Set the interpolator for android animations in Java

Question

This seems very simple: I'm trying to set the interpolator to be used for an animation in my App. I need to set this in the Java code, not the XML (It will change according to various things).

From the android website, I've found setInterpolator()

However, I'm not sure how to use this.

I've tried just feeding in the interpolar name (ie. BounceIterpolator), but this did nothing.

I tried R.anim.BounceIterpolator, but Intellisense said anim cannot be resolved or is not a field.

So how can I set the interpolator from the Java?

https://stackoverflow.com/a/67636215/479728 – Rasoul Miri May 21 '21 at 11:44 — Rasoul Miri, May 21 '21 at 11:44

score 87 · Accepted Answer · edited Mar 20 '13 at 22:07

87

setInterpolator(new BounceInterpolator());

edited Mar 20 '13 at 22:07

hsz

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answered Feb 16 '12 at 13:53

Reuben Scratton

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score 15 · Answer 2 · answered Oct 29 '13 at 16:18

15

anim.setInterpolator(context, android.R.anim.bounce_interpolator);

answered Oct 29 '13 at 16:18

Zsolt Safrany

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amalBit · Answer 3 · 2017-04-19T11:12:59.177

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Update:

Android now supports real spring and physics within animations. Its part of a backward compatible lib. Link

For custom interpolators:

Create a custom cubic bezier curve using this awesome site. And get the control points for the curve.
Interpolator customInterpolator = PathInterpolatorCompat.create(cpX1,cpX2,cpY1,cpY2)
Add this customInterpolator to any of your animation.

Added a gist. Some more here.

edited Apr 19 '17 at 11:12

answered Aug 24 '16 at 14:41

amalBit

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Wow. I searched the entire internet for this answer. Thank you! – Michael Jun 04 '17 at 18:28

score 0 · Answer 4 · answered Sep 28 '18 at 11:07

Thanks to amalBit I wrote an interpolator with a PathInterpolator for a ProgressBar in Kotlin.

val path = Path()
path.lineTo(0.1f, 0.2f)
path.lineTo(0.7f, 0.9f)
path.lineTo(1f, 1f)
val animation = ObjectAnimator.ofInt(progress_bar, "progress", 0, 100)
animation.duration = 2000
animation.interpolator = PathInterpolatorCompat.create(path)
animation.addListener(object : Animator.AnimatorListener {
    override fun onAnimationStart(animator: Animator) {}

    override fun onAnimationEnd(animator: Animator) {
        finish()
    }

    override fun onAnimationCancel(animator: Animator) {}

    override fun onAnimationRepeat(animator: Animator) {}
})
animation.start()

See more examples at https://www.programcreek.com/java-api-examples/index.php?api=android.view.animation.PathInterpolator.

Set the interpolator for android animations in Java

4 Answers4

Update: