I have list view which uses base adapter class for each item view, when I make changes in one item of list view and scroll the list view the changed item sets to default value, I need to retain my values even after scrolling.

@Override

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

final ViewHolder holder;

if (convertView == null) {

convertView = l_Inflater.inflate(R.layout.dish, null);

holder = new ViewHolder();

//holder.check_out=(Button) convertView.findViewById(R.id.checkout);

holder.txt_itemName = (TextView) convertView.findViewById(R.id.name);

holder.txt_itemPrice = (TextView) convertView.findViewById(R.id.price);

holder.itemImage = (ImageView) convertView.findViewById(R.id.photo);

holder.quickAdd = (ImageView) convertView.findViewById(R.id.quickAdd);

holder.quickRemove=(ImageView) convertView.findViewById(R.id.quickRemove);

holder.txt_item=(TextView) convertView.findViewById(R.id.item);

holder.quantity=(TextView) convertView.findViewById(R.id.quantity1);

holder.dishLogo=(TextView) convertView.findViewById(R.id.dishLogo);

convertView.setTag(holder);

} else {

holder = (ViewHolder) convertView.getTag();

}

// holder.txt_item.setTag(position); 

final Integer dish_id = itemDetailsArrayList.get(position).getDishID();

final DishDetails obj = itemDetailsArrayList.get(position);

String quant=""+itemDetailsArrayList.get(position).getQuantity1();

holder.quantity.setText("   "+quant+" remaining");

holder.txt_itemName.setText(itemDetailsArrayList.get(position).getDishName());

holder.txt_itemPrice.setText(" \u20B9"+" "+itemDetailsArrayList.get(position).getDishPrice());

holder.itemImage.setScaleType(ScaleType.FIT_XY);

str=itemDetailsArrayList.get(position).getDishName();

char str1=str.charAt(0);

holder.dishLogo.setText(""+str1);

notifyDataSetChanged();

holder.quickAdd.setOnClickListener(new OnClickListener() {

public void onClick(View v) {

 ViewGroup parent = (ViewGroup) v.getParent();

            TextView tv = (TextView) parent.findViewById(R.id.item);

            int count = Integer.parseInt((String) holder.txt_item.getText());

            count++;

           

            holder.txt_item.setText(String.valueOf(count));

            i++;

            cartCount();

            notifyDataSetChanged();

}


});

holder.quickRemove.setOnClickListener(new OnClickListener() {

public void onClick(View v) {

 ViewGroup parent = (ViewGroup) v.getParent();

            TextView tv = (TextView) parent.findViewById(R.id.item);

            int count = Integer.parseInt((String) holder.txt_item.getText());


            if (count > 0) {

                count--;

                holder.txt_item.setText(String.valueOf(count));

               

                i--;

                cartCount();

               

            } 

            notifyDataSetChanged();

}

});

if(holder.txt_item.getText().toString()==""){

holder.txt_item.setText("0");

}

Float quantity = Float.parseFloat(holder.txt_item.getText().toString());

obj.setQuantity(quantity);

if(quantity==0.0){

// notifyDataSetChanged();

OrderStore.deleteOrderItem(dish_id);

}

else{

//String amount=itemDetailsArrayList.get(position).getDishPrice();

//int price=(int) (Integer.parseInt(amount)*quantity);

//amountCount(price);

//notifyDataSetChanged();

OrderStore.saveOrderItem(dish_id, obj);

}

notifyDataSetChanged();

return convertView;

}