Я хочу изменить количество просмотров текста, чтобы отразить количество определенного элемента. Но при нажатии кнопок добавления и добавления функция setText (), похоже, не работает. Вот мой класс адаптера

public class ItemAdapter extends ArrayAdapter<String>{
    Context context;
    int[] images,rate,quant;
    String[] names;
    ImageButton add, sub;
    ViewHolder holder; // Since will be accessed inside onclick
    Integer count1=0;

    HashMap<String,Integer> positiveNumbers = new HashMap<String,Integer>();
    Integer count=0;

    static class ViewHolder { 
        public TextView textView;
        public ImageView imageView;
        public TextView number;
        public TextView rates;
        public String uniqueKey;

    } 

    public ItemAdapter(Context c, String[] items, int quantity[], int[] rate, int[] img) {
        // TODO Auto-generated constructor stub 
        super(c, R.layout.item_fooditems, R.id.tvitemname, items);
        this.context = c;
        this.images = img;
        this.names = items;
        this.rate=rate;
        this.quant=quantity;
    } 

    @Override 
    public View getView(final int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub 
        View row = convertView;
        // reuse views 

        if (row == null) {
            LayoutInflater inflater = (LayoutInflater) context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            row = inflater.inflate(R.layout.item_fooditems, parent, false);
            ViewHolder viewHolder = new ViewHolder();
            viewHolder.imageView = (ImageView) row.findViewById(R.id.ivimage);
            viewHolder.textView = (TextView) row.findViewById(R.id.tvitemname);
            viewHolder.number = (TextView)row.findViewById(R.id.tvquantity);
            viewHolder.rates = (TextView)row.findViewById(R.id.tvprice);
            viewHolder.uniqueKey = String.valueOf(position);
            add = (ImageButton) row.findViewById(R.id.bincrement);
            add.setTag(position);
            sub = (ImageButton) row.findViewById(R.id.bdecrement);
            sub.setTag(position);
            row.setTag(viewHolder);

        } 
        holder = (ViewHolder) row.getTag();  //keeping one global memory
        holder.imageView.setImageResource(images[position]);
        holder.textView.setText(names[position]);
        holder.rates.setText(Integer.toString(rate[position]));
        holder.number.setText(Integer.toString(quant[position]));
        holder.number.setText("x");
        add.setOnClickListener(new OnClickListener() {
            @Override 
            public void onClick(View v) {
                // TODO Auto-generated method stub  
                quant[position]=quant[position]+1;
                count1 +=1;
                //holder.number.setText(Integer.toString(quant[position]));
                holder.number.setText(count1.toString());
                Toast.makeText(context, Integer.toString(quant[position]), Toast.LENGTH_SHORT).show();
                Log.d("Quantity",Integer.toString(quant[position]));
                positiveNumbers.put(holder.uniqueKey,count); //Key -> String.valueOf(position) and Value -> int count
            } 
        }); 

        sub.setOnClickListener(new OnClickListener() {
            @Override 
            public void onClick(View v) {
                // TODO Auto-generated method stub 
                quant[position]--;
                Toast.makeText(context, Integer.toString(quant[position]), Toast.LENGTH_SHORT).show();
                holder.number.setText(Integer.toString(quant[position]));
                positiveNumbers.put(holder.uniqueKey,count);   //Key -> String.valueOf(position) and Value -> int count
            } 
        }); 

        return row;
    } 


     public HashMap<String, Integer> getPositiveNumbers()
     {
       return positiveNumbers;
     }


}

Какие модификации требуются?