CODEWITHSUNDEEP
androidscrollandroid-recyclerviewshow-hide
phlosopher_mk
phlosopher_mk

Reputation: 340

View flicking while hiding/showing on scroll in recycler view

I have linear layout at the bottom and I want to hide that view on scroll up and show on scroll down. I was able to achieve that with scroll listener on recycler view . But there is one problem, when you are scrolling slow view is flickering (showing and hiding fast).

This is my code 

bottom = (LinearLayout) getActivity().findViewById(R.id.linerabottom);
    recycleList.addOnScrollListener(new RecyclerView.OnScrollListener() {
        @Override
        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
            super.onScrolled(recyclerView, dx, dy);
            if (dy > 0) {
                bottom.setVisibility(View.GONE);

            } else {
                bottom.setVisibility(View.VISIBLE);
            }

        }
    });

Here is a video of the issue https://goo.gl/photos/TwUJjmPUA4kJCsaR8 .

Can you help me to find out what is the issue ? Thank you.

Upvotes: 1

Views: 2125

Answers (1)

Nikola Despotoski
Nikola Despotoski

Reputation: 50588

This is normal, because your dy at some point of time fluctuates between dy >= 0 and dy < 0. If you want to achieve sort of quick return view, you should bound it to something like this: 

 recycleList.addOnScrollListener(new RecyclerView.OnScrollListener() {
        @Override
        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
            super.onScrolled(recyclerView, dx, dy);
            mTotalDy += dy;
            if (dy > 0 && mTotalDy >= bottom.getHeight()) {
                bottom.setVisibility(View.GONE);

            } else if(recyclerView.getScrollState() == RecyclerView.SCROLL_STATE_IDLE && bottom.getVisiblity() == View.GONE) {
                bottom.setVisibility(View.VISIBLE);
                mTotalDy = 0;
            }

        }
    });

Upvotes: 1

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