Example how to hide and show floating action button while scrolling the list (code not optimized well)

//this example is for recyclerView but it can be used somewhere else
recyclerView.setOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                super.onScrollStateChanged(recyclerView, newState);
            }

            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);

                if (dy > 0) {
                    hideFab();
                } else if (dy < 0) { showFab(); } } }); //magic happens here private void hideFab() { if (isFabShowing) { isFabShowing = false; if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
                final Point point = new Point();
                getActivity().getWindow().getWindowManager().getDefaultDisplay().getSize(point);
                final float translation = fab.getY() - point.y;
                fab.animate().translationYBy(-translation).start();
            } else {
                Animation animation = AnimationUtils.makeOutAnimation(getActivity(), true);
                animation.setFillAfter(true);

                animation.setAnimationListener(new Animation.AnimationListener() {
                    @Override
                    public void onAnimationStart(Animation animation) {

                    }

                    @Override
                    public void onAnimationEnd(Animation animation) {
                        fab.setClickable(false);
                    }

                    @Override
                    public void onAnimationRepeat(Animation animation) {

                    }
                });

                fab.startAnimation(animation);
            }
        }
    }

    private void showFab() {
        if (!isFabShowing) {
            isFabShowing = true;
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
                fab.animate().translationY(0).start();
            } else {
                Animation animation = AnimationUtils.makeInAnimation(getActivity(), false);
                animation.setFillAfter(true);

                animation.setAnimationListener(new Animation.AnimationListener() {
                    @Override
                    public void onAnimationStart(Animation animation) {

                    }

                    @Override
                    public void onAnimationEnd(Animation animation) {
                        fab.setClickable(true);
                    }

                    @Override
                    public void onAnimationRepeat(Animation animation) {

                    }
                });

                fab.startAnimation(animation);
            }
        }
    }