Question

显示这些项目，直到我在SearchView中键入任何内容，然后这些项目都消失了。

当我键入任何内容时，fullOffers的大小似乎变为零；因为当我将Toast消息放到for循环中时，它不会出现。

我将getFilter方法添加到RecyclerView的适配器中，并将其与fragemnt中的SearchView链接。

public class OffersAdapter extends RecyclerView.Adapter<OffersAdapter.ViewHolder> implements Filterable{

    Context context;
    List<offer> offers;
    List<offer> fullOffers;
    public OffersAdapter(List Offers,Context mContext){
        context = mContext;
        offers = Offers;
        fullOffers = new ArrayList<>(Offers);
    }


    public Filter getFilter() {
        return exampleFilter;
    }

    private Filter exampleFilter = new Filter() {
        @Override
        protected FilterResults performFiltering(CharSequence constraint) {
            ArrayList<offer> filteredList = new ArrayList<>();

            if (constraint == null || constraint.length() == 0) {
                filteredList.addAll(offers);
            } else {
                String filterPattern = constraint.toString().toLowerCase().trim();

                    Toast.makeText(context,"item added",Toast.LENGTH_LONG).show(); // the toast message appears

                for (offer item : fullOffers) {
                    Toast.makeText(context,"item added",Toast.LENGTH_LONG).show(); // it doesn't appear

                    if (item.getTitle().toLowerCase().contains(filterPattern)) {
                        filteredList.add(item);
                    }
                }
            }

            FilterResults results = new FilterResults();
            results.values = filteredList;


            return results;
        }

        @Override
        protected void publishResults(CharSequence constraint, FilterResults results) {
            offers.clear();
            offers.addAll((List) results.values);
            notifyDataSetChanged();
        }
    };

}

我希望这些物品被加载到“要约”列表中并出现

Answer 1

尝试更改publishResults方法，如下所示：

$this->session->set_flashdata('pesan','Maaf Username dan Password Salah !');

在搜索框中输入任何内容时，为什么不显示项目？

1 个答案: