Custom auto hide floatingActionButton behavior is not working

Question

I\'m trying to hide a FloatingActionButton when a NestedScrollView scroll down, and revealed itself when NestedScrollView scroll up.

Here is my layout:

Answer 1

Take a look at what @woxingxiao is saying here

Pretty much onNestedScroll won't get fired if the visibility of the button is GONE. So, replace:

child.hide();

to:

child.hide(new FloatingActionButton.OnVisibilityChangedListener() {
    @Override
    public void onHidden(FloatingActionButton fab) {
        super.onHidden(fab);
        fab.setVisibility(View.INVISIBLE);
    }
});