当我添加不存在的字符串时，筛选后的ListView应该为空

Question

我有一个带有列表和EditText的"活动"，Edit Text用于输入一个字符串，因此列表将由该字符串组成。ListView基于BaseAdapter，包含F.类型的元素

public class lstAdaptF extends BaseAdapter implements Filterable {
Context ctx;
LayoutInflater lInflater;
ArrayList<F> objectsF;
ArrayList<F> origobjectsF;
...
private Filter FirmaBBFilter;
lstAdaptF(Context context, ArrayList<F> f) {
    ctx = context;
    objectsF = f;
    origobjectsF = f;
    lInflater = (LayoutInflater) ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
...
@Override
public Filter getFilter() {
    if (FFilter == null)
        FFilter = new FFilter();
    return FFilter;
}
...
private class FFilter extends Filter {
    @Override
    protected FilterResults performFiltering(CharSequence constraint) {
        FilterResults results = new FilterResults();
        if (constraint == null || constraint.length() == 0) {
            //get all inital list
            results.values = origobjectsF;
            results.count = origobjectsF.size();
            Log.d("lstAdaptF","empty filter");
        } else {
            // We perform filtering operation
            ArrayList<F> nF = new ArrayList<F>();
            for (F p : origobjectsF) {
                if (p.getName().toUpperCase().contains(constraint.toString().toUpperCase())){
                    nF.add(p);
                }
            }
            results.values = nF;
            results.count = nF.size();
        }
        return results;
    }

Everithing工作正常，例如列表包含字符串

Awork
Aworth
winter

我输入'w'：Awork，Aworth，冬季

我输入'wo'：Awork，Aworth

我输入"哇"：哇，哇——列表还是一样的，当它应该是空的！我该如何应对这种情况？非常感谢。

UPD:

@Override
    protected void publishResults(CharSequence constraint, FilterResults results) {
        // Now we have to inform the adapter about the new list filtered
        if (results.count == 0)
            notifyDataSetInvalidated();
        else {          
            objectsF = (ArrayList<F>) results.values;
            notifyDataSetChanged();
        }
    }

UPD2：

@Override
public Object getItem(int position) {
    return objectsF.get(position);
}
 @Override
public int getCount() {
    return objectsF.size();
} 
@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View view = convertView;
    FHolder holder = new FHolder();
    if (view == null) {
        view = lInflater.inflate(R.layout.itemf, parent, false);
        TextView tvAF = (TextView) view.findViewById(R.id.tvA);
...
        holder.tvAF = tvAF;
...
        view.setTag(holder);
    }
    else 
        holder = (FHolder) view.getTag();
    F p = getF(position);
    holder.tvAF.setText(p.a + "");
    ..
    return view;
}

Answer 1

看起来notifyDataSetInvalidated()有问题。尝试删除此if-else:

@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
    // Now we have to inform the adapter about the new list filtered       
    objectsF = (ArrayList<F>) results.values;
    notifyDataSetChanged();
}