ArcDroid, I would do the following:
Mock up the screen in a graphics creation/editing application. Slice out the parts that you're going to use for your app. Create a custom view. I use surfaceview if it's going to be primary. Load all of your assets and draw them to the screen. Tweak to get it to work right. Now write your touch handling code. Mostly you'll want to look for touch downs (**note on that for multitouch below) and trigger a sound on a touchdown point intersecting a key. For multitouch, when the second touch point comes down you won't get a down event but instead will have a move event with 2 touch points in it instead just one. There is a flaw in the implementation of the API though that no event is sent when the second touch point is lifted. You'll only find out when the first touch point has moved, as the event will have a pointer count of 1 instead of 2 like it did previously. That may not have much of an impact on your app but knowing to look for the pointer count going from 1 to 2 is key for you. A quick and dirty way to implement MT of any number of touches (Remember - some new phones support up to 5 touchpoints) is to keep an array of the keys and their states (up or down). If touch down or movement is occuring in any of those keys where the state is up, set the state to down and trigger the sound. If no touch is intersecting a key's bounds, set the state to up. This also makes for nice rendering since all you have to do is draw an alternate image for the current down keys. Good luck and have fun with your app On Sep 6, 10:12 pm, ArcDroid <jacobrjohn...@gmail.com> wrote: > Hello, > I would like to add multi-touch to my piano app and would like > feedback on the best way to do it. I hate the idea that multi-touch > is only for one view and not multiple views (ie buttons). > Thanks, > Jake -- 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
