scrollview - How can I shrink the header on scroll down in android -


here link http://tympanus.net/blueprints/animatedheader/ header shrink while scroll down. how can same effect in android.

here sample

i have implemented thing in onscrollviewlistener , in onscrollchanged have write code achieve objective didn't success.

  • block_height fix heigt want stop shrinking ....like 150

  • currentheight intial height of header double of block_height .. 300

please see sample code

if (headerview.getlayoutparams().height <= (block_height * 2)  &&  headerview.getlayoutparams().height >= block_height){      currentheight -= 1;     headerview.getlayoutparams().height = currentheight;     headerview.invalidate();  }

have @ actionbar library may fulfill requirement

https://github.com/manuelpeinado/fadingactionbar

https://github.com/flavienlaurent/notboringactionbar


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