How set animation-list as xml attribute

You can declare it as

<set xmlns:android="http://schemas.android.com/apk/res/android" >

    <scale
        android:duration="700"
        android:fillAfter="false"
        android:fromXScale="0.0"
        android:fromYScale="0.0"
        android:interpolator="@android:anim/accelerate_decelerate_interpolator"
        android:pivotX="50%"
        android:pivotY="50%"
        android:toXScale="1.4"
        android:toYScale="1.4" />

    <scale
        android:duration="400"
        android:fillBefore="false"
        android:fromXScale="1.4"
        android:fromYScale="1.4"
        android:pivotX="50%"
        android:pivotY="50%"
        android:startOffset="700"
        android:toXScale="0.8"
        android:toYScale="0.8" />

</set>

Just a reference. You would have to change animation type and parameters. And as per my knowledge, you will have to start it using java.

Edit:

This is the link that can be helpful for animation list

I think you should first load the animation:

Animation anim = AnimationUtils.loadAnimation(this, R.anim.animation_name);

img.startAnimation(anim);