private void animatePagerTransition(final boolean forward) {

    ValueAnimator animator = ValueAnimator.ofInt(0, viewPager.getWidth());

    animator.addListener(new Animator.AnimatorListener() {

        @Override

        public void onAnimationStart(Animator animation) {

        }

        @Override

        public void onAnimationEnd(Animator animation) {

            viewPager.endFakeDrag();

        }

        @Override

        public void onAnimationCancel(Animator animation) {

            viewPager.endFakeDrag();

        }

        @Override

        public void onAnimationRepeat(Animator animation) {

        }

    });

    animator.setInterpolator(new AccelerateInterpolator());

    animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {

        private int oldDragPosition = 0;

        @Override

        public void onAnimationUpdate(ValueAnimator animation) {

            int dragPosition = (Integer) animation.getAnimatedValue();

            int dragOffset = dragPosition - oldDragPosition;

            oldDragPosition = dragPosition;

            viewPager.fakeDragBy(dragOffset * (forward ? -1 : 1));

        }

    });

    animator.setDuration(AppConstants.PAGER_TRANSITION_DURATION_MS);

    viewPager.beginFakeDrag();

    animator.start();

}

UPDATE:

private int oldDragPosition = 0;

private void animatePagerTransition(final boolean forward, int pageCount) {

    // if previous animation have not finished we can get exception

    if (pagerAnimation != null) {

        pagerAnimation.cancel();

    }

    pagerAnimation = getPagerTransitionAnimation(forward, pageCount);

    if (viewPager.beginFakeDrag()) {    // checking that started drag correctly

        pagerAnimation.start();

    }

}

private Animator getPagerTransitionAnimation(final boolean forward, int pageCount) {

    ValueAnimator animator = ValueAnimator.ofInt(0, viewPager.getWidth() - 1);

    animator.addListener(new Animator.AnimatorListener() {

        @Override

        public void onAnimationStart(Animator animation) {

        }

        @Override

        public void onAnimationEnd(Animator animation) {

            viewPager.endFakeDrag();

        }

        @Override

        public void onAnimationCancel(Animator animation) {

            viewPager.endFakeDrag();

        }

        @Override

        public void onAnimationRepeat(Animator animation) {

            viewPager.endFakeDrag();

            oldDragPosition = 0;

            viewPager.beginFakeDrag();

        }

    });

    animator.setInterpolator(new AccelerateInterpolator());

    animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {

        @Override

        public void onAnimationUpdate(ValueAnimator animation) {

            int dragPosition = (Integer) animation.getAnimatedValue();

            int dragOffset = dragPosition - oldDragPosition;

            oldDragPosition = dragPosition;

            viewPager.fakeDragBy(dragOffset * (forward ? -1 : 1));

        }

    });

    animator.setDuration(AppConstants.PAGER_TRANSITION_DURATION_MS / pageCount); // remove divider if you want to make each transition have the same speed as single page transition

    animator.setRepeatCount(pageCount);

    return animator;

}