Question

I’m overriding the getItemViewType() method in my project to indicate which view to use for items in my list, R.layout.listview_item_product_complete or R.layout.listview_item_product_inprocess

I know this function must return a value between 0 and 1 less than the number of possible views, in my case 0 or 1.

How do I know which layout is 0 and which is 1? I presume the first layout I created will be 0 and the latter one 1, but I want to return a variable so that this value is flexible…

I.e.

@Override
public int getItemViewType(int position) {
    // Define a way to determine which layout to use
    if(//test for inprocess){ 
        return INPROCESS_TYPE_INDEX;
    } else { 
        return COMPLETE_TYPE_INDEX;
    }
}

What/where can I reference to define the values for COMPLETE_TYPE_INDEX and INPROCESS_TYPE_INDEX ?

Answer 1

I need to know how to define COMPLETE_TYPE_INDEX as 1 or 0. Seems like such a trivial thing!

Honestly, it doesn’t matter whether COMPLETE_TYPE_INDEX is 0 and INPROCESS_TYPE_INDEX is 1, or vica versa. But you define them as class variables, in this case they can be static and final as well:

public class MyAdapter ... {
    private static final int COMPLETE_TYPE_INDEX = 0;
    private static final int INPROCESS_TYPE_INDEX = 1;
    private static final int NUMBER_OF_LAYOUTS = 2;

    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder = null;
        if (convertView == null) {
            if(getItemViewType(position) == COMPLETE_TYPE_INDEX)
                convertView = mInflater.inflate(R.layout.listview_item_product_complete, null);
            else // must be INPROCESS_TYPE_INDEX
                convertView = mInflater.inflate(R.layout.listview_item_product_inprocess, null);

            // etc, etc...
            // Depending on what is different in your layouts, 
            //   you may need update your ViewHolder and more of getView()
        }

        // Load data that changes on each row, might need to check index type here too
    }
    @Override
    public int getItemViewType(int position) {
        Order thisOrder = (Order) myOrders.getOrderList().get(position);

        if(thisOrder.getOrderStatus().equals("Complete")) return COMPLETE_TYPE_INDEX;
        else return INCOMPLETE_TYPE_INDEX;
    }
    @Override
    public int getViewTypeCount() {
        return NUMBER_OF_LAYOUTS;
    }
}