Android ListView with Checkbox: automatically unchecks

Question

I've got a ListView with a custom BaseAdapter. The list items contain CheckBoxes that need to represent a property from a database.

I use CheckBox.setOnCheckedChangeListener with a new OnCheckedChangeListener to detect changes, so I can change the database based on the current state of the CheckBox. Pretty straightforward stuff so far.

However, when scrolling further down the list, previously checked CheckBoxes get unchecked. I suspect this happens as soon as the views are recycled (I'm using the convertView/ViewHolder technique).

How can I stop this? What's going wrong?

Thanks in advance.

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Edit: To make things a bit clearer, the problem is that recycling views somehow calls OnCheckedChangeListener#onCheckedChanged(buttonView, isChecked) with isChecked == false.

Answer 1

Apparently the problem was that, by getting the checkbox using convertView.findViewById(), the onCheckedChangeListeners were still intact if the view was recycled. Calling checkbox.setOnCheckedChangeListener(null) did the trick.

Answer 2

Use a boolean array to store the checked state of each list item, record the changes inside setOnCheckedChangeListener(), then call setChecked() after setOnCheckedChangeListener().