Question

我撰写了一份定制清单,改编文,以改变我数据的视觉方面。当我装上我的清单时,预期物品的出现会发生变化。当我提出看法时,其他项目将随意改变,直到最终清单中的每一项目都对其出庭作了修改。

From what I ve read on SO about this type of code, I know that the position field in
public View getView(int position, View convertView, ViewGroup parent)
does not necessarily map to my data structure, since Android re-uses old views. This seems to be the behavior I m struggling to work with.

更新采用“观点”方法,如文森特所示:

@Override
public View getView(int position, View convertView, ViewGroup parent)
{
    View rowView = convertView;
    if (rowView == null)
    {
        LayoutInflater inflater = LayoutInflater.from(context);
        rowView = inflater.inflate(R.layout.rowlayout, null);
        ViewHolder viewHolder = new ViewHolder();
        viewHolder.text = (TextView) rowView.findViewById(R.id.tv01);
        rowView.setTag(viewHolder);
    }

    ViewHolder holder = (ViewHolder) rowView.getTag();
    String s = names[position];
    holder.text.setText(s);
    if (s.startsWith("a"))
    {
        holder.text.setTextColor(0xff00ffff);
    }

    return rowView;
}

我需要修改的项目是静态的,这样,如果采取更好的办法,而不是在日常工作中加以改变,那也会奏效! 感谢您的任何帮助。

Answer 1

your layout is being reused by android so that is why you are getting this output.What you need to do is to have a class that will act as a static viewholder for each of your view and use it as tag .See this for reference

Answer 2

You re not modifying existing views. If convertView is not null that means Android is recycling the view instead of inflating it, but you still have to update it with the new values. Something like this will work:

public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;          

if(convertView == null) {
    convertView = mInflater.inflate(R.layout.rowlayout, null);
    holder = new ViewHolder();  
iii
else {
    holder = (ViewHolder) convertView.getTag();
iii
holder.title = (TextView) convertView.findViewById(R.id.tv01); 
convertView.setTag(holder);

return convertView;

iii

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