Getview parameter “convertview” not null on new “position” parameter

Question

I\'m using an ArrayAdapter for a list of my own type of objects (only one type) and I give the user an option to create more items (thus creating more views for those items). At

Answer 1

A friend explained the problem to me and now it seems to work. Basically ListView only holds a small number of views and recycles them all the time. In my case I have a Nexus 4 and so it seems to have 7 views total because the 8th was always the one who started to cause trouble. What I was missing in my getView() was a condition checking for correlation between the position and the ID of the current item within the ArrayAdapter. Here is how it looks now that it works:

@Override
public View getView(int position, @Nullable View convertView, ViewGroup parent) {
    View v;
    PreviewItemHolder holder = null;

    // Initialize view if convertview is null
    if (convertView == null) {
        v = newView(parent, position);
    }
    // Populate from previously saved holder
    else {
        // If position and id of set do not match, this view needs to be re-created, not recycled
        if (((PreviewItemHolder) convertView.getTag()).set.getId() != position) {
            v = newView(parent, position);
        }
        else {
            // Use previous item if not null
            v = convertView;

            // Get holder
            holder = (PreviewItemHolder) v.getTag();
        }
    }

    // Populate if the holder is null (newly inflated view) OR
    // if current view's holder's flag is true and requires populating
     if (holder == null || holder.readPopulateFlag()) {
         bindView(position, v);
     }

    return v;
}