Thank you very much! But my current usecase is not to detect motion, but hold. I have a PhotoView which display an icon. It needs to respond to click and hold event. If user click on it, it will scroll other widget content in one step. If user touch & hold on it, it will scroll the widget content one by one continually in about 800ms interval.
Currently I implement the behavior by setOnClickListener() method for the click event. For touch & hold, I override dispatchTouchEvent() method and check for the holding status by checking the move shall be less than 10 pixels and event.getEventTime() - event.getDownTime() > 800ms for MotionEvent.ACTION_MOVE event. It works fine in G1 but not work in emulator. Is there any better solution? Thanks! On Mar 30, 11:17 am, Romain Guy <[email protected]> wrote: > They work the same. > > > I have a class inherited from RelativeLayout and override public > > booleandispatchTouchEvent(MotionEvent event) method. After I touch & > > hold on the touch screen, in emulator I got MotionEvent.ACTION_DOWN > > event only. But in G1, I got MotionEvent.ACTION_DOWN first and then > > MotionEvent.ACTION_MOVE continuously, even if I try my best to hold > > still my finger tip. > > That's simply because you cannot hold your finger still. With a mouse > cursor you have a 1px precision, with a finger, it's a lot more. The > way to "work around" this is simply to use thresholds when you try to > detect motion. For instance in a ScrollView or ListView a scroll > happens only if the finger has moved by 16 pixels or more. You can use > the same values as the framework by looking at the ViewConfiguration > class. > > -- > Romain Guy > Android framework engineer > [email protected] > > Note: please don't send private questions to me, as I don't have time > to provide private support. 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 -~----------~----~----~----~------~----~------~--~---
