Question

我无法让我的ListView进行排序。当我输入SearchView时，没有任何反应。我的ListView没有任何变化。我一直在比较这里和其他地方的例子，没有运气。我已通过调试确认过滤器实际上有效，我可以看到filteredArray填充了过滤数据，但同样没有ListView更改。

这是我到目前为止所拥有的。在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);
    }

我像这样创建customAdapter对象，listCustom包含所有CustomResults类。

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;

    }

Answer 1

getView（）和其他函数总是从customArrayList检索，而不是从filteredArrayList检索。

使用SearchView和自定义适配器过滤ListView

1 个答案: