Java 在listview中获取搜索数据的问题

我已经在customadapter类中实现了filterable，我可以通过listview进行搜索，但是当我清空搜索框时，我的列表仍然显示最后一个搜索应用程序，而不是整个应用程序列表

mainactivity.java

 public class MainActivity extends ListActivity {
 List<ApplicationInfo> appList;
 ListAdapter listAdapter;
 PackageManager packageManager;
 Process suProcess;
 DataOutputStream os;
 ApplicationInfo info;
 EditText search;
 ArrayList<ApplicationInfo> applist;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    packageManager = getPackageManager();
    new LoadApplication().execute();

    search = (EditText) findViewById(R.id.searchView);
    search.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {
        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
            listAdapter.getFilter().filter(s.toString());
        }

        @Override
        public void afterTextChanged(Editable s) {

        }
    });
 }
 }

---

要添加搜索，您需要添加如下代码所示的过滤器：

 private class ItemFilter extends Filter {
        @Override
        protected FilterResults performFiltering(CharSequence constraint) {

            String filterString = constraint.toString().toLowerCase();

            FilterResults results = new FilterResults();

            final List<String> list = originalData;

            int count = list.size();
            final ArrayList<String> nlist = new ArrayList<String>(count);

            String filterableString ;

            for (int i = 0; i < count; i++) {
                filterableString = list.get(i);
                if (filterableString.toLowerCase().contains(filterString)) {
                    nlist.add(filterableString);
                }
            }

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

            return results;
        }

        @SuppressWarnings("unchecked")
        @Override
        protected void publishResults(CharSequence constraint, FilterResults results) {
            filteredData = (ArrayList<String>) results.values;
            notifyDataSetChanged();
        }

    }

私有类ItemFilter扩展了筛选器{
@凌驾
受保护的筛选器结果性能筛选（CharSequence约束）{
String filterString=constraint.toString（）.toLowerCase（）；
FilterResults results=新的FilterResults（）；
最终列表=原始数据；
int count=list.size（）；
最终ArrayList NLList=新ArrayList（计数）；
串滤器串；
for（int i=0；i

按照以下链接并在适配器中添加过滤器：

---

因为我是新的……你能给我看一些启动代码吗？我已经听说过这个方法很多…但是在如何实现它上……把我看作是新手，在这个和帮助后面的链接上面加上了。谢谢，现在我可以搜索了，但是当我清空我的搜索框时，我没有得到完整的列表，它仍然显示最后的搜索结果。

 public Filter getFilter() {

    if (filter == null)
    {
        filter=new ListFilter();
    }
    return filter;
}

 private class ItemFilter extends Filter {
        @Override
        protected FilterResults performFiltering(CharSequence constraint) {

            String filterString = constraint.toString().toLowerCase();

            FilterResults results = new FilterResults();

            final List<String> list = originalData;

            int count = list.size();
            final ArrayList<String> nlist = new ArrayList<String>(count);

            String filterableString ;

            for (int i = 0; i < count; i++) {
                filterableString = list.get(i);
                if (filterableString.toLowerCase().contains(filterString)) {
                    nlist.add(filterableString);
                }
            }

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

            return results;
        }

        @SuppressWarnings("unchecked")
        @Override
        protected void publishResults(CharSequence constraint, FilterResults results) {
            filteredData = (ArrayList<String>) results.values;
            notifyDataSetChanged();
        }

    }