Android Animated Background

Activity.java

final ImageView backgroundOne = (ImageView) findViewById(R.id.background_one);
final ImageView backgroundTwo = (ImageView) findViewById(R.id.background_two);
final ValueAnimator animator = ValueAnimator.ofFloat(0.0f, 1.0f);
        
animator.setRepeatCount(ValueAnimator.INFINITE);
animator.setInterpolator(new LinearInterpolator());
animator.setDuration(10000L);
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
    @Override
    public void onAnimationUpdate(ValueAnimator animation) {
        final float progress = (float) animation.getAnimatedValue();
        final float height = backgroundOne.getHeight();
        final float translationY = height * progress;
        backgroundOne.setTranslationY(translationY);
        backgroundTwo.setTranslationY(translationY - height);
    }
});
animator.start();

layout.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/background_one"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scaleType="centerCrop"
        android:src="@drawable/animate_background"/>

    <ImageView
        android:id="@+id/background_two"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scaleType="centerCrop"
        android:src="@drawable/animate_background"/>

</FrameLayout>