Android setting pivot point for scale animation

android animation pivot
TalMihr picture TalMihr · Jun 10, 2013 · Viewed 33.4k times · Source

I am trying to scale views to a certain size but can't quite understand how pivoting works.

Say I want to scale the view upwards only. What value should the "pivotY" hold? In XML, it is a percentage. How is it when applying pivot point programmatically?

Example:

ObjectAnimator scaleY = ObjectAnimator.ofFloat(view, "scaleY", scaleSize);
ObjectAnimator pivotY = ObjectAnimator.ofFloat(view, "pivotY", pivotPoint);

AnimatorSet set = new AnimatorSet();
set.PlayTogether(scaleY, pivotY);

Answer

TalMihr picture TalMihr · Jun 10, 2013

Quite simple actually.

If you want to scale upwards one clear option is:

 view.setPivotY(100);

and downwards:

 view.setPivotY(0);

then animate.

Related questions

Show and hide a View with a slide up/down animation

I have a LinearLayout that I want to show or hide with an Animation that pushes the layout upwards or downwards whenever I change its visibility. I've seen a few samples out there but none of them suit my needs. …

Read More
Android Left to Right slide animation

I have three activities whose launch modes are single instance. Using onfling(), I swing them left and right. The problem is when I swipe right to left the slide transition is okay but when I swipe left to right, I …

Read More
Android: Expand/collapse animation

Let's say I have a vertical linearLayout with : [v1] [v2] By default v1 has visibily = GONE. I would like to show v1 with an expand animation and push down v2 at the same time. I tried something like this: Animation …

Read More