Recyclerからアイテムを削除する方法ホルダークラス

Question

私はアンドロイドを新しくしました。現在、私はrecyclerViewの実装に取り​​組んでいます。問題は、onCreateContextMenuが呼び出された後にアイテムを削除したいということです。私はいくつかの問題は、私の削除オプションに適切な参照を取得しています。

ホルダークラス

public class UploadDrugsHolder extends RecyclerView.ViewHolder implements View.OnClickListener, View.OnCreateContextMenuListener, MenuItem.OnMenuItemClickListener { 
     //OUR VIEWS 
     UploadDrugsAdapter uploadDrugsAdapter; 
     TextView drugName; 
     ImageView drugImage; 
     ItemClickListener itemClickListener; 
     ArrayList<UploadedDrugs> drugs; 
     public UploadDrugsHolder(View itemView) { 
      super(itemView); 
      this.drugName= (TextView) itemView.findViewById(R.id.shopName); 
      this.drugImage= (ImageView) itemView.findViewById(R.id.model_menu); 
      itemView.setOnClickListener(this); 
      itemView.setOnCreateContextMenuListener(this); 
     } 

     public void setItemClickListener(ItemClickListener itemClickListener) { 
      this.itemClickListener=itemClickListener; 
     } 

     @Override 
     public void onClick(View v) { 
      this.itemClickListener.onItemClick(v,getLayoutPosition()); 
     } 

     @Override 
     public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) { 
      MenuItem myActionItem = menu.add("delete"); 
      myActionItem.setOnMenuItemClickListener(this); 
     } 

     @Override 
     public boolean onMenuItemClick(MenuItem item) { 
// what do i need to write here? 
      Toast.makeText(itemView.getContext(), "Drug deleted successfully", Toast.LENGTH_SHORT).show(); 
      return false; 
     } 

    } 

Answer 1

。
このようにする必要があります：

public class UploadedDrugsAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> { 

    private List<UploadedDrugs> dataList = new ArrayList<>(); 
    private OnClickUploadedDrugs event; 

    public UploadedDrugsAdapter (List<UploadedDrugs> dataList, OnClickUploadedDrugs event) { 
     this.dataList = dataList; 
     this.event = event; 
    } 

    public interface OnClickUploadedDrugs{ 
     void onClickUploadedDrugs(UploadedDrugs uploadedDrugs); 
    } 

    public void changeDataSet(List<UploadedDrugs> dataSet){ 
     dataList = dataSet; 
     notifyDataSetChanged(); 
    } 

    @Override 
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     View view = LayoutInflater.from(parent.getContext()) 
        .inflate(R.layout.your_xml_file, parent, false); 

     return new ViewHolderUploadedDrugs(view); 
    } 

    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { 
     try { 
      final UploadedDrugs model = dataList.get(position); 
      final ViewHolderUploadedDrugs vh = (ViewHolderUploadedDrugs) holder; 

      // configure view values 

      //Event 
      vh.itemView.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        if(event != null){ 
         event.onClickUploadedDrugs(model); 
        } 
       } 
      }); 
     }catch (Exception e){ 
      Log.e(getClass().getSimpleName(), "Erro ao exibir informaçeõs", e); 
     } 
    } 

    @Override 
    public int getItemCount() { 
     return (null != dataList ? dataList.size() : 0); 
    } 

    static class ViewHolderUploadedDrugs extends RecyclerView.ViewHolder { 

     TextView drugName; 
     ImageView drugImage; 


     ViewHolderUploadedDrugs(View itemView) { 
      super(itemView); 
      this.drugName= (TextView) itemView.findViewById(R.id.shopName); 
      this.drugImage= (ImageView) itemView.findViewById(R.id.model_menu); 
     } 
    } 

    public List<UploadedDrugs> getDataList() { 
     return dataList; 
    } 

    public void setEvent(OnClickUploadedDrugs event) { 
     this.event = event; 
    } 
} 

Answer 2

ような何か：私は常に同じファイルにアダプターとホルダーを置く

drugs.remove(position); 
notifyItemRemoved(position); 
notifyItemRangeChanged(position, drugs.size());