What do pivotX and pivotY mean in Android animations?

Question

These two terms occur in many places but what exactly do they mean in the context of Android animations?

This question is relevant to Android animations and should not be marked as *closed* / off-topic. — Adam Hurwitz, Feb 20 '18 at 21:12

score 63 · Accepted Answer · answered Oct 23 '14 at 07:53

63

The pivotX and pivotY is the central point of the animation.
So for example if you want to do Zoom In animation you can use this

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:fillAfter="true" >

    <scale
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:duration="1000"
        android:fromXScale="1"
        android:fromYScale="1"
        android:pivotX="50%"
        android:pivotY="50%"
        android:toXScale="3"
        android:toYScale="3" >
    </scale>

</set>

and the android:pivotX="50%" and android:pivotY="50%" will mean the zoom will be started from the center.

There is also a nice tutorial by android hive here

answered Oct 23 '14 at 07:53

Niko Adrianus Yuwono

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Thanks i was scratching my head for a long time and couldn't get any solutions from google – srujan maddula Oct 23 '14 at 07:58
@nayoso for zoom out ?? i am trying to do zoomout then after 1sec it should return back to its position how will i set return back to its position ? ? – Erum May 21 '15 at 13:04
3

So sad to hear you ask for zoom out after reading this post – Abdul Saleem Oct 09 '15 at 14:12
can i change the `android:pivotY="50%"` or `android:pivotX="50%"` value in java ? – medo Jul 22 '16 at 10:08
@medo I don't think you can modify it but you can create an animation with your desired pivot with ScaleAnimation constructor. – Niko Adrianus Yuwono Jul 25 '16 at 02:10
@NikoYuwono i found this `new ScaleAnimation(...);` – medo Jul 25 '16 at 08:26

What do pivotX and pivotY mean in Android animations?

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