Question

我创建了自己的适配器，扩展了BaseAdapter类。适配器方法已实施且工作正常。

然后我将Implements Filterable添加到此类并实现其方法：

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

        @Override
        protected void publishResults(CharSequence constraint, FilterResults results) {
            // has the filtered values
            elements = (ArrayList<DictionaryListElement>) results.values;
            // notifies the data with new filtered values. Only filtered
            // values will be shown on the list
            notifyDataSetChanged();
        }

        @Override
        protected FilterResults performFiltering(CharSequence constraint) {
            FilterResults results = new FilterResults();
            Locale locale = new Locale("KK");

            if (mOriginalValues == null) {
                mOriginalValues = new ArrayList<DictionaryListElement>(elements); // saves                                                                          // mOriginalValues
            }

            if (constraint == null || constraint.length() == 0) {

                /* CONTRACT FOR IMPLEMENTING FILTER : set the Original values to result which will be returned for publishing */
                results.count = mOriginalValues.size();
                results.values = mOriginalValues;
            } else {
                ArrayList<DictionaryListElement> filteredArrayList = new ArrayList<DictionaryListElement>();

                String searchword = constraint.toString();
                searchword = searchword.toLowerCase(locale);


                for (int i = 0; i < mOriginalValues.size(); i++) {
                    String word = mOriginalValues.get(i).getWord();
                    if (word.toLowerCase(locale).startsWith(searchword)) {
                        filteredArrayList.add(mOriginalValues.get(i));
                    }
                }
                // set the Filtered result to return
                results.count = filteredArrayList.size();
                results.values = filteredArrayList;
            }

            return results;
        }
    };

    return filter;
}

然后我在我的活动中添加了SearchView并添加到了我的活动implements OnQueryTextListener

然后我在菜单中添加了SearchView：

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);

    search = new SearchView(getActionBar().getThemedContext());
    search.setIconified(false);
    search.setSubmitButtonEnabled(false);
    search.setOnQueryTextListener(this);
    search.setQueryHint(getString(R.string.enter_the_word));

    menu.add(0, 1, 1, null)
            .setIcon(android.R.drawable.ic_search_category_default)
            .setActionView(search)
            .setShowAsAction(
                    MenuItem.SHOW_AS_ACTION_IF_ROOM
                            | MenuItem.SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW);
    return true;
}

然后我实现onQueryTextChange方法：

@Override
public boolean onQueryTextChange(String newText) {
    // TODO Auto-generated method stub
    if (TextUtils.isEmpty(newText)) {
        dictionaryList.clearTextFilter();
    } else {
        dictionaryList.setFilterText(newText);
    }
    return true;
}

dictionaryList是LisView。

当我启动应用程序并在设备中键入文本时，它什么也没做！我做错了什么？

Answer 1

我找到了解决方案。我需要写：

if (TextUtils.isEmpty(newText)) {
        dictionaryList.clearTextFilter();
    } else {
        //dictionaryList.setFilterText(newText);
        dictionaryList.setSelectionAfterHeaderView();
        DictionaryListAdapter adapter = (DictionaryListAdapter) dictionaryList.getAdapter();
        adapter.getFilter().filter(newText);
    }

在onQueryTextChange

内

Android listview适配器不会过滤

1 个答案: