Possibly worth adding -- while trying to analyze size is unwise with touchscreens as Dianne rightfully says, what some iPhone platform developers are doing is to determine pressure by analyzing the microphone input. This will work with Android, too (it's an old trick, pre-dating iPhone), especially Android phones. It's a bit tricky to code, and obviously this is more of an expressive thing than it is something you'd consider as fundamental to UI design, but I've tried some experiments that were pretty effective.
Peter On Dec 1, 4:34 pm, Dianne Hackborn <[email protected]> wrote: > On Tue, Dec 1, 2009 at 1:25 PM, patrick <[email protected]> wrote: > > ->for the pressure, when i use 2 fingers, the size 'detected' is > > sometimes suddenly enormous. > > That is exactly how the G1 and myTouch screen works -- when two fingers are > down, the size is essentially seeing them as a large touch area. > > So please keep in mind: even the x and y location during multi-touch can be > somewhat inaccurate in some various ways, that depend on the exact screen > hardware. The size and pressure are already not so accurate and vary in > their response with just one finger; for two or more fingers you will see > widely different behavior across different screens. > > As I have said many times before: size and pressure are really not too > useful for driving the UI. This goes even more so for multi-touch. You > just need to accept that. > > > 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? > > As I said, the framework has no finger limit. I don't know what screen htc > uses on whatever devices the ship, so I can't answer this question. Sorry. > > -- > 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
