BTW, Just ordered your book on Amazon! On Sun, Jul 10, 2011 at 8:39 PM, Simon Platten <[email protected] > wrote:
> I'm trying to do this in such a way that I don't have to replicate > code...what ideally I would like is when I press either of the rotate > buttons, it invalidates the image causing it to be re-rendered and rotated, > so far the only way I've been able to get the rotation to work is to get the > imageview in my event listener, rotate the bitmap then put it back in the > imageview. > > I like to understand what is happening behind the scenes and I must admit > I'm not quite sure what methods are available to me, I'll take a look at the > links provided by Mark. > > Thank you. > > > On Sun, Jul 10, 2011 at 7:43 PM, Kostya Vasilyev <[email protected]>wrote: > >> No, there isn't any copying of data, and no editing as such in ListView. >> >> The adapter has a method to return a view for a particular item position, >> and that's it. It's the responsibility of this method to make sure that the >> data is presented in consistent way. >> >> If you are using ArrayAdapter, I'd recommend graduating to BaseAdapter. >> ArrayAdapter is like a children's bicycle with training wheels, great to >> start with, but easy to outgrow. >> >> And as Mark already pointed out, your data items (whether you use >> ArrayAdapter or not) should have enough information to recreate the visual >> state in getView: in your case, store the rotation value there. Update the >> rotation value in the data item whenever it's changed by the user, so it's >> there next time getView is called for this particular item. >> >> -- Kostya >> >> 10.07.2011 22:29, Simon Platten пишет: >> >> Obviously I'm missing something, it seems to me that the list view >>> doesn't work off the actual array but takes copies of the data when the >>> getView is called, when these are edited the differences are lost when the >>> item goes off view. I've tried modifying the getView to reference the array >>> directly, but with little success. >>> >> >> -- >> Kostya Vasilyev >> >> -- >> You received this message because you are subscribed to the Google >> Groups "Android Developers" group. >> To post to this group, send email to android-developers@** >> googlegroups.com <[email protected]> >> To unsubscribe from this group, send email to >> android-developers+**[email protected]<android-developers%[email protected]> >> For more options, visit this group at >> http://groups.google.com/**group/android-developers?hl=en<http://groups.google.com/group/android-developers?hl=en> >> > > > > -- > Regards, > Sy > > -- Regards, Sy -- 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
