>pointToPosition() does exactly what it was meant to do: it converts a > point to a position, that is an index inside your adapter
I never said it didn't, once I understood its purpose. It just wasn't clearly documented that it returns an index to the adapter (which is a different object) and I don't think it is a clear choice to have that be the return value when the Gallery itself displays Views that are a subset of the adapter. If the documentation stated that was the case, or if the method name were a little more clear (perhaps pointToAdapterPosition) then the purpose of the method would be more obvious. Since the method is on the Gallery class I expected the return value to be pertinent to its particular instance, not to the instance of the adapter that is associated with it. > And it would be a terrible API on the Adapter itself. Point taken. On Sep 14, 2:13 pm, Romain Guy <[email protected]> wrote: > pointToPosition() does exactly what it was meant to do: it converts a > point to a position, that is an index inside your adapter. And it > would be a terrible API on the Adapter itself. > > To get the index of a view using pointToPosition() just subtract > getFirstVisiblePosition(). > > On Mon, Sep 14, 2009 at 1:01 PM, Justin Anderson > > > > <[email protected]> wrote: > > I think we are going to have to agree to disagree on this one. :) > > >> You are confusing views and items from the adapter. > > > I don't believe I am. Initially I did not realize that theGalleryonly has > > visible items as children. I understand that now. AFAICT, this was not > > documented anywhere... Hence the confusion. > > >> > If I have 20 items, and scroll to the 16th... then that means items 14 - > >> > 18 > >> > are visible. Which in turn means that according to thegallerythe item > >> > at > >> > position 0 is really the 14th and the item at position 5 is really the > >> > 18th? If that is the case, what can I do to get the view I want? > > >> No, it means the View at index 0 shows the data of the item at > >> position 14 in your adapter. > > > That is what I meant... I just didn't describe it as well as you did. > > > I believe that since thegallerydeals with displaying views and the > > pointToPosition() method deals with a point on the screen that it should > > return the index of the view at that point, rather than the index of the > > data array. I think it would be better to have that functionality on the > > adapter, rather than thegallery. > > > Thank you for your help. It has helped me understand how things work and I > > now know how to proceed to get the results I want. > > > Thanks, > > Justin > > > On Mon, Sep 14, 2009 at 1:25 PM, Romain Guy <[email protected]> wrote: > > >> You are confusing views and items from the adapter. > > >> > If I have 20 items, and scroll to the 16th... then that means items 14 - > >> > 18 > >> > are visible. Which in turn means that according to thegallerythe item > >> > at > >> > position 0 is really the 14th and the item at position 5 is really the > >> > 18th? If that is the case, what can I do to get the view I want? > > >> No, it means the View at index 0 shows the data of the item at > >> position 14 in your adapter. You can use getFirstVisiblePosition() to > >> convert back and forth between index and positions. > > >> -- > >> 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 > > -- > 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 --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Beginners" 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-beginners?hl=en -~----------~----~----~----~------~----~------~--~---
