搜索 ListView 标志的功能 - 无法解析方法“getFilter()”

Question

我一直在尝试对 listView 执行简单搜索，我已经能够使用 Volley 填充它，但直到现在都无济于事。 它一直标记此 无法解析方法 'getFilter()

我也尝试过其他人提出的与同一搜索问题相关的问题，但 none 似乎对我有用，所以我别无选择，只能在这里 post 我的。 下面是我的代码

public class MainActivity extends Activity {

   private ListView mList;
   private List<Movie> movieList = new ArrayList<Movie>();
   EditText inputSearch;


    protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
           requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
           setContentView(R.layout.activity_main);

       mList = (ListView) findViewById(R.id.list);
       inputSearch = (EditText) findViewById(R.id.inputSearch);


           adapter = new CustomListAdapter(this, movieList);
           mList.setAdapter(adapter);

             fetchMovie(); 
             // A method i declared in the program to load data from server with  volley library which works fine

        //SEARCH TEXTCHANGE
        inputSearch.addTextChangedListener(new TextWatcher() {

             @Override
             public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
                   // When user changed the Text
                  MainActivity.this.adapter.getFilter().filter(cs);
                //FLAGS Cannot resolve method 'getFilter()' here
                }

             @Override
             public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
                                      int arg3) {
                  // TODO Auto-generated method stub

             }

             @Override
             public void afterTextChanged(Editable arg0) {
                 // TODO Auto-generated method stub
             }
          });




    }



}

这是很好地填充我的 listView 的 CustomListAdapter 代码

public class CustomListAdapter extends BaseAdapter {

        private Activity activity;
     private LayoutInflater inflater;
     private List<Movie> movieItems;
        private String[] bgColors;
        ImageLoader imageLoader = MyApplication.getInstance().getImageLoader();


         public CustomListAdapter(Activity activity, List<Movie> movieItems) {
             this.activity = activity;
             this.movieItems = movieItems;
             bgColors = activity.getApplicationContext().getResources().getStringArray(R.array.movie_serial_bg);
         }
         @Override
         public int getCount() {
                return movieItems.size();
         }

         @Override
        public Object getItem(int location) {
             return movieItems.get(location);
         }

            @Override
            public long getItemId(int position) {
               return position;
            }

         @Override
         public View getView(int position, View convertView, ViewGroup parent) {

            if (inflater == null)
              inflater = (LayoutInflater) activity
                 .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
             if (convertView == null)
                convertView = inflater.inflate(R.layout.list_row_image, null);

             if (imageLoader == null)
              imageLoader = MyApplication.getInstance().getImageLoader();
            NetworkImageView thumbNail = (NetworkImageView) convertView.findViewById(R.id.thumbnail);

             TextView serial = (TextView) convertView.findViewById(R.id.serial);
            TextView title = (TextView) convertView.findViewById(R.id.title);
            TextView rating = (TextView) convertView.findViewById(R.id.rating);
            TextView genre = (TextView) convertView.findViewById(R.id.genre);
            TextView year = (TextView) convertView.findViewById(R.id.releaseYear);

            // getting movie data for the row
            Movie m = movieItems.get(position);

            // thumbnail image
            thumbNail.setImageUrl(m.getThumbnailUrl(), imageLoader);

            // title
            title.setText(m.getTitle());

            // rating
             rating.setText("Rating: " + String.valueOf(m.getRating()));

            // genre
            String genreStr = "";
            for (String str : m.getGenre()) {
              genreStr += str + ", ";
              }
            genreStr = genreStr.length() > 0 ? genreStr.substring(0,
                 genreStr.length() - 2) : genreStr;
             genre.setText(genreStr);

            // release year
             year.setText(String.valueOf(m.getYear()));

             String color = bgColors[position % bgColors.length];
            serial.setBackgroundColor(Color.parseColor(color));




            return convertView;
     }
}

感谢任何能帮助我解决我做错了什么的人，因为这个小问题已经困扰我整个项目好几天了。

提前致谢！

Answer 1

在文本更改时调用下面的方法并将此方法放在适配器上，请始终检查电影数组列表中的 "searchText"

// Filter Class
        private void filter(String charText) {
            charText = charText.toLowerCase(Locale.getDefault());
            searchText = charText;
            Log.i("installed apps==", searchText);
            appsList.clear();
            if (charText.length() == 0) {
                appsList.addAll(arraylist);
            } else {
                for (AppPojo wp : arraylist) {
                    if (wp.getappName().toLowerCase(Locale.getDefault()).contains(charText)) {
                        appsList.add(wp);
                    }
                }

            }
            notifyDataSetChanged();
        }

Answer 2

"Cannot Resolve Method" getFilter()'。因为 BaseAdapter clas doesn’t have method getFilter(). But ArrayAdapter 有 getFilter() 方法。

您可以在 BaseAdapter class 上参考 Custom Listview Adapter with filter Android or How could i filter the listview using baseadapter Whosebug post 到 implement filter，或者如果可能的话，您可以从 BaseAdapter 切换到 ArrayAdapter。

Answer 3

  public class AdapterClass extends BaseAdapter implements Filterable
  {
    public Filter getFilter() {
     return  new Filter(){

        @Override
        protected Filter.FilterResults performFiltering(CharSequence constraint)
        {
           //This function performs filtering in worker thread
           // And return Filter.FilterResults

         }

        @Override
        protected void publishResults(CharSequence constraint, Filter.FilterResults results)
        {
                // update list from filter Result
                // and call notifyDataSetChanged();

        }
    };

  }
}