extended floating action button for scrren swipe

Question

Hi I want to make an Extended floating action button when I swipe up my screen it will become shrink, and when I swipe down it will be extended. I tried a lot to search this answer but not found that's why I asked this question. thanks in advance

Answer 1

if you are making it visible or invisible using recyclerview scroll

then

    recyclerView.addOnScrollListener( new RecyclerView.OnScrollListener() {
        @Override
        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
            if (dy < 0)
                floatingActionbutton.hide();
            else if (dy > 0)
                floatingActionbutton.show();
        }

        @Override
        public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
            super.onScrollStateChanged( recyclerView, newState );
        }
    } );