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 code is working perfect for me. You can use percentage scale How you like

@Override
public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) {
    double percentage = (double) Math.abs(verticalOffset) / collapsingToolbar.getHeight();
    if (percentage > 0.8) {
        collapsingToolbar.setTitle("Collapsed");
    } else {
        collapsingToolbar.setTitle("Expanded");
    }
}