Someone in one of the past threads on this issue mentioned that overriding dispatchTouchEvent on Activity performs better than onTouchEvent on a View. It might be worth testing that if you guys are writing benchmarks anyway.
On Jan 27, 5:56 pm, Ralf Schneider <[email protected]> wrote: > Robert, > > yes, there is really nothing more! > > I have already tested with a Thread.sleep(18). This does not change the > behaviour. > Actually it makes other things worse. Events don't get handled in time: > If you don't touch the screen for a while it's get dimmed. If I put in the > Thread.sleep(...) and touch a (dimmed) screen it can take up to 3 and more > seconds until it gets bright again. Without the sleep() it is reacting > instantly. > > So I have abonomed Thread.sleep(...) and event.recycle(). I think we have to > live with this behaviour. > > But it would be good if another one can confirm this. Especially if it is a > problem with the Nexus One or Android 2.1. > > Can someone post its Java "Framerate meassurement code" and post it? Mine is > in a "Game-Framework" (which I can not share) written in C++. > > With this I can prepare a simple testcase. But as I told the test is really > simple: Take the code > from:http://android-developers.blogspot.com/2009/04/introducing-glsurfacev... > add the log output of the frame rate. > > Regards, > Ralf > > 2010/1/27 Robert Green <[email protected]> > > > So Ralf, > > > Is that really what you have for your touch handling? Nothing - and > > you get that slowdown? Can you test with a Thread.sleep(16) in there? > > > On Jan 27, 3:01 pm, Mario Zechner <[email protected]> wrote: > > > @Ralf > > > > that doesn't look suspicious at all. I guess we'll have to wait for > > > Robert to chim in. > > > > On Jan 27, 7:45 pm, Mario Zechner <[email protected]> wrote: > > > > > Nice, there goes another myth. I read about recycling the MotionEvent > > > > at a couple of places on the net. Thanks for clearing that up! > > > > > I wonder however why it is exposed as a public method. Additionally, > > > > the semantics of onTouch allow me to return a boolean indicating that > > > > i consumed the event (or not). So my reasoning was that in case i > > > > return true from onTouch and recycle the event, everything should work > > > > out fine. Maybe add to the documentation that it should never ever be > > > > called by an application? > > > > > Anyways, thanks again! > > > > (if you have the time, seeing as you are obviously responsible for > > > > this part of the framework, could you have a look at the other > > > > discussion on multi-touch over herehttp:// > > groups.google.com/group/android-developers/browse_thread/threa... > > > > :) > > > > > On Jan 27, 7:17 pm, Dianne Hackborn <[email protected]> wrote: > > > > > > On Tue, Jan 26, 2010 at 4:20 PM, Mario Zechner < > > [email protected]>wrote: > > > > > > > That being said, there shouldn't be any problems with touch events > > on > > > > > > devices running android >= 2.0 as they fixed the event flood > > problem > > > > > > in that version. I couldn't see any problem in my projects that > > make > > > > > > heavy use of the touch screen on my droid. There seems to be a > > small > > > > > > memory leak in the onTouch method if you don't call event.recycle > > > > > > before exiting the onTouch method. > > > > > > Oh my ghod... are you saying you are calling recycle() on the > > MotionEvent > > > > > that is -given- to you in onMotionEvent()? Please please please do > > not do > > > > > that, you do not own the event, and you are going to cause nasty > > problems if > > > > > you recycle it from the caller that does own it. > > > > > > -- > > > > > Dianne Hackborn > > > > > Android framework engineer > > > > > [email protected] > > > > > > Note: please don't send private questions to me, as I don't have time > > to > > > > > provide private support, and so won't reply to such e-mails. 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 [email protected] > > To unsubscribe from this group, send email to > > [email protected]<android-developers%[email protected]> > > For more options, visit this group at > >http://groups.google.com/group/android-developers?hl=en > > -- 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
