Android：在RecyclerView上设置固定项目

Question

我有一个RecyclerView，当我点击第一个视图时，它添加了另一个视图，就像在图像中一样，我想要设置ID为“1”的“添加”视图固定在回收站的最后位置，而不是第一个。

我的适配器：

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

    private List<String> items = new ArrayList<>(); 

    public void addItem(String name) { 
     items.add(name); 
     notifyItemInserted(items.size() - 1); 
    } 

    public void removeItem(int position) { 
     items.remove(position); 
     notifyItemRemoved(position); 
     notifyItemRangeChanged(position, items.size()); 
    } 

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

     return new ViewHolder(view); 
    } 


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

    @Override 
    public void onBindViewHolder(ViewHolder holder, int position) { 
     holder.setEventNameName(i + ""); 
     if(position == 0) 
     { 
      holder.theLayout.setBackgroundColor(Color.parseColor("#7F9099")); 
      holder.eventName.setText("Add"); 
     } 

    } 
    static int i; 
    class ViewHolder extends RecyclerView.ViewHolder{ 

     public TextView eventName; 
     public RelativeLayout theLayout; 




     public ViewHolder(final View itemView) { 
      super(itemView); 
      eventName = (TextView)itemView.findViewById(R.id.eventName); 
      theLayout = (RelativeLayout)itemView.findViewById(R.id.backgroundevent); 

      theLayout.setId(++i); 

      theLayout.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        if (getAdapterPosition()>0){ 
         removeItem(getAdapterPosition()); 
        }else { 
         addItem(""); 
        } 
       } 
      }); 

     } 

     public void setEventNameName(String TheEventName){ 
      eventName.setText(TheEventName); 
     } 
    } 
} 

在活动：

final AddEventsAdapter AddContainer = new AddEventsAdapter(); 
    AddEventsRecycler.setLayoutManager(new LinearLayoutManager(this)); 
    AddEventsRecycler.setAdapter(AddContainer); 
    AddEventsRecycler.setItemViewCacheSize(666); 

    RecyclerView.ItemAnimator itemAnimator = new DefaultItemAnimator(); 
    itemAnimator.setAddDuration(1000); 
    itemAnimator.setRemoveDuration(1000); 
    AddEventsRecycler.setItemAnimator(itemAnimator); 

    AddContainer.addItem(""); 

Answer 1

我解决它通过创建自定义适配器，它允许一个页脚和标题，在这里是GitHub中的项目：https://github.com/u3breeze/android-RecyclerView-WithHeaderAndFooter

Answer 2

你尝试类似：

public void addItem(String name) { 
     if (items.size() != 0) { 
      removeItem(items.size() - 1); 
      items.add(name); 
      items.add("Add"); 
     } else 
      items.add("Add"); 

     notifyItemInserted(items.size() - 1); 
    } 

然后添加项目的id为items.size() -1

编辑： 改变，如果在下面的代码你的Holder类：

 if(position == items.size() - 1) 
    {  
     holder.theLayout.setBackgroundColor(Color.parseColor("#7F9099")); 
        holder.eventName.setText("Add"); 
       }