RecyclerView scrollToPosition not trigger scrollListener

Question

I\'m using RecyclerView, with ScrollListener:

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


        

Answer 1

It's a bit rudimentary, but you could try this Subclass of RecyclerView:

public class PatchedRecyclerView extends RecyclerView {

    private OnScrollListener listener;

    public PatchedRecyclerView(Context context) {
        super(context);
    }

    public PatchedRecyclerView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public PatchedRecyclerView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    public void setOnScrollListener(OnScrollListener listener) {
        super.setOnScrollListener(listener);
        this.listener = listener;
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {

        int preFirstChildPosition = getChildCount() != 0 ? getChildViewHolder(getChildAt(0)).getPosition() : -1;
        int preLastChildPosition = getChildCount() != 0 ? getChildViewHolder(getChildAt(getChildCount() - 1)).getPosition() : -1;
        super.onLayout(changed, l, t, r, b);
        int postFirstChildPosition = getChildCount() != 0 ? getChildViewHolder(getChildAt(0)).getPosition() : -1;
        int postLastChildPosition = getChildCount() != 0 ? getChildViewHolder(getChildAt(getChildCount() - 1)).getPosition() : -1;

        // TODO: Insert proper DX and DY values
        if (preFirstChildPosition != postFirstChildPosition || preLastChildPosition != postLastChildPosition)
            listener.onScrolled(this, 0, 0);
    }
}