android中数组适配器的自定义过滤器

Question

public class SpotAdapter extends ArrayAdapter<Spot> {

    private ArrayList<Spot> mFilteredList, mUnfilteredList;
    private Filter mFilter;

    public SpotAdapter(Context context, int resource, List<Spot> items) {
        super(context, resource, items);
        mUnfilteredList = (ArrayList<Spot>) items;
        mFilteredList = (ArrayList<Spot>) items;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        View v = convertView;

        if (v == null) {
            LayoutInflater vi;
            vi = LayoutInflater.from(getContext());
            v =  vi.inflate(R.layout.record_row, null);
        }

        Spot p = (Spot) mFilteredList.get(position);

        if (p != null) {
            TextView nameView = (TextView) v.findViewById(R.id.name);
            TextView addressView = (TextView) v.findViewById(R.id.address);
            TextView typeView = (TextView) v.findViewById(R.id.type);
            TextView contactView = (TextView) v.findViewById(R.id.contact);
            ImageView starBtn = (ImageView) v.findViewById(R.id.star);

            contactView.setVisibility(View.GONE);
            nameView.setText(p.name);
            addressView.setText(p.address);
            typeView.setText(p.type == 1 ? "Leisure" : "Shopping");
            starBtn.setTag("" + p.id);
            starBtn.setVisibility(p.isStar ? View.VISIBLE :  View.GONE);
        }

        return v;

    }

    @Override
    public Filter getFilter() {
        if(mFilter == null) {
            mFilter = new Filter() {

                @Override
                protected void publishResults(CharSequence constraint, FilterResults results) {
                    mFilteredList = (ArrayList<Spot>)results.values;
                    clear();
                    int count = mFilteredList.size();
                    for (int i=0; i<count; i++)
                    {
                        Spot s = (Spot)mFilteredList.get(i);
                        add(s);
                    }
//                  
//                  mFilteredList = (ArrayList<Spot>)results.values;
//                  notifyDataSetChanged();
                }

                @Override
                protected FilterResults performFiltering(CharSequence constraint) {
                    Log.d("test1","c "+constraint);
                    Log.d("test1","s "+mUnfilteredList.size());

                    FilterResults results = new FilterResults();
                    ArrayList<Spot> newList = new ArrayList<Spot>();              
                    for (Spot obj : mUnfilteredList) {
                        // Compare the custom object and add to list if match
                        if (constraint.equals("bookmark")) {  
                            if (obj.isStar == true)
                                newList.add(obj); 
                        } else if (constraint.equals("select all")) {
                            newList.add(obj);
                        }
                    }

                    Log.d("test1",""+newList.size());
                    results.values = newList;
                    results.count = newList.size();
                    return results;
                }
            };
        }
        return mFilter;
    }

}

以上是自定义过滤器，我的想法是有两个过滤器选项“bookMark”/“select all”，即全选显示原始列表，而bookMark只显示书签项。

问题是，如果我点击书签，然后我点击全选，结果仍然是书签项。

所以我记录了结果，我发现mUnfilteredList = (ArrayList<Spot>) items; 第二次会重新运行，所以未过滤的列表只是最后一个过滤结果，而不是保留原始列表。我该如何更改以解决问题？

感谢您的帮助

Answer 1

mFilteredList = new ArrayList(items);