title: FAB animation with viewpager/tabslider
body: <p>I'm trying to find way to achieve such effect <a href="https://material-design.storage.googleapis.com/publish/material_v_4/material_ext_publish/0B6Okdz75tqQsVlhxNGJCNTEzNFU/components-buttons-fab-behavior_04_xhdpi_009.webm">https://material-design.storage.googleapis.com/publish/material_v_4/material_ext_publish/0B6Okdz75tqQsVlhxNGJCNTEzNFU/components-buttons-fab-behavior_04_xhdpi_009.webm</a></p>
  
  <p>I'm using android.support.v4.view.ViewPager</p>
  
  <p>I appreciate any hints and help </p>