RecyclerView scrollToPosition not trigger scrollListener

Question

I\'m using RecyclerView, with ScrollListener:

mRecyclerView.setOnScrollListener(new RecyclerView.OnScrollListener()
{
        @Override
        public void onScr         


        

Answer 1

int mFirst=0, mLast=0;

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);
        LinearLayoutManager llm = (LinearLayoutManager) recyclerview.getLayoutManager();
        mLast = llm.findLastCompletelyVisibleItemPosition();
        mFirst = llm.findFirstCompletelyVisibleItemPosition();
    }
});

imgRight.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        LinearLayoutManager llm = (LinearLayoutManager) recyclerview.getLayoutManager();
        llm.scrollToPositionWithOffset(mLast + 1, List.length());
    }
});

imgLeft.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        LinearLayoutManager llm = (LinearLayoutManager) recyclerview.getLayoutManager();
        llm.scrollToPositionWithOffset(mFirst - 1, List.length());
    }
});