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POListView adapter with many checkboxes
 

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  1. POListView adapter with many checkboxes
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    <p>I'm having some minor problems with my listview. Every item has some information and a checkbox. This shows up fine, I can select and deselect checkboxes etc etc.</p> <p>However I discovered some strange behaviour. Lets say I click the first checkbox at the first row. If the ListView is small so you don't need to scroll down this works fine. But if the ListView is large so I need to scroll down to see all the items, some random item at the bottom also becomes clicked. Same behaviour the other way around, if I click a checkbox at the bottom of the listview and scroll up, some random checkbox is also clicked at top. If i click several checkboxes somewhere, some other place there are the same amount of clicked checkboxes. I figured this happens when GetView(...) is called, meaning when it updates. It then makes some new checkboxes clicked but I don't know why.</p> <p>Appreciate some help here! :)</p> <p>SSSCE of my adapter:</p> <pre><code>public class ListViewAdapterSSCCE : BaseAdapter { private Activity myActivity; private string[] someData; private int numberOfElements; private CheckBox[] boxes; public ListViewAdapterSSCCE(Activity activity) { this.myActivity = activity; for (int i = 0; i &lt; numberOfElements; i++) this.boxes[i] = new CheckBox(myActivity); } public void SetData(string[] someData) { this.someData = someData; this.numberOfElements = someData.Length; } public void CheckAllBoxes(bool isChecked) { for (int i = 0; i &lt; numberOfElements; i++) this.boxes[i].Checked = isChecked; } public override Java.Lang.Object GetItem(int position) { return null; } public override long GetItemId(int position) { return 10; } public override int Count { get { return numberOfElements; } } public override View GetView(int position, View convertView, ViewGroup parent) { if (convertView == null) { LayoutInflater inflater = (LayoutInflater)myActivity.GetSystemService(Context.LayoutInflaterService); convertView = inflater.Inflate(Resource.Layout.ChildrenList_item, null); } var itemBox = convertView.FindViewById&lt;CheckBox&gt;(Resource.Id.checkbox); this.boxes[position] = itemBox; var textView = convertView.FindViewById&lt;TextView&gt;(Resource.Id.item_data); textView.Text = this.someData[position]; return convertView; } } </code></pre>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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