How can I determine that CollapsingToolbar is collapsed?

Question

I need to know when CollapsingToolbar from material design library is collapsed.

Answer 1

As Marko said, this can be achieved using your own implementation of a OnOffsetChangedListener.

AppBarLayout appBarLayout = (AppBarLayout) view.findViewById(R.id.app_bar_layout); appBarLayout.addOnOffsetChangedListener(new AppBarLayout.OnOffsetChangedListener() {         @Override         public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) {             if (Math.abs(verticalOffset) == appBarLayout.getTotalScrollRange()) {                 // Collapsed             } else if (verticalOffset == 0) {                 // Expanded             } else {                 // Somewhere in between             }         }     }););