listview 的复用问题

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在不考虑局部刷新的情况下：：：：：：：

每次listview在适配器里填充完数据后，当改变其中一个item的数据，
并上下滑动的时候会因为listview的复用问题导致这个或者其他的item的数据又变了回来，
这个可以用个hashmap来解决

首先在适配器里添加个hashmap

    private Context context;    private ArrayList<MemberPackageInfo> vp_list;    private HashMap<Integer, MemberPackageInfo> hm = new HashMap<Integer, MemberPackageInfo>();

 @Override    public View getView(final int position, View convertView, ViewGroup parent) {        ViewHolder holder = null;//        if(hm.get(position) == null){        if (convertView == null) {            holder = new ViewHolder();            convertView = View.inflate(context, R.layout.member_card_item_item, null);            holder.tv_member_card_plant_name = (TextView)                    convertView.findViewById(R.id.tv_member_card_plant_name);            holder.tv_member_card_price = (TextView)                    convertView.findViewById(R.id.tv_member_card_price);            holder.et_member_card_del = (EditText) convertView.findViewById(R.id.et_member_card_del);            holder.tv_member_card_residue = (TextView)                    convertView.findViewById(R.id.tv_member_card_residue);//            convertView.setTag(holder);//            hm.put(position, convertView);            convertView.setTag(holder);        } else {//            convertView = hm.get(position);            holder = (ViewHolder) convertView.getTag();        }        final MemberPackageInfo info = vp_list.get(position);        hm.put(position, info);///////        holder.tv_member_card_plant_name.setText(hm.get(position).product_name);        holder.tv_member_card_price.setText(hm.get(position).price + "元");        holder.tv_member_card_residue.setText("剩余" + hm.get(position).product_num);

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