get scroll Y of RecyclerView or Webview

问题

I have created a activity Webview content placed in Recyclerview. I want to get the scroll Y position when I scroll webview. I tried Webview.getScrollY(), Webview.getY(), RecyclerView.getScrollY(), RecyclerView.getY(),... but it do not work fine. I can't get current scroll Y. Is there any suggest for get scroll Y of Webview or RecyclerView ?

回答1:

Use a RecyclerView.OnScrollListener for the RecyclerView and a View.OnScrollChangeListener for the webview.

You'll have to keep track of the total scroll yourself, like this:

private int mTotalScrolled = 0;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    ...

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

                mTotalScrolled += dy;

            }
        });

    ...

}

private int getScrollForRecycler(){
    return mTotalScrolled;
}

回答2:

computeVerticalScrollOffset()is more convenient at this situation as @Pkmmte mentioned.

mTotalScrolled  = recyclerView.computeVerticalScrollOffset();

来源：https://stackoverflow.com/questions/32459696/get-scroll-y-of-recyclerview-or-webview