Does anyone know if every phone will support multi-touch (I remember talk about the G1's hardware might not support multi-touch)?
On Oct 28, 5:08 am, niko20 <nikolatesl...@yahoo.com> wrote: > Dianne, > > Thanks for the great info. Yep looks like you just get the count of > pointers and walk through that. > > Now, if only there was a great trick to do multitouch on the > emulator ! (I should be getting an actual phone soon though) > > -niko > > On Oct 27, 11:45 am, Dianne Hackborn <hack...@android.com> 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-touchworks; 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 > > <flyingdutc...@gmail.com>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-touchis now supported: > > > > Android virtual keyboard > > > •An improved keyboard layout to makes it easier to hit the correct > > > characters and improve typing speed. > > > •The ***framework'smulti-touchsupport*** 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 howmulti-touchis supported in the API. > > > -- > > 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 -~----------~----~----~----~------~----~------~--~---
