How to know whether a RecyclerView / LinearLayoutManager is scrolled to top or bottom?

Question

Currently I am using the follow code to check whether SwipeRefreshLayout should be enabled.

private void laySwipeToggle() {
    if (mRecyclerView.getChildCou         


        

Answer 1

Just keep a reference to your layoutManager and set onScrollListener on your recycler view like this

mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {

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

        visibleItemCount = mRecyclerView.getChildCount();
        totalItemCount = mLayoutManager.getItemCount();
        firstVisibleItemIndex = mLayoutManager.findFirstVisibleItemPosition();

        //synchronizew loading state when item count changes
        if (loading) {
            if (totalItemCount > previousTotal) {
                loading = false;
                previousTotal = totalItemCount;
            }
        }
        if (!loading)
            if ((totalItemCount - visibleItemCount) <= firstVisibleItemIndex) {
                // Loading NOT in progress and end of list has been reached
                // also triggered if not enough items to fill the screen
                // if you start loading
                loading = true;
            } else if (firstVisibleItemIndex == 0){
                // top of list reached
                // if you start loading
                loading = true;
            }
        }
    }
});