BigSmallBig.java

 ObjectAnimator animator = ObjectAnimator.ofPropertyValuesHolder(
                    container,
                    PropertyValuesHolder.ofFloat("scaleX", 0.5f),
                    PropertyValuesHolder.ofFloat("scaleY", 0.5f)
            );
            animator.setDuration(300);
            animator.setRepeatCount(ObjectAnimator.RESTART);
            animator.setRepeatMode(ObjectAnimator.REVERSE);
            animator.setInterpolator(new FastOutSlowInInterpolator());
            animator.start();

PulseAnim.java

// loadImg is instance of ImageView
ObjectAnimator animator = ObjectAnimator.ofPropertyValuesHolder(
                loadImg,
                PropertyValuesHolder.ofFloat("scaleX", 0.8f),
                PropertyValuesHolder.ofFloat("scaleY", 0.8f)
        );
        animator.setDuration(300);
        animator.setRepeatCount(ObjectAnimator.INFINITE);
        animator.setRepeatMode(ObjectAnimator.REVERSE);
        animator.setInterpolator(new FastOutSlowInInterpolator());
        animator.start();