Obsolete: With the Design Support Library announced during IO15 comes the CollapsingToolbarLayout which is much more powerful, elegant and easier to use. Use it!

CollapsingHeader

It's like an Android ToolBar reacting to a scroll listener, but not quite.

This is a sample showing how to make a list headerView looking like it is part of the ToolBar and fade out its content when the user starts scrolling. I wrote a blog post explaining each step of the process.

Result