->for the pressure, when i use 2 fingers, the size 'detected' is
sometimes suddenly enormous.

about the finger limit, do you know if it will be the same for the htc
hero when it will receive the 2.1 firmware update?

btw, thanks for all these answers

On Dec 1, 7:49 pm, Dianne Hackborn <hack...@android.com> wrote:
> Pressure is extremely nebulous on touch screens.  Actually, they don't
> really detect it at all -- they detect size, and pressure is generally
> related to that.  I don't know what you mean by going wild, though I will
> admit I have never looked at the pressure data specifically for the second
> finger.  (The Droid screen is different than the G1 / myTouch screen in that
> it does report a separate pressure/size for the second finger, instead of
> there being only one value for both.)
>
> What does size look like?  Generally I would suggest relying on that much
> more than pressure.
>
> As for the number of fingers, the framework doesn't have a limit, but the
> screen reports up to 2.  I don't know if this will change in the future.
>
>
>
> On Tue, Dec 1, 2009 at 10:37 AM, patrick <patrick.boul...@gmail.com> wrote:
> > Coordinates for each pointer are OK: when I do a swipe with 2 fingers,
> > it draws 2 paralleles line.
> > But if I do a swipe too fast, it seems that pressure value goes wild!
>
> > you said that Droid driver only reports 2 points, is it intentional or
> > is it a bug/limitation that we have to deal with?
> > Will it be the same with update to SDK 2.0.1 or 2.1?
>
> > On Dec 1, 6:55 pm, Dianne Hackborn <hack...@android.com> wrote:
> > > What are the coordinates you see?  What event codes occur at this time?
> >  The
> > > Droid driver only reports a maximum of two points.  Running Pointer
> > Location
> > > on the Droid, I have only ever seen two points.
>
> > > On Tue, Dec 1, 2009 at 7:23 AM, patrick <patrick.boul...@gmail.com>
> > wrote:
> > > > I did a little test on a Motorola Droid:
> > > > I took the TouchPaint demo from the SDK and added some log in
> > > > onTouchEvent() method.
> > > > Theses logs returns event.getPointerCount() value.
>
> > > > What i get is pretty weird:
> > > > If a press with one fingern getPointerCount return mainly 1, but
> > > > sometimes it reports 2!
>
> > > > If i press with 2 fingers, getPointerCount  returns 2 but if i try
> > > > with 3 or more it still returns 2.
>
> > > > So, is this behavior linked to screens imperfections in the Droid? or
> > > > is it some kind of bug?
>
> > > > On Nov 18, 7:00 pm, Dianne Hackborn <hack...@android.com> wrote:
> > > > > On Tue, Nov 17, 2009 at 3:19 PM, 3pei <333...@gmail.com> wrote:
> > > > > > Can you explain this in a more detail?
>
> > > > > Different screens have different imperfections in reporting
> > multitouch;
> > > > by
> > > > > its nature you simply are not going to get perfect data, as there are
> > > > > intrinsic ambiguities in what is happening, and the different screen
> > > > > hardware and firmware has limitations in the quality of the data it
> > can
> > > > > detect and process.
>
> > > > > --
> > > > > Dianne Hackborn
> > > > > Android framework engineer
> > > > > hack...@android.com
>
> > > > > 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.
>
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> > > --
> > > Dianne Hackborn
> > > Android framework engineer
> > > hack...@android.com
>
> > > 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.
>
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> --
> Dianne Hackborn
> Android framework engineer
> hack...@android.com
>
> 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.

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