listview 通过筛选全部城市显示出搜索的城市

private List<Map<String, Object>> cityList;

adapter = new FilterAdapter(getContext(), cityList);//
adapter.getFilter().filter( "bj");
adapter.setFilterType(FilterAdapter.FILTER_BODY);
lvCitys.setAdapter(adapter);

public class FilterAdapter extends BaseAdapter implements Filterable {public static final int FILTER_HEAD = 0;// 从头开始过滤public static final int FILTER_FOOT = 1;// 从后开始过滤public static final int FILTER_BODY = 2;// 任意过滤private Context context;List<Map<String, Object>> cityList;private List<String> list = new ArrayList<String>();private List<String> spylist = new ArrayList<String>();private boolean needSort = false;// 是否需要排序private ArrayFilter filter;// 过滤器private int filterType = FILTER_BODY;// 过滤类别，默认从头开始过滤private Event mFilterFinish = new Event(EventType.FILTER_CITY_FINISH);private Event choseCity = new Event(EventType.CHOSE_CITY);public FilterAdapter(Context context, List<Map<String, Object>> obj) {this.context = context;cityList = obj;for (int i = 0; i < obj.size(); i++) {this.list.add(obj.get(i).get("name").toString());this.spylist.add(obj.get(i).get("spy").toString());}}// 返回false后Item间的分割线消失@Overridepublic boolean areAllItemsEnabled() {return false;}// 带有“－”的不可操作，通常和areAllItemsEnabled一起使用。@Overridepublic boolean isEnabled(int position) {if( position >= list.size()){return false;}return !list.get(position).startsWith("-");// 此处根据需求灵活处理}public int getCount() {return list.size();}public Object getItem(int position) {return list.get(position);}public long getItemId(int position) {return position;}public View getView(int position, View convertView, ViewGroup parent) {View v;final int p = position;if (convertView == null) {v = LayoutInflater.from(context).inflate(R.layout.list_tip_item, parent, false);} else {v = convertView;}TextView tv = (TextView)v.findViewById(R.id.list_item_tip);if(tv != null)tv.setText(list.get(position));v.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View arg0) {String name = list.get(p);int code = getAdminCodeByName(name);if (code != 0) {SearchMod.Instance().setSearchAdminName(name);SearchMod.Instance().setSearchAdminCode(code);}String spy = getAdminSpyByName(name);_Admin admin = new _Admin(name, spy, code);AdminManager am = new AdminManager();if (am != null)am.insert(admin);choseCity.addParam("cityname", name);EventManager.trigger(choseCity);}});return v;}private String getAdminSpyByName(String name) {String spy = null;for (int i = 0; i < cityList.size(); i++) {if (cityList.get(i).get("name").toString().equals(name)) {spy = cityList.get(i).get("spy").toString();break;}}return spy;}private int getAdminCodeByName(String name) {int code = 0;for (int i = 0; i < cityList.size(); i++) {if (cityList.get(i).get("name").toString().equals(name)) {code = (Integer) cityList.get(i).get("id");break;}}return code;}public List<String> getList() {return list;}public void setList(List<String> list) {this.list = list;}public boolean isNeedSort() {return needSort;}public void setNeedSort(boolean needSort) {this.needSort = needSort;}private List<String> dosort(List<String> list) {Collections.sort(list, comparator);return list;}private Comparator<String> comparator = new Comparator<String>() {private final Collator collator = Collator.getInstance();public int compare(String s1, String s2) {return collator.compare(s1, s2);}};@Overridepublic Filter getFilter() {// TODO Auto-generated method stubif (filter == null) {filter = new ArrayFilter();}return filter;}public int getFilterType() {return filterType;}public void setFilterType(int filterType) {this.filterType = filterType;}private class ArrayFilter extends Filter {@Overrideprotected FilterResults performFiltering(CharSequence prefix) {// TODO Auto-generated method stubFilterResults results = new FilterResults();if (prefix == null || prefix.length() == 0) {// 没有过滤符就不过滤// new// ArrayList<String>()表示让ListView一开始的时候什么都没有,而不是全部显示到ListView中// new ArrayList<String>(list)表示一开始就让Item全部显示到ListView中ArrayList<String> l = new ArrayList<String>(list);results.values = l;results.count = l.size();} else {String prefixString = prefix.toString().toUpperCase();Log.i("FilterAdapter", "prefixString = " + prefixString);final ArrayList<String> values = new ArrayList<String>(list);final int count = values.size();ArrayList<String> newValues = new ArrayList<String>(list);for (int i = 0; i < count; i++) {final String value = values.get(i);// 原始字符串final String valueText = value.toString().toLowerCase();final String spy = spylist.get(i).toString();Log.i("FilterAdapter", "value = " + value);Log.i("FilterAdapter", "valueText = " + valueText);Log.i("FilterAdapter", "spy = " + spy);// 匹配核心代码，需要自己实现，这里只提供了基本的过滤类型switch (filterType) {case FILTER_HEAD:if (!valueText.startsWith(prefixString)) {// 过滤掉不需要的项newValues.remove(value);Log.i("FilterAdapter", "remove FILTER_HEAD " + value + ",lenght = " + newValues.size());}break;case FILTER_FOOT:if (!valueText.endsWith(prefixString)) {// 过滤掉不需要的项newValues.remove(value);Log.i("FilterAdapter", "remove FILTER_FOOT " + value + ",lenght = " + newValues.size());}break;case FILTER_BODY:if (spy.indexOf(prefixString) == -1 && valueText.indexOf(prefixString) == -1) {newValues.remove(value);Log.i("FilterAdapter", "remove FILTER_BODY " + value + ",lenght = " + newValues.size());} /*else if (valueText.indexOf(prefixString) != -1) {// 过滤掉不需要的项newValues.add(value);Log.i("FilterAdapter", "add FILTER_BODY valueText " + value + ",lenght = " + newValues.size());}*/break;default:break;}Log.i("FilterAdapter", "newValues.size() = " + newValues.size());}results.values = newValues;results.count = newValues.size();Log.i("FilterAdapter", "newValues.size() = " + newValues.size() +", results.count = " + results.count);}return results;}@Overrideprotected void publishResults(CharSequence constraint,FilterResults results) {// TODO Auto-generated method stublist = (List<String>) results.values;/*if (results.count > 0) {notifyDataSetChanged();} else {notifyDataSetInvalidated();}*/EventManager.trigger(mFilterFinish);}}}