Filtering a ListView with SearchView and custom adapter

问题

I've been unable to get my ListView to sort. When I type in the SearchView, nothing happens. My ListView has no changes. I've been comparing examples found here and elsewhere with no luck. I've confirmed through debugging that the filter actually does work, I can see the filteredArray being populated with what filtered data, but again, no ListView change.

Here is what I have so far. In MainActivity.class..

public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);

        SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
        SearchView searchView = (SearchView) menu.findItem(R.id.action_search).getActionView();

        searchView.setSubmitButtonEnabled(false);
        searchView.setQueryHint("Enter #..");
        searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));

        SearchView.OnQueryTextListener queryTextListener = new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String s) {
                return false;
            }

            @Override
            public boolean onQueryTextChange(String s) {
                ListView listView = (ListView) findViewById(R.id.main_listView);
                listView.setTextFilterEnabled(true);

                if (s.isEmpty()) {
                    listView.clearTextFilter();
                } else {
                    customAdapter.getFilter().filter(s);
                }

                return true;
            }
        };

        searchView.setOnQueryTextListener(queryTextListener);

        return super.onCreateOptionsMenu(menu);
    }

I create the customAdapter object like this and listCustom contains all the CustomResults classes.

customAdapter = new CustomAdapter(MainActivity.this, listCustom);

CustomAdapter:

public class CustomAdapter extends BaseAdapter implements Filterable {
    private static ArrayList<CustomResults> customArrayList;
    private static ArrayList<CustomResults> filteredArrayList;

    private LayoutInflater mInflater;

    public CustomAdapter(Context context, ArrayList<CustomResults> results) {
        customArrayList = results;
        mInflater = LayoutInflater.from(context);
    }

    public int getCount() {
        return customArrayList.size();
    }

    public Object getItem(int position) {
        return customArrayList.get(position);
    }

    public long getItemId(int position) {
        return position;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (convertView == null) {
            convertView = mInflater.inflate(R.layout.custom_row, null);

            holder = new ViewHolder();
            holder.name = (TextView) convertView.findViewById(R.id.name);
            holder.num = (TextView) convertView.findViewById(R.id.number);


            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        holder.name.setText(customArrayList.get(position).getName());
        holder.num.setText(customArrayList.get(position).getNum());

        return convertView;
    }

    static class ViewHolder {
        TextView name;
        TextView num;
    }

    @Override
    public Filter getFilter() {
        Filter filter = new Filter() {

            @SuppressWarnings("unchecked")
            @Override
            protected void publishResults(CharSequence constraint, FilterResults results) {

                if (results.count == 0) {
                    notifyDataSetInvalidated();
                } else {
                    filteredArrayList = (ArrayList<CustomResults>) results.values;
                    notifyDataSetChanged();
                }

            }

            @Override
            protected FilterResults performFiltering(CharSequence constraint) {

                String filterString = constraint.toString().toLowerCase();
                FilterResults results = new FilterResults();

                int count = customArrayList.size();

                ArrayList<CustomResults> filteredList = new ArrayList<CustomResults>();

                for (CustomResults custom : customArrayList) {
                    filteredList.add(custom);
                }

                String filterableString ;

                for (int i = 0; i < count; i++) {
                    filterableString = customArrayList.get(i).getNum();
                    if (filterableString.toLowerCase().contains(filterString)) {
                        filteredList.add(customArrayList.get(i));
                    } else if (customArrayList.get(i).getName().toLowerCase().contains(filterString)) {
                        filteredList.add(customArrayList.get(i));
                    }
                }

                results.values = filteredList;
                results.count = filteredList.size();

                return results;
            }
        };

        return filter;

    }

回答1:

getView() and other functions retrieve always from customArrayList and never from filteredArrayList.

来源：https://stackoverflow.com/questions/24562269/filtering-a-listview-with-searchview-and-custom-adapter