AutoCompleteTextView不显示下拉菜单

Question

我扩展了AutoCompleteTextView并覆盖了preformFiltering函数以便从数据库中获取结果。 我得到的结果，但没有显示。并且定制适配器中的getView永远不会被调用。 奇怪的是，如果我预加载项目（在init（）函数内），我可以看到他们... 可能任何人都可以指出我正确的解决方案？ 谢谢。

public class CityAutoCompleteTextView extends AutoCompleteTextView { 
private DataDatabase mCity; 
private CityAutoCompleteArrayAdapter mCityAutoCompleteAdapter; 
    private ArrayList<CityAutoCompleteListItem> mCityListItems; 
public CityAutoCompleteTextView(Context context) { 
    super(context); 
    init(); 
} 
    public CityAutoCompleteTextView(Context context, AttributeSet attrs) {  
    super(context, attrs); 
    init();  
    } 

    public CityAutoCompleteTextView(Context context, AttributeSet attrs, int defStyle) { 
    super(context, attrs, defStyle); 
    init();  
    } 
    public City getItem(int position) { 
    return mCityAutoCompleteAdapter.getItem(position).getCity(); 
    } 

    private void init() { 
    mCity = new DataDatabase(this.getContext()); 
    mCityListItems = new ArrayList<CityAutoCompleteListItem>(); 
    mCityAutoCompleteAdapter = new CityAutoCompleteArrayAdapter(this.getContext(), R.layout.autocomplete_list, mCityListItems); 
    this.setAdapter(mCityAutoCompleteAdapter); 
    } 

    @Override 
    protected void performFiltering(CharSequence text, int keyCode) { 
    String stext = text.toString(); 
    Cursor cur = mCity.getCitiesMatches(stext); 

    mCityListItems.clear(); 
    if (cur==null) { 
     mCityAutoCompleteAdapter.notifyDataSetChanged(); 
     return; 
    } 
    while(!cur.isAfterLast()) { 
     City city = new City(cur.getInt(0),cur.getString(1)); 
     CityAutoCompleteListItem item = new CityAutoCompleteListItem(city, "Unknown province/state",cur.getString(2)); 
     mCityListItems.add(item); 
     cur.moveToNext();  
    }; 
    cur.close(); 
    mCityAutoCompleteAdapter.notifyDataSetChanged(); 

    super.performFiltering(text, keyCode);  
    } 


} 

Answer 1

用mCityAutoCompleteAdapter替换了mCityListItems，现在它正在工作。