Hi,
I usually use images for checked and unchecked status checkboxes rather than
using actual checkbox widget.
because i always failed to use actual checkbox widget in listview facing
listitem click issue. I know this may not be useful suggestion to you.
On Sat, Feb 26, 2011 at 7:30 AM, Wall-E <bashee...@gmail.com> wrote:
> I have a ListActivity and an ArrayAdapter that contains a list of an
> Object for example ArrayAdapter<MyObject>. Now in my ArrayAdapter I
> inflate a layout that includes a checkbox. I'm having the issue now
> that when I click on the checkboxes it's fine until it scrolls past
> the window. Now I know that the adapter recycles views so let me
> explain how I have my adapter set up and if anyone could kindly see
> what I'm doing wrong:
>
> I have a ViewHolder class such as the following:
>
> public class ViewHolder
> {
> View base;
> CheckBox checkbox;
> TextView tagTexView;
> TextView tagIDTextView;
>
> public ViewHolder(View base)
> {
> this.base = base;
> }
>
> CheckBox getTagCheckBox()
> {
> if(checkbox == null)
> {
> checkbox = (CheckBox)
> base.findViewById(R.id.tagInfoCheckBox);
> }
> return checkbox;
> }
>
> TextView getTagMainIdentifierTextView()
> {
> if(tagTexView == null)
> {
> TwoLineListItem twoListItem =
> (TwoLineListItem)
> base.findViewById(R.id.taginfo_layoutTwoLineListItem);
> tagTexView = (TextView)
> twoListItem.getText1();
> }
> return tagTexView;
> }
>
> TextView getTagIDTextView()
> {
> if(tagIDTextView == null)
> {
> TwoLineListItem twoListItem =
> (TwoLineListItem)
> base.findViewById(R.id.taginfo_layoutTwoLineListItem);
> tagIDTextView = (TextView)
> twoListItem.getText2();
> }
> return tagIDTextView;
> }
> }
>
> Now in my getView method, I inflate convertView and create the
> viewHolder if convertView is null or set the view holder if it's not
> (holder = (ViewHolder) convertView.getTag()).
>
> After that, I set all the values of the views by accessing the views
> using the holder, for example:
>
> holder.getTagCheckBox().setChecked(tag.plot);
>
> where tag is MyObject that I get using getItem(position) inside my
> getView and tag.plot is the boolean value that will indicate if the
> checkbox should be checked or not.
>
> I also created a OnCheckedChangeListener that just sets to tag.plot to
> whatever the checked state is and then call notifyDataSetChanged();
>
> So the text that I update in my views works just fine but the checkbox
> seems to get screwed up and although I've read a few suggestions, none
> of them have worked.
>
> @Override
> public View getView(final int position, View convertView, ViewGroup
> parent)
> {
> mInflater = LayoutInflater.from(context);
>
> final MyObject tag = this.getItem(position);
>
> // A ViewHolder keeps references to children views to avoid
> // unneccessary calls to findViewById() on each row.
> ViewHolder holder;
>
> // When convertView is not null, we can reuse it directly,
> there is
> // no need to reinflate it. We only inflate a new View when
> the
> convertView
> // supplied by ListView is null.
> if (convertView == null)
> {
> convertView =
> mInflater.inflate(R.layout.taginfo_layout, null);
>
> // Creates a ViewHolder and store references to the
> two children
> // views we want to bind data to.
> holder = new ViewHolder(convertView);
>
> convertView.setTag(holder);
> }
> else
> {
> // Get the ViewHolder back to get fast access to the
> TextView
> // and the ImageView.
> holder = (ViewHolder) convertView.getTag();
> }
>
> // Set the checkbox value to the value of tag.plot
> holder.getTagCheckBox().setChecked(tag.plot);
> holder.getTagCheckBox().setOnCheckedChangeListener(new
> android.widget.CompoundButton.OnCheckedChangeListener()
> {
> @Override
> public void onCheckedChanged(CompoundButton
> buttonView,
> boolean isChecked)
> {
> tag.plot = isChecked;
> notifyDataSetChanged();
> }
>
> });
>
> // just for testing I print out the position of the
> view
> holder.getTagMainIdentifierTextView().setText("Position: " +
> position);
>
> holder.getTagIDTextView().setText("Tag ID: " + tagid);
>
> return convertView;
> }
>
> If anyone could find what my mistake is in terms of handling the
> checkbox, I would greatly appreciate it. Also let me know if I need
> to post more code.
>
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