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. > > > > > -- > > > 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<android-developers%2bunsubscr...@googlegroups.com> > <android-developers%2bunsubscr...@googlegroups.com<android-developers%252bunsubscr...@googlegroups.com> > > > > > For more options, visit this group at > > >http://groups.google.com/group/android-developers?hl=en > > > > -- > > 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. > > -- > 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<android-developers%2bunsubscr...@googlegroups.com> > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > -- 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. -- 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
