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How do you overload a ListView

Hey,

I was trying to overload a ListView, to include an image downloaded from the net, and have some text next to it.

I've been trying to find a decent tutorial concerning this, but I've only found inconsistent bits and pieces, and I just ended up with a huge project filled with errors.

Could anyone help me out?

Dejan Pažin

This shouldnt be that difficult, since it is a very basic functionality. You just need to create custom adapter which extends ArrayAdapter. There you override the method getView and make it return a view that shows the picture and the text.

There are also planty of tutorials that will show you the complete process. Here is one:

http://www.softwarepassion.com/android-series-custom-listview-items-and-adapters/

errang

ASKER

I actually tried that site, but it doesn't explain anything about creating a custom adapter... it just has 2 java classes, 1 of which is very basic, and 2 other basic xml files.

Dejan Pažin

There is a complete explanation of how to make a custom adapter including code for it. The class is named OrderAdapter and it extends ArrayAdapter.

This is the copied class from the above link:

private class OrderAdapter extends ArrayAdapter<Order> {

        private ArrayList<Order> items;

        public OrderAdapter(Context context, int textViewResourceId, ArrayList<Order> items) {
                super(context, textViewResourceId, items);
                this.items = items;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
                View v = convertView;
                if (v == null) {
                    LayoutInflater vi = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                    v = vi.inflate(R.layout.row, null);
                }
                Order o = items.get(position);
                if (o != null) {
                        TextView tt = (TextView) v.findViewById(R.id.toptext);
                        TextView bt = (TextView) v.findViewById(R.id.bottomtext);
                        if (tt != null) {
                              tt.setText("Name: "+o.getOrderName());                            }
                        if(bt != null){
                              bt.setText("Status: "+ o.getOrderStatus());
                        }
                }
                return v;
        }
}

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errang

ASKER

Yea, I saw that the final code had all the pieces together, but for some reason it doesn't show me the overloaded ListView, I even copy pasted the code so, there shouldn't be any reason why it doesn't work..

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Dejan Pažin

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errang

ASKER

Oh... guess one thing I'm actually getting an error with is, this line:

setListAdapter(this.m_adapter);

The time when it actually ran, I scrolled over it, and Eclipse gave me a quick fix of creating the class... but there was nothing in it... shouldn't the ListAdapter do something when its set?

I don't see that being overloaded in this example.