ListView的查看返回持有者重复的行多次 [英] ListView View Holder returning duplicate rows multiple times

问题描述

下面是我的code，

查看holder类：

private class ViewHolder {
            TextView tv1;
            TextView tv2;
            TextView tv3;
            TextView tv4;
            TextView tv5;
            TextView tv6;
            TextView tv7;
            TextView tv8;
            TextView tv9;
            TextView tv10;
            TextView tv11;
            TextView tv12;
            TextView tv13;
            TextView tv14;

            EditText edit_qty;
            Button btnbonus;
            Button btnremove;
        }

自定义的ListView适配器getView（）：

ListView Custom Adapters getView() :

@Override
        public View getView(final int position, View convertView,
                ViewGroup parent) {
            ViewHolder holder = null;
            View view = convertView;
            if(view == null){
                view = lInflater.inflate(R.layout.add_productqty_listitem, parent,
                        false);
                Typeface font = Typeface.createFromAsset(ctx.getAssets(),
                        "gothic.ttf");
                holder = new ViewHolder();
                final ProductInfo product = data.get(position);
                ctx.mProductIdList.add(product.getProductId());
                try {
                    holder.tv1 = (TextView) view
                            .findViewById(R.id.add_product_label);
                    holder.tv1.setText(product.getProductName());
                    holder.tv1.setTypeface(font);
                    holder.tv1.setVisibility(View.VISIBLE);
                    holder.tv2 = (TextView) view
                            .findViewById(R.id.Product_Code_label);
                    holder.tv2.setTypeface(font);
                    holder.tv2.setVisibility(View.VISIBLE);
                    ...............
                    ...............
                    holder.edit_qty.setVisibility(View.VISIBLE);
                    view.setTag(holder);

                } catch (Exception e) {
                    e.printStackTrace();
                }

            }else{
                holder = (ViewHolder) view.getTag();
            }
            return view;

        }

我不知道是否落实观点持有人的正确与否，具有的ListView已较早重复填充n个，你的帮助会心存感激

I dont know whether the implement of view holder is correct or not , ListView has n number of duplicates which has been populated earlier , your help will be thankfull

推荐答案

一旦你得到getTag或第一行initlization持有者对象设置的值。所以它应该如果... else条件检查后，
查看评论我也高职后在getview方法中提到，如果别的.. 说明书

Set the values once you get the holder object from getTag or first row initlization. so it should after if.. else condition checking Check the comment also i hve mentioned in getview Method after if.. else statment

@Override
            public View getView(final int position, View convertView,
                    ViewGroup parent) {
                ViewHolder holder = null;
                View view = convertView;
                if(view == null){
                    view = lInflater.inflate(R.layout.add_productqty_listitem, parent,
                            false);

                    holder = new ViewHolder();
                try{   Typeface font = Typeface.createFromAsset(ctx.getAssets(),
                            "gothic.ttf");
                        holder.tv1 = (TextView) view
                                .findViewById(R.id.add_product_label);

                        holder.tv1.setTypeface(font);

                        holder.tv2 = (TextView) view
                                .findViewById(R.id.Product_Code_label);
                        holder.tv2.setTypeface(font);

                        view.setTag(holder);

                    } catch (Exception e) {
                        e.printStackTrace();
                    }

                }else{
                    holder = (ViewHolder) view.getTag();
                }


     final ProductInfo product = data.get(position);
                    ctx.mProductIdList.add(product.getProductId());
      // set data , text and visibility option after getting holder from view's getTag()
holder.tv1.setText(product.getProductName());
                        holder.tv1.setVisibility(View.VISIBLE);
                        holder.tv2.setVisibility(View.VISIBLE);
                        ...............
                        ...............
                        holder.edit_qty.setVisibility(View.VISIBLE);
                return view;

这篇关于ListView的查看返回持有者重复的行多次的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！