Thanks for the quick reply!

So then would the best approach be to call invalidate, and change the
size of the View using setMeasuredDimension on every tick of a Timer
object?

On Jul 30, 11:39 am, Romain Guy <[email protected]> wrote:
> Subclassing Animation won't help you unfortunately. It would be best
> for you to implement the animation yourself.
>
>
>
> On Fri, Jul 30, 2010 at 11:18 AM, jsera <[email protected]> wrote:
> > Hi, I'd like to subclass Animation in order to get an animation that
> > changes the clipRect of the canvas passed to a particular custom view
> > instead of messing with the matrix of that canvas.
>
> > The reason for this, is that I want to animate a partially obscured
> > bitmap up to display it fully.
>
> > So, say I have a bitmap 100x100 px, and at the start of the animation,
> > I want to start out displaying the top 100x50px of it, so the clipRect
> > will be of the size 100x50.
>
> > I want to move the clipRect 50px up, and add 50 px to it's size, but
> > it looks like both the scale and translate animations just change the
> > matrix, so I wind up displaying the same 100x50px area, but stretched
> > to fit in in whatever space.
>
> > Anyway, what's the best way of accomplishing this?
>
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> --
> 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

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