I should add that I uploaded a significantly updated "MultiTouch Visualizer 2" to the Market that uses this controller. It now supports 3+ touch points, and numbers all the touch points according to their pointer indices. It also shows the diagonal pinch diameter so that you can see how the pinch diameter doesn't get affected much when dual-touch operations snap together in X or Y on Synaptics devices like the G1 or the Nexus One.
I hear the EVO 4G can support some large number of touch points, can somebody please test this? (...I had to change the package name of MultiTouch Visualizer, because I managed to lose the keystore password, so the old version is not there anymore and version 2 is a separate download :-) ...) On Jun 9, 7:00 am, luke <[email protected]> wrote: > If anybody is creating multi-touch apps for Android, you may have > noticed the MotionEvent class is getting more and more complicated > over time. Additionally you may have discovered your code has > different quirky behavior on different devices (e.g. on Synaptics > devices, touch-down / touch-up can cause sudden jumps in pointer > position before the down/up event is received). > > I have written a class to simplify the process of writing multi-touch > applications for Android, and just updated it to Android 2.2 (and to > handle 3+ touch points on true 2D multi-touch sensors, as present on > the HTC Incredible and HTC EVO 4G), and moved the project to Google > Code hosting: > > http://code.google.com/p/android-multitouch-controller/ > > There are numerous advantages to using this controller over trying to > reinvent the wheel yourself, including simplicity and automatic device- > space / object-space coordinate conversion for pinch-zoom. This also > correctly centers the zoom of a pinch operation on the center of the > pinch rather than the center of the screen, and supports simultaneous > pinch-and-drag for more realistic pinching :-) -- 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
