Thanks Robert, Sure which I could simply use the multitouch with multiple views. Looks like I am going to have one heck of a time mapping all the locations of the keys. Jake
On Sep 6, 10:01 pm, Robert Green <[email protected]> wrote: > 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<[email protected]> 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 [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
