Android ListView仅在单击按钮的最后一行

Question

I have the following code:

static class ViewHolder {
    TextView camera;
    TextView players;
    TextView max_players;
    ImageView privata;
    Button Buton;
}
ViewHolder holder;
@Override
public View getView(int position, View convertView, ViewGroup parent) {

    String variabile[] = getItem(position).split("\\s+");

    if(convertView == null)
    {
        LayoutInflater linflater = LayoutInflater.from(getContext());
        convertView = linflater.inflate(R.layout.custom_row, parent, false);
        holder = new ViewHolder();
        holder.camera = (TextView) convertView.findViewById(R.id.Nume);
        holder.players = (TextView) convertView.findViewById(R.id.players);
        holder.max_players = (TextView) convertView.findViewById(R.id.max_players);
        holder.privata = (ImageView) convertView.findViewById(R.id.privata);
        holder.Buton = (Button) convertView.findViewById(R.id.Buton);
        holder.camera.setText(variabile[0]);
        if (!variabile[1].equals("true")) {
            parola = false;
            holder.privata.setVisibility(View.INVISIBLE);
        }
        holder.players.setText(variabile[2]);
        holder.max_players.setText(variabile[3]);
        room_id = variabile[4];
        nume = variabile[5];
        holder.Buton.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                hash = new HashMap<String, String>();
                hash.put("name", nume);
                hash.put("room", room_id);
                if (intra) {
                    holder.Buton.setText("Iesi");
                    site = siteul + "/join";
                    intra = false;
                } else {
                    holder.Buton.setText("Intra");
                    site = siteul + "/leave";
                    intra = true;
                }
                new ATask().execute(site);
            }
        });
        convertView.setTag(holder);
    }
    else
        holder = (ViewHolder) convertView.getTag();
    return convertView;
}

I'm trying to access a row from an AsyncTask on PostExecute and modify it like this:

TextView players_mare = holder.players;
players_mare.setText(rez.substring(2));

No matter the button pressed it seems to modify the textview of the last item in the list.

Answer 1

This is happening because you are using holder . After rendering complete ListView it has reference of the last item in the ListView , so only last item is updated irrespective of the item on which button was clicked. You need to pass the reference of item in which button was clicked to the ATask class.

1. Add

    holder.Buton.setTag(holder); 

   after

    convertView.setTag(holder); 

   in getView() method

2. Create a class level variable in ATask clas like this

    ViewHolder myHolder; 

3. Add this in ATask

    public ATask(ViewHolder view) { myHolder = view; } 

4. Change ATask call like this

    new ATask((ViewHolder) v.getTag()).execute(site); 

5. In PostExecute replace every holder with myHolder