The constructor ArrayAdapter<String>(Context, int, MainActivity.ListViewItem[]) is undefined

Question

I am new in Android Programming. I was doing a sample on ListView with different type of rows. I created a CustomAdapter which is extended from ArrayAdapter

public class CustomAdapter extends ArrayAdapter<String> {
    public static final int TYPE_ODD = 0;
    public static final int TYPE_EVEN = 1;
    public static final int TYPE_WHITE = 2;
    public static final int TYPE_BLACK = 3;

    private final Context context;
    private final int resource;
    private ListViewItem[] objects;

    public CustomAdapter(Context context, int resource, ListViewItem[] objects) {
        super(context, resource, objects);
        this.context = context;
        this.resource = resource;
        this.objects = objects;
    }

Eclipse shows super(context, resource, objects); line as error "The constructor ArrayAdapter(Context, int, MainActivity.ListViewItem[]) is undefined"

I can't figure out why this is happening. Please help on this.

CommonsWare · Accepted Answer · 2014-10-17 11:36:00Z

2

The data type in the angle brackets (<String>) needs to match the data type in the array you are supplying (ListViewItem[]). In your case, they do not.

Most likely, you should:

Make this an ArrayAdapter<ListViewItem>
Remove private ListViewItem[] objects, as it is unnecessary and will get you in trouble -- use getItem() to access the array from the superclass

Most likely, you do not need private final int resource either, as it is unlikely that you will be using it, though I cannot rule that out.

answered Oct 17, 2014 at 11:36

CommonsWare

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Comments

koutuk · Accepted Answer · 2014-10-17 11:46:03Z

public class CustomAdapter extends ArrayAdapter<ListViewItem> {
    public static final int TYPE_ODD = 0;
    public static final int TYPE_EVEN = 1;
    public static final int TYPE_WHITE = 2;
    public static final int TYPE_BLACK = 3;

    private final Context context;
    private final int resource;
    private ListViewItem[] objects;

    public CustomAdapter(Context context, int resource, ListViewItem[] objects) {
        super(context, resource, objects);
        this.context = context;
        this.resource = resource;
        this.objects = objects;
    }


----------
see the first line of answer just change this line

public class CustomAdapter extends ArrayAdapter<String>
to
public class CustomAdapter extends ArrayAdapter<ListViewItem>

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