Android CollapsingToolbarLayout collapse Listener

Question

I am using CollapsingToolBarLayout alongside with AppBarLayout and CoordinatorLayout, and they are working Fine altogether. I set my <

Answer 1

This solution works perfectly for me to detect AppBarLayout collapsed or expanded.

appBarLayout.addOnOffsetChangedListener(new AppBarLayout.OnOffsetChangedListener() {
        @Override
        public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) {

            if (Math.abs(verticalOffset)-appBarLayout.getTotalScrollRange() == 0)
            {
                //  Collapsed


            }
            else
            {
                //Expanded


            }
        }
    });

Used addOnOffsetChangedListener on the AppBarLayout.