What do pivotX and pivotY mean in Android animations?
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What do pivotX and pivotY mean in Android animations?
提问by srujan maddula
These two terms occur in many places but what exactly do they mean in the context of Android animations?
These two terms occur in many places but what exactly do they mean in the context of Android animations?
回答by Niko Adrianus Yuwono
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
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.
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
There is also a nice tutorial by android hive here
