Hola chicos, mi primera publicación aquí ... Estoy tratando de escribir un filtro personalizado para filtrar la lista de arrays en mi adaptador de arrays de modo que mi vista de lista se filtre cuando hago clic en el botón.

Por ejemplo, cuando hago clic en mi botón

public void onClick(View arg0) {
            String abc = "abc";
            m_adapter.getFilter().filter(abc);
        }

Sin embargo, cuando hago clic en mi botón, mi aplicación finaliza inesperadamente. Aquí está mi código para el adaptador de matriz y el filtro. Por favor, ayúdame.

package com.ntu.rosemobile.searchlist;

public class ResultsAdapter extends ArrayAdapter<SearchItem> implements Filterable{

public ArrayList<SearchItem> subItems;
public ArrayList<SearchItem> allItems;
private LayoutInflater inflater;
private PTypeFilter filter;

public ResultsAdapter(Context context, int textViewResourceId, ArrayList<SearchItem> items) {

    super(context, textViewResourceId, items);
        this.subItems = items;
        this.allItems = this.subItems;
        inflater= LayoutInflater.from(context);
}

@Override
public Filter getFilter() {
    if (filter == null){
      filter  = new PTypeFilter();
    }
    return filter;
  }



//@Override
public View getView(int position, View convertView, ViewGroup parent) {
        View v = convertView;
        if (v == null) {

            v = inflater.inflate(R.layout.listrow, null);
        }
        SearchItem o = subItems.get(position);
        if (o != null) {
                TextView pname = (TextView) v.findViewById(R.id.productname);
                TextView neg = (TextView) v.findViewById(R.id.negNum);
                TextView pos = (TextView) v.findViewById(R.id.posNum);
                TextView neu = (TextView) v.findViewById(R.id.neuNum);

                WebImageView productPhoto = (WebImageView)v.findViewById(R.id.pPhoto);
                if(productPhoto!=null){
                    productPhoto.setImageUrl(o.getImageUrl().toString());
                    productPhoto.loadImage();
                }
                if(pname!= null){
                    pname.setText(o.getProductName().toString());
                }                    
                if (neg != null) {
                      String a =  "" + o.getNegativeReviews();
                      neg.setText(a);                            
                }
                if(neu != null){
                     String a =  "" + o.getNeutralReviews();
                     neu.setText(a);
                }
                if(pos != null){
                    String a =  "" + o.getPositiveReviews();
                    pos.setText(a);
                }
        }
        return v;
}

private class PTypeFilter extends Filter{


    @SuppressWarnings("unchecked")
    @Override
    protected void publishResults(CharSequence prefix,
                                  FilterResults results) {
      // NOTE: this function is *always* called from the UI thread.
       subItems =  (ArrayList<SearchItem>)results.values;

        notifyDataSetChanged();
    }

    @SuppressWarnings("unchecked")
    protected FilterResults performFiltering(CharSequence prefix) {
          // NOTE: this function is *always* called from a background thread, and
          // not the UI thread. 

          FilterResults results = new FilterResults();
          ArrayList<SearchItem> i = new ArrayList<SearchItem>();

          if (prefix!= null && prefix.toString().length() > 0) {

              for (int index = 0; index < allItems.size(); index++) {
                  SearchItem si = allItems.get(index);
                  if(si.getPType().compareTo(prefix.toString()) == 0){
                    i.add(si);  
                  }
              }
              results.values = i;
              results.count = i.size();                   
          }
          else{
              synchronized (allItems){
                  results.values = allItems;
                  results.count = allItems.size();
              }
          }

          return results;
    }
  }     
}