Android Button Animation Sample

btn_on_click.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <scale
        android:fromXScale="1.0"
        android:toXScale="0.6"
        android:fromYScale="1.0"
        android:toYScale="0.6"
        android:pivotX="50%"
        android:pivotY="50%"
        android:duration="300"
        android:repeatCount="1"
        android:repeatMode="reverse"
        android:fillAfter="true" />
    <alpha
        android:duration="300"
        android:fromAlpha="1.0"
        android:toAlpha="0.1"
        android:repeatCount="1"
        android:repeatMode="reverse"
        android:fillAfter="true" />
    <rotate
        android:duration="60"
        android:fromDegrees="-20"
        android:toDegrees="20"
        android:pivotX="50%"
        android:pivotY="50%"
        android:repeatCount="6"
        android:repeatMode="reverse"
        android:fillAfter="true" />
</set>