How to implement Custom Collapsable Toolbar in android?
问题 Using this tutorial to implement a Flexible Space pattern (the one with the collapsing toolbar). I'm trying to achieve a similar effect as in the Lollipop Contacts activity , which at the beginning while entering the activity, views are only part of the image header: Then, the user can scroll down the layout below the image in order to reveal more of it, until it reaches the maximum: In my app, I can't manage to make it work. What happens is that when entering the activity, the image header