Question

我想实现reclyerview以表现如下默认情况下，项目为灰色，另一个按钮隐藏，直到按钮添加点击：

如果展开任何其他项目，则扩展会在每个列表中发生一个项目单击下一个项目将首先关闭所有打开的项目，然后打开新项目：

我试图实现它，但每次点击单个项目并进行扩展时，即使单击加号按钮增加了数字，列表中的其他项目也不会扩展。

同样，扩展可以显示在所有项目上，而在引用时，每次点击只展开一个项目。

这是我的代码

public class SalesProductsAdapter extends  

RecyclerView.Adapter<SalesProductsAdapter.Vh>
    implements   
     TextWatcher,Filterable,View.OnClickListener,AdapterView.OnItemClickListener  
   {

   public List<SalesProductsItems> mItems = new  ArrayList<SalesProductsItems>();
   public static List<SalesProductsItems> filteredIt = new ArrayList<SalesProductsItems>();

   @Override
public Vh onCreateViewHolder(ViewGroup parent, int viewType) {
    View v = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.selling_screen_sellitems, parent, false);

    Vh vh = new Vh(v);
    return vh;
}

@Override
public void onBindViewHolder(final Vh holder, final int position) {
    final SalesProductsItems cl = filteredIt.get(position);
    if(pitems != null && pitems.size() > 0){
        for(int j = 0; j < pitems.size(); j++){
            Pending_Items _pitems = pitems.get(j);
            long proid = cl.getProdid();
            long _proid = _pitems.getProdloc();
            if(proid == _proid){
                prodname = cl.getProduct();
                qty[0] = new BigDecimal(_pitems.getQty()).intValue();
                unit[0] = _pitems.getPrice();
            } else {
                prodname = cl.getProduct();
                qty[0] = new BigDecimal(cl.getQuantity()).intValue();
                unit[0] = cl.getUnit();
            }
        }
    } else {
        prodname = cl.getProduct();
        qty[0] = new BigDecimal(cl.getQuantity()).intValue();
        unit[0] = cl.getUnit();
    }
    items = pitems.size();
    if(items > 0)
        imgnext.setVisibility(View.VISIBLE);
    else
        imgnext.setVisibility(View.GONE);

    holder.txtproduct.setText(prodname);
    updateViews(qty[0], holder);

    if(qty[0] > 0){
        System.out.println(" qty is " + s_qty);
        holder.imgminus.setVisibility(View.GONE);
        holder.imgadd.setVisibility(View.GONE);
        holder.txtqty.setText(s_qty[0]);
        holder.txtunit.setText(s_unit);
        holder.txtsubtotal.setText(s_subtotal[0]);
    } else {
        holder.imgminus.setVisibility(View.GONE);
        holder.txtqty.setVisibility(View.GONE);
        holder.txtunit.setText(s_unit);
        holder.txtsubtotal.setVisibility(View.GONE);
    }

    holder.imgadd.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            qty[0] += 1;
            if(Products.checkQty(context,cl.getProdid(),qty[0])) {
                if (qty[0] == 1) {
                    s_qty[0] = String.valueOf(qty[0]);

                    holder.txtqty.setText(s_qty[0]);
                    holder.txtqty.setVisibility(View.VISIBLE);
                    holder.imgminus.setVisibility(View.VISIBLE);

                    process_item(cl, holder,position);
                    changeBg(holder,qty[0]);

                    holder.txtsubtotal.setVisibility(View.VISIBLE);
                } else {
                    s_qty[0] = String.valueOf(qty[0]);
                    holder.txtqty.setText(s_qty[0]);
                    process_item(cl, holder,position);
                    holder.txtsubtotal.setVisibility(View.VISIBLE);
                }
            } else {
                Toast.makeText(context,cl.getProduct() + " " + context.getResources().getString(R.string
                        .strsalesquantityerror1) +
                        " " + Products.getItemOnHand(context,String.valueOf(cl.getProdid())) + " " + context.getResources()
                        .getString(R.string.strsalesquantityerror2), Toast.LENGTH_LONG).show();
            }
        }
    });

    holder.layview.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if(holder.imgminus.getVisibility() == View.VISIBLE){
                holder.imgminus.setVisibility(View.GONE);
                if(qty[0] == 0) {
                    holder.imgadd.setVisibility(View.VISIBLE);
                    holder.txtqty.setVisibility(View.GONE);
                }
                else {
                    holder.txtqty.setVisibility(View.VISIBLE);
                    holder.imgadd.setVisibility(View.GONE);
                    holder.txtqty.setText(s_qty[0]);
                }
            } else {
                Intent intent = new Intent(context,SingeItem.class);
                intent.putExtra(Constants.SOURCE,Constants.SALETYPE_SALE);
                intent.putExtra(Products.PRODUCTNAME,cl.getProdid());
                intent.putExtra(Products.ID, position);
                context.startActivity(intent);
            }
        }
    });

    holder.txtqty.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if(holder.imgadd.getVisibility() == View.GONE){
                holder.txtqty.setText(s_qty[0]);
                holder.imgadd.setVisibility(View.VISIBLE);
                holder.imgminus.setVisibility(View.VISIBLE);
            }
        }
    });

}

// Return the size of your dataset (invoked by the layout manager)
@Override
public int getItemCount() {
    return filteredIt.size();
}

@Override
public long getItemId(int arg0){
    return 0;
}


 private void updateViews(int qt, Vh holder){
    double un = unit[0];
    double st = new BigDecimal(qt).multiply(new BigDecimal(un)).doubleValue();
    s_qty[0] = String.valueOf(qt);
    s_subtotal[0] =  new BigDecimal(st).setScale(2, RoundingMode.HALF_UP).toString();

    s_subtotal[0] = currency + " " + new BigDecimal(subtotal[0]).setScale(2, RoundingMode.HALF_UP).toString();
    s_unit = currency+" "+new BigDecimal(unit[0]).setScale(2, RoundingMode.HALF_UP).toString();

    holder.txtsubtotal.setText(s_subtotal[0]);
    holder.txtunit.setText(s_unit);
    holder.txtsubtotal.setVisibility(View.VISIBLE);
    if(qt > 0)
        imgnext.setVisibility(View.VISIBLE);
    else
        imgnext.setVisibility(View.GONE);

    gtotal += subtotal[0];
    txtt.setText(currency + " " + new BigDecimal(gtotal).setScale(2, RoundingMode.HALF_UP).toString());
    txti.setText("/ " + items + " " + context.getString(R.string.stritems));
}


  }

Answer 1

1）如果你想只显示/隐藏一个元素，那么这个元素可以正常工作

<强>步骤1）创建一个变量并将其值设置为= -1; int currentPosition = -1;

<强>步骤2）在绑定viewHolder上，在itemClick上将currentPosition更新为持有者位置

onBindViewHolder(ViewHolder v,int position)
            {
              view.Onclick(...{currentPosition=position;});
              if(currentPosition==position)
                view.setVisiblity(Visible);
              else
               view.setVisibility(Gone);  
           }

2）如果您想在任何按钮上显示更多项目，请点击

创建2个arrayList，第一个是arrayList存储总值，第二个是 arrayList只显示holder中的少数元素;
现在点击按钮，将所有元素添加到其他arrayList并通知。

RecylerView项目视图隐藏/显示

1 个答案: