This has to do with the fact that ListView recycles views. View Romain Guy's Google I/O talk about ListView when it comes out. It is really good and explains exactly why you're seeing this happen.
On Apr 30, 10:20 am, David <[email protected]> wrote: > Hey, > > I am facing a very mysterious Problem. I am using a ListView with > CheckBoxes that can be clicked to select people. > The row layout is the following: > > <?xml version="1.0" encoding="utf-8"?> > <LinearLayout > xmlns:android="http://schemas.android.com/apk/res/android"; > android:orientation="horizontal" > android:layout_width="fill_parent" > android:layout_height="wrap_content"> > <CheckBox > android:focusable="false" > android:onClick="onSelectPerson" > android:layout_width="wrap_content" > android:layout_height="wrap_content" > android:gravity="center_vertical" > android:layout_marginRight="5dip" > android:layout_marginLeft="5dip"/> > <TextView > android:id="@+id/person_name" > android:text="test" > android:layout_width="wrap_content" > android:layout_height="wrap_content" > android:gravity="center_vertical" > android:textSize="18dip" android:layout_marginLeft="5dip"/> > </LinearLayout> > > As long as the amount of rows doesen't exceed the screen size (-> no > scrolling) everything works just fine. > But as soon as I have more rows then the screen size (-> some rows are > hidden and have to be scrolled to). > I have a very mysterious phenomenon: > > If I check the top row and scroll down some of the previously hidden > rows are randomly checked too. If I scroll up again, again some of the > before hidden rows are randomly vhecked (the CheckBox I clicked in > first place may or may not still be checked). > Also the registered onSelectPerson callback is only called for the > CheckBoxes I really click. The other CheckBoxes just change their > state to "checked" without calling the callback method. > I have the same phenomenom on the Archos IT 5 and the Nexus One. > > This must have something to do with the ListView implementation but I > can't quite figure out what the problem is. > Can anyone help? > > Best Regards > > David > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group > athttp://groups.google.com/group/android-developers?hl=en -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
