关于ListView滑动之后重复加载的问题

使用listview的缓存，将控件缓存之后。如果在if语句里将要设置的控件的值缓存，滑动之后会出现重复加载的问题。

目前在网上看大概有2种解决方案

1、不用缓存影响效率

public View getView(int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        convertView = LayoutInflater.from(context).inflate(
                R.layout.menu_finaldish, null);
        TextView dishname = (TextView) convertView// 显示菜的名称
                .findViewById(R.id.finaldish_name);
        TextView dishprice = (TextView) convertView// 显示菜的价格
                .findViewById(R.id.finaldish_price);
        TextView dishdiscount = (TextView) convertView// 显示菜的折扣
                .findViewById(R.id.finaldish_discount);
        TextView dishnum = (TextView) convertView// 显示菜的份数
                .findViewById(R.id.finaldish_num);
        TextView dishlittlesum = (TextView) convertView//显示菜的小计
                .findViewById(R.id.finaldish_littlesum);

        dishname.setText(finaldishlist.get(position).getName());
        dishprice.setText(Double.toString(finaldishlist.get(position)
                .getPrice()));
        dishdiscount.setText(Double.toString(finaldishlist.get(position)
                .getDiscount()));
        dishnum.setText(Integer.toString(finaldishlist.get(position).getNum()));
        dishlittlesum.setText(Double.toString(finaldishlist.get(position).getLittlesum()));
        return convertView;
    }

2、使用缓存，将赋值写在if语句外面

public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder viewHolder = null;
        if (convertView == null) {
            convertView = layoutInflater.inflate(R.layout.listitem1, null);
            viewHolder = new ViewHolder();
            viewHolder.textView = (TextView) convertView
                    .findViewById(R.id.textview1);
            convertView.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder) convertView.getTag();
        }
        viewHolder.textView.setText(lists.get(position).getBuscirclename());
        viewHolder.textView.setTextColor(Color.BLACK);
        return convertView;
    }