[android-developers] Re: SimpleCursorAdapter.bindView() and Row Views

Just to close this off (in case anyone cares), there was a bug in my
code. However, it was due to the unexpectedness of those multiple
calls to bindView() and the changing association of positions and row
views. What happened when bindView() was called, I checked the view's
tag for a holder object, and if there was one I left it alone. Since,
it seems, a row view can be assigned to different positions during the
filling of the adapter/ListView. This means I have to update the view
holder, or create a new one, with the most current position data in
every call to bindView(). I don't understand why it operates this way,
but now that I do, I got it working.

On Oct 23, 10:36 am, Nmix <nepean...@gmail.com> wrote:
> This has actually gotten worse. When I finish the app by pressing the
> back button, then re-launch the app, I am now also getting row views
> for position 0 from the previous run of the app. So now I have 3 row
> views floating around for position 0.
>
> Am I doing this all wrong, or what?
>
> The key part of this is that when a button is clicked I can easily
> access the correct row view that contains the button, but I have the
> problem when I then try to modify a different row view. In my
> particular case, the problem is only when that other row view is for
> position 0.
>
> On Oct 22, 7:56 pm, Nmix <nepean...@gmail.com> wrote:
>
> > I have a problem withbindView() that has me puzzled. I am using it to
> > customize each row, including setting icons, coloring the background
> > and setting up listeners for buttons. It mostly works as expected, but
> > not quite.
>
> > When I fill the ListView with SimpleCursorAdapter, I get multiple
> > calls tobindView() for position 0, but only 1 call for the other
> > rows. The problem is that when all is said and done, I have 2 rows
> > (LinearLayout) created for position 0. Here is a sample log extract:
>
> > 10-22 23:25:02.834: DEBUG/PAproto(1042): LBV: pos:0 icon:1
> > view:android.widget.LinearLayout@437e13c0
> > 10-22 23:25:02.834: DEBUG/PAproto(1042): LBV: pos:0 icon:1
> > view:android.widget.LinearLayout@437e13c0
> > 10-22 23:25:02.844: DEBUG/PAproto(1042): LBV: pos:0 icon:1
> > view:android.widget.LinearLayout@437e13c0
> > 10-22 23:25:02.853: DEBUG/PAproto(1042): LBV: pos:0 icon:1
> > view:android.widget.LinearLayout@437e13c0
> > 10-22 23:25:02.864: DEBUG/PAproto(1042): LBV: pos:0 icon:1
> > view:android.widget.LinearLayout@437e13c0
> > 10-22 23:25:02.934: DEBUG/PAproto(1042): LBV: pos:0 icon:1
> > view:android.widget.LinearLayout@437e13c0
> > 10-22 23:25:02.997: DEBUG/PAproto(1042): LBV: pos:1 icon:2
> > view:android.widget.LinearLayout@437e4810
> > 10-22 23:25:03.024: DEBUG/PAproto(1042): LBV: pos:2 icon:3
> > view:android.widget.LinearLayout@437e67a8
> > 10-22 23:25:03.054: DEBUG/PAproto(1042): LBV: pos:3 icon:4
> > view:android.widget.LinearLayout@437e8700
> > 10-22 23:25:03.093: DEBUG/PAproto(1042): LBV: pos:4 icon:5
> > view:android.widget.LinearLayout@437ea660
> > 10-22 23:25:03.234: DEBUG/PAproto(1042): LBV: pos:0 icon:1
> > view:android.widget.LinearLayout@437ecf40
> > 10-22 23:25:03.243: DEBUG/PAproto(1042): LBV: pos:0 icon:1
> > view:android.widget.LinearLayout@437ecf40
> > 10-22 23:25:03.243: DEBUG/PAproto(1042): LBV: pos:0 icon:1
> > view:android.widget.LinearLayout@437ecf40
> > 10-22 23:25:03.254: DEBUG/PAproto(1042): LBV: pos:0 icon:1
> > view:android.widget.LinearLayout@437ecf40
> > 10-22 23:25:03.264: DEBUG/PAproto(1042): LBV: pos:0 icon:1
> > view:android.widget.LinearLayout@437ecf40
>
> > I use a view holder class to hold the view, position and other data so
> > that when a button is clicked, I can retrieve the holder with
> > view.getParent.getTag(). This all works fine. The problem is that
> > there are two views for position 0, but it's the first one in the
> > above logcat that seems to be displayed. My code which acts on the
> > rows when a button is clicked (especially setting background color)
> > does not reliably hit the position 0 row that is actually displayed.
>
> > I can see what's happening but I am at a loss about what to do about
> > it. Why are two view created for position 0? Is it something that I
> > can control? How? If not, how should I deal with it so that the
> > results when I modify the views are predictable? Thanks!
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