Android : Android AppCompat-v21 Toolbar Animation

I want to use new Android Toolbar pattern instead of ActionBar. I add a Toolbar as SupportActionBar from appCompat v21 and now, I want to hide/show it with animation while scrolling listView items. before, I use methods: actionBar.show() and actionBar.hide() and it animate automatically. but now, in Toolbar it hide and show without any animation. What should I do???