Android Recyclerview 滚动事件监听

mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
    @Override
    public void onScrollStateChanged(@NonNull RecyclerView recyclerView, int newState) {
        super.onScrollStateChanged(recyclerView, newState);
    }
    @Override
    public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
        super.onScrolled(recyclerView, dx, dy);
        LinearLayoutManager layoutManager = (LinearLayoutManager) mRecyclerView.getLayoutManager();
        int position = layoutManager.findFirstVisibleItemPosition();
        if(position == 0){
            mTitle.setVisibility(View.GONE);
        }else {
            mTitle.setVisibility(View.VISIBLE);
        }
    }
});