Un atributo (margin, padding) animado en el tiempo para android

animar un atributo

ValueAnimator varl = ValueAnimator.ofInt(150);
                    varl.setDuration(400);
                    varl.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {

                        @Override
                        public void onAnimationUpdate(ValueAnimator animation) {


                            float d = mRecyclerView.getContext().getResources().getDisplayMetrics().density;


                            ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) mRecyclerView.getLayoutParams();
                            params.bottomMargin = (int) (((Integer) animation.getAnimatedValue() - 150) * d);

                            mRecyclerView.setLayoutParams(params);
                        }
                    });
                    varl.start();