On Aug 23, 10:05 am, Dianne Hackborn <[email protected]> wrote: > You need to participate in the view hierarchy as a layout manager, do get > the onSizeChanged() calls and such.
Since it's come up, it's actually been a thorn in my side to have to "be" a layout manager to know something simple such as the size of a view when it's changed size. It comes up again and again for some things I do. It would be a huge save of time and effort if I could just register a listener on a View to know when its onSizeChanged method has been called. For example, if I want to place an overlay on some arbitrary view as a callout or popup, I need to know its size and position the moment those things are known. I can't do it during any of the activity lifecycle methods because layout is a different stream of computation than the lifecycle. Same thing goes if I need to compute coordinates for an animation that happens at activity startup rather than on UI events. I've seen people hack up ugly polling looping to find out when layout completes! And it seems like huge waste of time just to implement a custom View or LayoutManager just to make this work. I hope that I'm just going about this the wrong way and that there is a more elegant solution. In the absence of that, having a hook into a view's onSizeChanged would be a huge win, IMO. Doug -- 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
