HiHo!
On Mon, 2009-12-14 at 11:06 -0800, Romain Guy wrote:
> > v.setBackgroundResource(R.color.todo_item_highlighted);
>
> Here's your problem. Views are reused by ListView (so if you change
> the background of item #1, it might be reused as item #4 later),
You mean the reuse of convertView in the following code of
core/java/android/widget/ArrayAdapter.java?
private View createViewFromResource(int position,
View convertView,
ViewGroup parent,
int resource) {
View view;
TextView text;
if (convertView == null) {
view = mInflater.inflate(resource, parent, false);
} else {
view = convertView;
}
Why is this not documented in the documentation of onListItemClick()
giving a warning that v may not be as what the developer expects?
> this
> type of change must be done from the Adapter's getView() method.
You mean something like the following?
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
setListAdapter(new ArrayAdapter(this,
R.layout.todo_list_row,
new String[] {
"Phobos",
"Demos",
"Venus",
"Pluto",
"Mercury"
}) {
@Override
public View getView(int position,
View convertView,
ViewGroup parent) {
TextView t = (TextView) getLayoutInflater().inflate(
R.layout.todo_list_row,
parent,
false
);
t.setText(getItem(position).toString());
if (position == selectedPos) {
t.setBackgroundResource(
R.color.todo_item_highlighted);
}
return t;
}
});
}
@Override
protected void onListItemClick(ListView l,
View v, int position, long id) {
super.onListItemClick(l, v, position, id);
selectedPos = position;
}
Thank you.
> --
> Romain Guy
> Android framework engineer
> romain...@android.com
>
> Note: please don't send private questions to me, as I don't have time
> to provide private support. All such questions should be posted on
> public forums, where I and others can see and answer them
--
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