Dianne: Hahaha, okay, thanks for saving me the trouble! Everyone: I'll do the community a huge favor and write a full-blown tutorial on how to write multi-touch apps... IF someone will just give me a Motorola Droid phone. ;) Seriously, if I had one, or any 2.0 phone that fully supports multi-touch, I'd be more than happy to test the hell out of the MotionEvents for the new multi-touch protocol and write a detailed how-to.
-- PJ On Nov 11, 10:11 pm, Dianne Hackborn <[email protected]> wrote: > I am pretty sure the emulator will not do anything intelligent with this. > :) I very much doubt its touch driver has even been changed to generate > events with the new multitouch protocol. > > > > > > On Wed, Nov 11, 2009 at 1:27 PM, PJ <[email protected]> wrote: > > I'm seriously considering installing a special mouse driver that > > allows two mice at once on the screen (they do exist), and trying to > > see if the emulator responds to simultaneous clicks as multi-touch. > > Someone please try this and let me know if it works. Or maybe I'll > > get around to it in a couple of weeks... > > > On Nov 10, 9:06 am, "[email protected]" > > <[email protected]> wrote: > > > On Oct 27, 6:45 pm, Dianne Hackborn <[email protected]> wrote: > > > > > It's basically just some new APIs on MotionEvent: > > > > >http://developer.android.com/reference/android/view/MotionEvent.html > > > > > <http://developer.android.com/reference/android/view/MotionEvent.html > > >Hmmm.... > > > > and I'm not sure why, but in the doc all of those new APIs are in > > gray, so > > > > they should be easy to see. :) > > > > > Or here is the API diff report: > > > > >http://developer.android.com/sdk/api_diff/5/changes.html > > > > > <http://developer.android.com/sdk/api_diff/5/changes.html>I see that > > I > > > > didn't get around to writing documentation in MotionEvent on the way > > > > multi-touch works; sorry about that. Basically there are new actions > > that > > > > tell you when additional fingers go down and up, and each MotionEvent > > you > > > > receive allows you to query for the number of pointers in the event as > > well > > > > as the x, y, size, and pressure of each of those points (and the > > historical > > > > data for all those points as well if you want to collect all data since > > the > > > > last motion event you received). > > > > > So it should be pretty straight-forward. The main thing to watch out > > for is > > > > the difference between the index in the current event for a pointer's > > data > > > > vs. the pointer ID for that pointer: > > > > >http://developer.android.com/reference/android/view/MotionEvent.html#. > > .. > > > > > < > >http://developer.android.com/reference/android/view/MotionEvent.html#.. > > .>The > > > > pointer ID allows you to keep track of the individual fingers across > > > > multiple motion events. For example, if the user touches finger 1, > > then > > > > finger 2, then releases 1, then touches 1 again, you would see: > > > > > Finger 1 down: MotionEvent ACTION_DOWN with one pointer, whose ID is 0. > > > > > Finger 2 down: MotionEvent ACTION_POINTER_2_DOWN with two pointers, > > whose > > > > IDs are 0 and 1. > > > > > Finger 1 up: MotionEvent ACTION_POINTER_1_UP with one pointer, whose ID > > is > > > > 1. > > > > > Finger 1 down: MotionEvent ACTION_POINTER_1_DOWN with two pointers, > > whose > > > > IDs are 0 and 1. > > > > > Finger 1 up: MotionEvent ACTION_POINTER_1_UP with one pointer, whose ID > > is > > > > 1. > > > > > Finger 2 up: MotionEvent ACTION_UP with one pointer, whose ID is 1. > > > > > (And inspite of what the update documentation says, the API allows for > > an > > > > arbitrary number of fingers, not just 3. I just happened to define > > > > convenience constants for the first 3 finger down/up actions, but given > > > > their weird naming as seen above and the finger ID mask is actually > > 255, it > > > > is perhaps best just to ignore those constants. :p) > > > > > On Tue, Oct 27, 2009 at 9:29 AM, Streets Of Boston > > > > <[email protected]>wrote: > > > > > > Kind-a burried inside the blog-post on developer.android.com(http:// > > > > > developer.android.com/sdk/android-2.0-highlights.html), i saw that > > > > > multi-touch is now supported: > > > > > > Android virtual keyboard > > > > > •An improved keyboard layout to makes it easier to hit the correct > > > > > characters and improve typing speed. > > > > > •The ***framework's multi-touch support*** ensures that key presses > > > > > aren't missed while typing rapidly with two fingers. > > > > > •A smarter dictionary learns from word usage and automatically > > > > > includes contact names as suggestions. > > > > > << > > > > > > I'm really curious how multi-touch is supported in the API. > > > > > -- > > > > 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. > > > > Hello, > > > Could you give me a more detailed example. I'm still not sure what is > > > the difference between the pointer's ID and the pointer's index. > > > Thanks!- Hide quoted text - > > > > - Show quoted text - > > > -- > > 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%2Bunsubs > > [email protected]> > > For more options, visit this group at > >http://groups.google.com/group/android-developers?hl=en > > -- > 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
