Hide floating action button after recyclerview is scrolled in Viewpager fragment

Question

I have a viewpager in the containerActivity hosting two fragments, both having recyclerview, The floating action button is in the container activity, I want to hide fab on recyclerview scrolling.

This StackOverFlow post has the solution

But the problem is how to notify the fab in container activity that the recyclerview in the fragment is scrolled.

I am new to android, So any help would be appreciated. Thanks!

refer http://stackoverflow.com/questions/31617398/floatingactionbutton-hide-on-list-scroll — Keyur Thumar, Mar 21 '17 at 08:01
@Divyesh Can you show me a code snippet on how to create custom listener interface or if pointing to a good tutorial on how to create custom listener interface is also fine, as I said I am new to android programming. Thanks! — Haaris Ahamed, Mar 21 '17 at 08:07
http://techblogon.com/communication-between-activity-and-fragment-example/ — Divyesh Patel, Mar 21 '17 at 08:08
@Haaris Ahamed Upvote each answer and comment which is useful, so that it can help other. — Keyur Thumar, Mar 21 '17 at 08:38

score 3 · Accepted Answer · answered Oct 23 '18 at 09:50

try this method. it worked for me

mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
    super.onScrolled(recyclerView, dx, dy);
    if (dy > 0 && mFloatingActionButton.getVisibility() == View.VISIBLE) {
        mFloatingActionButton.hide();
    } else if (dy < 0 && mFloatingActionButton.getVisibility() != View.VISIBLE) {
        mFloatingActionButton.show();
    }
}});

Hide floating action button after recyclerview is scrolled in Viewpager fragment

1 Answers1