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POandroid editText onTextChanged called dozens of times even when no text is changed
 

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  1. POandroid editText onTextChanged called dozens of times even when no text is changed
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    <p>I am implementing a shopping cart in my application. In my cart view I have a list of products with a editText so the user can change their quantities. I need to listen to the "quantity change" event so I can update my Cart object accordingly.</p> <p>I am trying to use onTextChanged event but its not working as expected. Just when I open my cart view the event is fired like dozens of times and breaks completely my product quantity values.</p> <p>How can I make sure the value is really changed?</p> <p>Here is my code:</p> <p><strong>My CartItemsListAdapter (responsible for rendering each row of the cart).</strong></p> <pre><code>public class CartItemsListAdapter extends ArrayAdapter&lt;CartItem&gt; implements OnClickListener{ private ArrayList&lt;CartItem&gt; cartItems; /** * view holder for caching the view elements */ static class CartItemViewHolder { TextView tvProductName; TextView tvShopName; TextView tvSubTotal; EditText edQuantity; Button btnRemoveFromCart; ImageView ivProduct; } /** * default constructor * @param context * @param textViewResourceId * @param cartItems */ public CartItemsListAdapter(Context context, int textViewResourceId, ArrayList&lt;CartItem&gt; cartItems) { super(context, textViewResourceId, cartItems); this.cartItems = cartItems; } @Override public View getView(int position, View convertView, ViewGroup parent) { CartItemViewHolder viewHolder; View v = convertView; if (v == null) { LayoutInflater vi = (LayoutInflater) getContext().getSystemService( Context.LAYOUT_INFLATER_SERVICE); v = vi.inflate(R.layout.cart_item, null); viewHolder = new CartItemViewHolder(); viewHolder.tvProductName = (TextView) v.findViewById(R.id.cart_item_product_name); viewHolder.tvShopName = (TextView)v.findViewById(R.id.cart_item_shop_name); viewHolder.tvSubTotal= (TextView)v.findViewById(R.id.cart_item_subtotal); viewHolder.edQuantity = (EditText)v.findViewById(R.id.cart_item_product_quantity); //viewHolder.btnRemoveFromCart = (Button)v.findViewById(R.id.cart_item_remove_item); viewHolder.ivProduct = (ImageView)v.findViewById(R.id.cart_item_product_image); v.setTag(viewHolder); }else{ viewHolder = (CartItemViewHolder) v.getTag(); } CartItem item = cartItems.get(position); if(item != null){ viewHolder.tvProductName.setText(item.getProduct().getName()); viewHolder.edQuantity.setText(Integer.toString(item.getQuantity())); viewHolder.tvSubTotal.setText(Double.toString(item.getSubTotal())); viewHolder.tvShopName.setText(item.getProduct().getShop().getName()); UrlImageViewHelper.setUrlDrawable(viewHolder.ivProduct, item.getProduct().getImage()); viewHolder.edQuantity.addTextChangedListener(new CartItemQuantityChangeListener(cartItems,item)); } return v; } @Override public int getCount() { return cartItems.size(); } @Override public CartItem getItem(int position) { return cartItems.get(position); } public void onClick(View arg0) { // TODO Auto-generated method stub } } </code></pre> <p><strong>My TextChanged listener class</strong></p> <pre><code>public class CartItemQuantityChangeListener implements TextWatcher { private ArrayList&lt;CartItem&gt; cartItems; private CartItem item; public CartItemQuantityChangeListener(ArrayList&lt;CartItem&gt; cartItems, CartItem item) { this.cartItems = cartItems; this.item = item; } public void afterTextChanged(Editable s) { try { int quantity = Integer.parseInt(s.toString()); Log.d(Constants.LOG_TAG, "quantity changed" + quantity); int index = this.cartItems.indexOf(item); Log.d(Constants.LOG_TAG, "INDEX" + index); // this.cartItems.get(index).setQuantity(quantity); /* * for(CartItem i : this.cartItems){ * Log.d(Constants.LOG_TAG,item.getProduct().getName() + " : " + * i.getQuantity()); } */ } catch (NumberFormatException ex) { } } public void beforeTextChanged(CharSequence s, int start, int count, int after) { // TODO Auto-generated method stub } public void onTextChanged(CharSequence s, int start, int before, int count) { } } </code></pre>
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