 
     mFilteredList = arraylist; 

     } 


    @Override 
    public AdapterData.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     View itemView = LayoutInflater.from(parent.getContext()) 
       .inflate(R.layout.item_data, parent, false); 

     return new AdapterData.MyViewHolder(itemView); 
    } 

    @Override 
    public void onBindViewHolder(final AdapterData.MyViewHolder holder, int position) { 
     final Data d = mFilteredList.get(position); 
     holder.title.setText(d.getNama_data()); 
     holder.yayayan.setText(d.getNama_yayasan()); 
     holder.count.setText(d.getTtl_like() + " Like"); 


    } 
    public void filter(String charText) { 
     charText = charText.toLowerCase(Locale.getDefault()); 
     if (charText.length() == 0) {//jika string kosong 
      mFilteredList = mArrayList; 
     } else {//filter dan buat arraybaru dengan filter query model 
      ArrayList<Data> filteredList = new ArrayList<>(); 

      for (Data wp : mArrayList) { 
       if (wp.getNama_data().toLowerCase(Locale.getDefault()).contains(charText)) { 
        filteredList.add(wp); 
       } 
      } 
      mFilteredList = filteredList; 

     } 
     //memperbarui list adapter 
     notifyDataSetChanged(); 
    } 


    @Override 
    public int getItemCount() { 
     return mFilteredList.size(); 
    } 
} 

和你actity或片段发送ArrayList的数据集适配器时，我希望这样品可以帮助ü^^