Re: [android-developers] Raw Touchscreen Data

Generally the touch screen firmware processes the raw data into low-level touch events.  It never leaves the screen hardware at all.

On Wed, May 9, 2012 at 10:51 AM, Lewis <leapinlew@gmail.com> wrote:

Hello all -

I've been tasked with determining if the capacitance touchscreen on a
android device is sensitive enough to provide even a partial
fingerprint. During my research I'm coming to the conclusion that no,
most devices does not have enough electrodes to determine the
variation between the ridge/valleys of a print but I'm also suspecting
the hardware doesn't do much more than provide X,Y coordinates to the
software.

My question is, when you develop for android is there a way to get
access to the touchscreen raw data?

An alternate, semi-related question, by chance does anyone here know
how the hardware on a capacitance fingerprint scanner works
differently than a capacitance touchscreen? It seems they utilize
similar technology but perhaps the density of electrodes on a
touchscreen is much less? I'm at a loss here.

Thanks for your time. If I have missed any threads about this, please
either give me some search terms so I can locate the thread or a link
to the thread will be appreciated.

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Dianne Hackborn
Android framework engineer
hackbod@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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