Creating a new Paint object is mentioned as something to avoid here: http://android-developers.blogspot.com/2009/02/track-memory-allocations.html
I suppose it really depends on the frequency of the onDraw calls. I can tell you that it made a noticeable difference for us. We have a custom view that you can fling, and when we stopped allocating Paint objects the scrolling became noticeably smoother -- it didn't have those annoying little hickups anymore. In general, I prefer having zero calls to new in painting code. This includes String concatenation, the most insidious form of object allocation in Java. =) On Apr 4, 10:54 am, Ikon <ayanafr...@gmail.com> wrote: > Does that really help? I mean, is GC that bad? > > On Apr 4, 4:03 am, Greg Krimer <gkri...@gmail.com> wrote: > > > That sounds fine to me. Just remember to respect the clip rectangle > > (canvas.getClipBounds()) and ideally not spend time computing Paints > > for areas outside the clip. > > > Also, don't create a new Paint object in onDraw(). Create the Paint > > object once, store it in your view and re-use it on every draw > > operation. > > > On Apr 3, 11:03 am, Bob <bshumsk...@yahoo.com> wrote: > > > > > If it's drawing logic, then it's fine :) > > > > There is a lot of logic in varying the Paints though. > > > > On Apr 3, 12:49 pm, Romain Guy <romain...@google.com> wrote: > > > > > If it's drawing logic, then it's fine :) > > > > > On Fri, Apr 3, 2009 at 10:48 AM, Bob <bshumsk...@yahoo.com> wrote: > > > > > >> onDraw() should normally not contain any logic code. > > > > > > All the logic I have is necessary to draw my canvas. It looks to me > > > > > like that is going on in onDraw in the APIdemos, for example in > > > > > Layers.java. Am I mistaken here? > > > > > > Should I be drawing into a bitmap or something when one of my inputs > > > > > changes and then using onDraw to read from that bitmap or something so > > > > > as not to repeatedly do the same thing? > > > > > > Thanks, > > > > > Bob > > > > > -- > > > > Romain Guy > > > > Android framework engineer > > > > romain...@android.com > > > > > 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 Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
