So you're saying that if I get an event with a pointer count of say 2 (using event.getPointerCount()), and let's say that event.getHistorySize returns 5. This means there are absolutely 10 historical positions in total? There isn't a case where say, pointer 1 will have 5 historical positions, and say pointer 2 only has 2 historical positions?
Thanks, On Oct 16, 7:14 pm, Dianne Hackborn <[email protected]> wrote: > On Sat, Oct 16, 2010 at 1:08 AM, webmonkey <[email protected]> wrote: > > Is the historical data device dependent? So are there any devices that > > always set the amount to 0? > > Er. Not sure what you mean. It is just any data that has occurred since > the last motion event and the most recent positions in the current one. It > depends on how fast hardware generates data, how fast the apps consumes > data, etc. > > > Historical data is mostly used for smooth painting, see: > > >http://corner.squareup.com/2010/07/smooth-signatures.html > > > Works great on the Nexus One. But if other devices do not use this or > > if this gets deprecated that would be nice to know for the future. > > This is part of the API. It just lets you get all of the intermediate data > coming from the touch screen. I can't make guarantees about every possible > piece of hardware in the future, though of course I would generally expect > touch screens to generate at least 60fps of data when there is only one > finger down. > > -- > 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] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
