Hi, I've been experiencing this problem too, I don't rely on the order in which getView are called, but I do rely on the position. I noticed the *position* order (not call order) is reversed when I turn on the onscreen keyboard, and back again when I exit it.
I've added a tag to the views i'm creating marking the position in which they were created and I've printed this tag when convertView is not null. This is what I got for thee objects on the grid: count = 3 pos = 0, conView = null new: pos = 0, v = ....@43d01ab0 pos = 0, conView = ....@43d01ab0 pos = 0, v = ....@43d01ab0, v.tag = 0 pos = 1, conView = null new: pos = 1, v = ....@43d0bc70 pos = 2, conView = null new: pos = 2, v = ....@43d0e2b8 pos = 0, conView = null new: pos = 0, v = ....@43d0a2b8 pos = 0, conView = ....@43d0e2b8 <here i opened the onscreen keyboard, notice the pos and tag conflict> pos = 0, v = ....@43d0e2b8, v.tag = 2 pos = 1, conView = ....@43d0bc70 pos = 1, v = ....@43d0bc70, v.tag = 1 pos = 2, conView = ....@43d01ab0 pos = 2, v = ....@43d01ab0, v.tag = 0 pos = 0, conView = ....@43d0a2b8 <here i closed the onscreen keyboard, pos and tag conflict disappears> pos = 0, v = ....@43d0a2b8, v.tag = 0 pos = 0, conView = ....@43d01ab0 pos = 0, v = ....@43d01ab0, v.tag = 0 pos = 1, conView = ....@43d0bc70 pos = 1, v = ....@43d0bc70, v.tag = 1 pos = 2, conView = ....@43d0e2b8 pos = 2, v = ....@43d0e2b8, v.tag = 2 You can also notice I'm getting conView=null *twice* for position 0, this is also a problem i think. Any ideas? Mor. On Feb 26, 1:29 am, Bolha <[email protected]> wrote: > Hi, Streets Of Boston. > > I haven't thought about that, maybe because myGridViewshows very few > elements (like 10 or 20). > Although seeing the getView method passing or not an instantiated > view, I didn't realize that it was caching just the visible views. > > But how can we fix the sorting problem without doing a manual views > caching? I've seen that thepositionparameters is informed in order, > but I have no clue why the View instance doens't correspond to the > correctposition. > Oh, just to make it clear, I'm programming on SDK version 2.1 but > running on a 1.5 device. > > Thanks for the help > > Bolha > > On 24 fev, 17:40, Streets Of Boston <[email protected]> wrote: > > > > > Thanks! > > > But I think you will get serious performance issues on GridViews and > > ListViews with many items. In your fix, you cache the View for each > > possible item. This defeats the purpose of the 'convertView' parameter > > which has a non-null value when theGridViewre-uses a cached View. > > The amount of Views cached by theGridViewis no more than the amount > > of (partially) visible items on the screen > > (=ListView.getChildCount()), not the number of possible items > > (=BaseAdapter.getCount()), which can be much larger. > > > If you BaseApapter can have many items (more items than can be viewed > > simultaneously on the screen), you'll likely to hit some serious > > performance/memory/resource issues. > > > On Feb 24, 1:12 pm,Bolha<[email protected]> wrote: > > > > Hello, guys. > > > > I've had the same problem and solved it by saving the created views in > > > an array inside the adapter. Check the chunks of code below: > > > > public class ImageButtonCanalAdapter extendsBaseAdapter{ > > > private Context contexto; > > > private List<MyClass> list > > > private View savedViews[]; > > > > [...] > > > > public View getView(intposition, View convertView, ViewGroup > > > parent) > > > { > > > if (convertView == null) { > > > this.viewsBotoes[position] = new MyView > > > (this.contexto); > > > } > > > > return this.viewsBotoes[position]; > > > } > > > > } > > > > I hope it helps. > > > > Best regards. > > > >Bolha > > > > On 20 jan, 00:35, Streets Of Boston <[email protected]> wrote: > > > > > The animation is not necessary to make it happen. It just makes it > > > > really easy to actually see the issue :-) > > > > > On Jan 19, 6:06 pm, Mike M <[email protected]> wrote: > > > > > > yeah, > > > > > I get the same on Droid 2.0, Although I get it without having > > > > > animation applied to thegridview... > > > > > > I wish there was a uniform / sequential way that getView() was > > > > > called... > > > > > > On Jan 18, 5:29 pm, Streets Of Boston <[email protected]> wrote: > > > > > > > Hi Roman, > > > > > > > It does happen. :-) > > > > > > > I can reproduce it almost every time like this: > > > > > > - Just create an activity with a Grid View with quite a few images > > > > > > (or > > > > > > grid-items) and attach a grid-layout-animator to the grid-view. > > > > > > Configure the grid-view-animator in such a way that you see how the > > > > > > grid-view-items are laid-out. E.g. columns first, rows later. > > > > > > - Create an (empty) sub-activity that can be launched from the one > > > > > > having the grid-view. > > > > > > > - Start your grid-view's activiy in portrait orientation. > > > > > > - Start your sub-activity. > > > > > > - Rotate your phone into landscape orientation. > > > > > > - Press back to finish the sub-activity. > > > > > > The grid-view's activity is shown again and... > > > > > > > ... 9 out of 10 times, i see the grid-view being built up in reverse > > > > > > mode (i'm running on 2.1, Nexus One). > > > > > > > In my app, the 'getView()' method does not rely on the order in > > > > > > which > > > > > > the 'getView()' is called at all. > > > > > > > On Jan 18, 2:15 am, Romain Guy <[email protected]> wrote: > > > > > > > > I have never noticed such an issue. The only way I can think of > > > > > > > that > > > > > > > would cause this to happen would be if your adapter relies on the > > > > > > > order of the getView() calls. Note there is absolutely no > > > > > > > guarantee > > > > > > > about the order in which getView() will be called (theposition > > > > > > > argument will not necessarily be sequential, incrementing or > > > > > > > decrementing.) > > > > > > > > On Sun, Jan 17, 2010 at 8:57 PM, Mike M <[email protected]> > > > > > > > wrote: > > > > > > > > Streets of Boston, > > > > > > > > > Thanks for the reply. I do have an animation on myGridView, > > > > > > > > but I > > > > > > > > took it off and still notice the problem. > > > > > > > > > Any ideas? > > > > > > > > > Thanks > > > > > > > > > On Jan 17, 1:23 pm, Streets Of Boston <[email protected]> > > > > > > > > wrote: > > > > > > > >> I've seen this too in my app. > > > > > > > > >> If you add a layout-animation, that animates the grid-view > > > > > > > >> children > > > > > > > >> (i.e. the grid-items), you can clearly see this reverse order. > > > > > > > > >> On Jan 17, 4:03 am, Mike M <[email protected]> wrote: > > > > > > > > >> > Hey everyone, > > > > > > > > >> > I have agridviewof images that I load from the internet. > > > > > > > >> > When the > > > > > > > >> > phone rotates (or some other config change), > > > > > > > >> > onConfigurationChanged() > > > > > > > >> > is called. When that happens, the items in thegridvieware > > > > > > > >> > reversed > > > > > > > >> > (meaning, the 1st image is the last; they are in reverse > > > > > > > >> > order). > > > > > > > > >> > Does anyone know why this is or how to change it? I'm > > > > > > > >> > hoping someone > > > > > > > >> > has run into this before... > > > > > > > > >> > Sorry if I don't share any code. I don't think It'd help; > > > > > > > >> > it's more > > > > > > > >> > of a conceptual question. > > > > > > > > >> > Thanks, > > > > > > > > >> > Mike > > > > > > > > > -- > > > > > > > > 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 > > > > > > > > -- > > > > > > > Romain Guy > > > > > > > Android framework engineer > > > > > > > [email protected] > > > > > > > > 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- Hide > > > > > > > quoted text - > > > > > > > > - Show quoted text -- Hide quoted text - > > > > > > - Show quoted text -- Hide quoted text - > > > > - Show quoted text - -- 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
