Android Comment remplacer le filtre de mon ArrayAdapter?

Question

Hé les gars mon premier poste ici ... J'essaie d'écrire un filtre personnalisé pour filtrer l'arraylist dans mon arrayadapter de telle sorte que ma listview est filtrée quand je clique sur le bouton.

Par exemple, lorsque je clique sur mon bouton

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

Cependant, lorsque je clique sur mon bouton, mon application de manière inattendue. Voici mon code pour l'arrayadapter et le filtre. Aidez-moi, s'il vous plaît.

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; 
    } 
    }  
} 

Answer 1

Vous devez remplacer la méthode getCount() dans la classe ArrayAdapter.