Question

I create a dialog and populate it with a listview that uses a custom list adapter. It works fine, but I’ve noticed that when the list is long enough to scroll, doing so back and forth will cause some of my list items to randomly lose some of their data. I’ve noticed it is always the same list items too. For instance, each list item will have a title, image, and date on it. The dates seem to vanish on some when I scroll. They are always there when I start the dialog, and they always vanish once I scroll.

The weird thing is that my list row consists of a few TextViews in 2 rows and its only the bottom row TextViews that dissapear…Any ideas?

Code for my dialog

 itemSendPickerDialog = new Dialog(this);
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
   builder.setTitle("Select Item to Send");
    ListView lv = new ListView(this);
    Cursor c = mDbHelper.fetchItemsByDate(id);
    c.moveToFirst();

    int i = R.layout.send_item_menu_row;
    MyListAdapter ia = new MyListAdapter(this, mainListBackground, c, true);
    lv.setAdapter(ia);

    builder.setView(lv);
    itemSendPickerDialog = builder.create();
    itemSendPickerDialog.show();

And my custom list adapter class:

class MyListAdapter extends ResourceCursorAdapter {
    public MyListAdapter(Context context, int i, Cursor cursor, boolean...sending) {
        super(context, i, cursor);
    }

    @Override
    public void bindView(View view, Context context, Cursor cursor) {

        TextView title = (TextView) view.findViewById(R.id.item_name);

        title.setText(cursor.getString(cursor.getColumnIndex(TripsDbAdapter.KEY_ITEM_TITLE)));

        Display display = ((WindowManager) context.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
        int width = display.getWidth();
        width = width - 150;
        ViewGroup.LayoutParams params = title.getLayoutParams();
        params.width = width;
        title.setLayoutParams(params);

        String cat = cursor.getString(cursor.getColumnIndex(TripsDbAdapter.KEY_ITEM_CATEGORY));
        if (cat.equalsIgnoreCase("trip notes")) {
            LinearLayout ll = (LinearLayout) view.findViewById(R.id.item_datetime_holder);
            ll.setVisibility(View.INVISIBLE);
        }
        TextView date = (TextView) view.findViewById(R.id.item_date);
        date.setText(cursor.getString(cursor.getColumnIndex(TripsDbAdapter.KEY_DEP_DATE)));

        TextView time = (TextView) view.findViewById(R.id.item_time);
        time.setText(cursor.getString(cursor.getColumnIndex(TripsDbAdapter.KEY_DEP_TIME)));

        ImageView iv = (ImageView) view.findViewById(R.id.image_icon);
        if (iv != null) {
            int index = cursor.getColumnIndex(TripsDbAdapter.KEY_ITEM_TYPE);

            String type = cursor.getString(index);
            if (type != null) {

            } else {
                type = "notes";
            }

            iv.setImageResource(getTypeResource(type));
        }

    }
}

Answer 1

I’ve figured out that the code that is doing this is in my custom list adapter class

String cat = cursor.getString(cursor.getColumnIndex(TripsDbAdapter.KEY_ITEM_CATEGORY));
        if (cat.equalsIgnoreCase("trip notes")) {   
            LinearLayout ll = (LinearLayout) view.findViewById(R.id.item_datetime_holder);
            ll.setVisibility(View.INVISIBLE);
        }

I hide some of the layout items depending on what the category is, and for some reason when putting a list view in an AlertDialog builder it appears to mix up the items. I don’t know exactly how I am going to fix it, but for now if I just remove the invisibility functionality, my data won’t go away.