Object methods in android extended array adapter

Question

I am having the following object in my activity class:

/**
 * Item object
 */
class OrderItem {
    /**
     * Private params
     */
    private String item_name;
    private Double item_price;
    private Integer quantity;

    public void OrderItem(String name, Double price, Integer qt){
        /**
         * Init the object properties
         */
        this.item_name = name;
        this.item_price = price;
        this.quantity = qt;
    }
    /**
     * Getters and setters
     */
    public String getName(){
        return this.item_name;
    }
    public void setName(String name){
        this.item_name = name;
    }

    public Double getPrice(){
        return this.item_price;
    }
    public void setPrice(Double price){
        this.item_price = price;
    }

    public Integer getQuantity(){
        return this.quantity;
    }
    public void setQuantity(Integer qt){
        this.quantity = qt;
    }
}

and I am using this object to update a ListView item. So I've set up a custom adapter for the list, to handle the current object, and add the data to the given view. Here is the code of my adapter:

class OrderObjectAdapter<OrderItem> extends ArrayAdapter<OrderItem>{
    private final Context context;
    private final List<OrderItem> object;

    public OrderObjectAdapter(Context context,List<OrderItem> object){
        super(context, R.layout.order_object_layout, object);
        this.context = context;
        this.object = object;
    }

    @Override
    public View getView(int position, View conertView, ViewGroup parent){
        LayoutInflater inflater = (LayoutInflater)
                context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View rowView = inflater.inflate(R.layout.order_object_layout, parent, false);
        /** Gather items from the view */
        TextView p_name = (TextView) rowView.findViewById(R.id.product_name);
        TextView p_value = (TextView) rowView.findViewById(R.id.product_value);
        TextView p_quantity = (TextView) rowView.findViewById(R.id.product_quantity);
        /** Asign data to the text views */
        OrderItem item = (OrderItem) object.get(position);
        p_name.setText("");
        return rowView;
    }
}

and this is how I use it:

    /**
     * Init the order_items adapter
     */
    order_details_list_view = (ListView)findViewById(R.id.order_details_list_view);
    order_items = new ArrayList<OrderItem>();
    order_items_adapter = new OrderObjectAdapter(
           this,order_items
    );
    /** Set the list adapter to the order items */
    order_details_list_view.setAdapter(order_items_adapter);

My problem is that in the method getView of my custom adapter, if I want to assign the object data to my view, the object property from that adapter, is always returning me out an object pointer(i think) instead of the object on wich I can call my getter methods to get the data. Here is a sample of what it is returned if I put a Log.e on it:

E/item﹕ com.avicolaarmeli.armeli.OrderItem@41561f98

Even if I typecast that into OrderItem or create a new var like: OrderItem item = object.get(position); I still cannot access the object's methods.

I've been trying to sort this out all the day and couldn't understand why. Can somebody please let me know what's wrong with my code?

Thanks

Blackbelt · Accepted Answer · 2014-03-20 18:52:28Z

1

What you are seeing is the this.toString(), that is the default implementation of Object.toString(), since you are not overriding it.

add

@Override
public String toString() {
   return this.item_name != null ? this.item_name : "name not set";
}

to your OrderItem add see what difference it makes

@Override
    public View getView(int position, View conertView, ViewGroup parent){
        if (convertView == null) {
        LayoutInflater inflater = (LayoutInflater)
                context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
          convertView = inflater.inflate(R.layout.order_object_layout, parent, false);
        }
        /** Gather items from the view */
        TextView p_name = (TextView) convertView.findViewById(R.id.product_name);
        TextView p_value = (TextView) convertView.findViewById(R.id.product_value);
        TextView p_quantity = (TextView) convertView.findViewById(R.id.product_quantity);
        /** Asign data to the text views */
        OrderItem item = (OrderItem) object.get(position);
        p_name.setText(item.getName());
        return convertView;
    }

Also it should be

class OrderObjectAdapter extends ArrayAdapter<OrderItem>{

not

class OrderObjectAdapter<OrderItem> extends ArrayAdapter<OrderItem>{

edited Mar 20, 2014 at 18:52

answered Mar 20, 2014 at 16:35

Blackbelt

158k31 gold badges308 silver badges310 bronze badges

Sign up to request clarification or add additional context in comments.

5 Comments

roshkattu Over a year ago

Well, ok, this returns my good key value. But I would like to get back the object to call it's methods. How can I achieve this?

roshkattu Over a year ago

I don't understand exactly what wasn't clear in my comment. Well, I have overrided the toString method, as you pointed out, and if I call object.toString() I get the item_name as in the object. so that's good. but for example, I have OrderItem item = (OrderItem) object.get(position); wich is actually a refference to the object. How can I call it's methods?

Blackbelt Over a year ago

you mean outside the Adpater subclass?

roshkattu Over a year ago

In the class OrderObjectAdapter<OrderItem>, getView method, when I go and iterate trough the objects in the list that are of type OrderItem, I am getting the current object like this: OrderItem item = (OrderItem) object.get(position); but tha value of item is a string like this: com.avicolaarmeli.armeli.OrderItem@41561f98 instead of an OrderItem object on wich I can call methods. Why is that?

roshkattu Over a year ago

let us continue this discussion in chat

Collectives™ on Stack Overflow

Object methods in android extended array adapter

1 Answer 1

5 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

5 Comments

Your Answer

Sign up or log in

Post as a guest

Related