Hi,
On Sun, Jul 26, 2009 at 9:13 AM, az9702 <[email protected]> wrote: > > Hi, > > I would like to implement a simple animation using View > > The animation involves drawing a rectangle (w =20px, h =10px) moving > from left to right at a 10px increment. > > I have two questions: > > (1) As the rect moves along, the previous drawing needs to be erased > so the rect appears moving along. > > My implementation erases by painting the previous rect with > background color. This works but doubles the drawing. > > Is there a more efficient way of erasing previous rect ? > > (2) A time delay is also required between two drawings to show > successive > movement. Without the delay, only the final rect will appear > drawn. > > My view class implements Runnable & has a Handler. > The run method updates the Rect location & invalidates. > I have a draw method that puts in the delay, like so: > > public void draw() { > for(int i =0; i<20; i++) { > handler.postDelayed(this, i*1000); //1 sec per drawing > } > } > > (1) & (2) cause the rect to go from left to right in 10px increment on > 1-sec interval. > > As the animation is simple, I would like to use View (not SurfaceView > or Animation) and it's OK to do all the work in UI thread. > > Is there a more efficient way than the one described above to > implement this simple animation ? > > Suggestions & comments are appreciated. > > Thanks. > > > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Beginners" 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-beginners?hl=en -~----------~----~----~----~------~----~------~--~---
