android - FloatingActionButton setVisibility() not working -

i can't hide floatingactionbutton. here code:

xml:

<coordinatorlayout>      <appbarlayout android:id="@+id/appbar">          <collapsingtoolbarlayout>              <imageview/>              <android.support.v7.widget.toolbar />          </collapsingtoolbarlayout>      </appbarlayout>      <nestedscrollview />      <android.support.design.widget.floatingactionbutton         android:id="@+id/fab"         app:layout_anchor="@id/appbar"         app:layout_anchorgravity="bottom|right|end"/>  </coordinatorlayout> 

and i'm calling:

fab.clearanimation(); fab.setvisibility(view.gone); 

i'm trying hide fab, seems setvisibility + clearanimation not work if fab in coordinatorlayout.

even if call fab.clearanimation, animation still triggered. can me?

if issue animation, try invalidating fab behavior. visibility, should null anchor have set in layout:

coordinatorlayout.layoutparams p = (coordinatorlayout.layoutparams) fab.getlayoutparams(); p.setbehavior(null); //should disable default animations p.setanchorid(view.no_id); //should let set visibility fab.setlayoutparams(p); fab.setvisibility(view.gone); // view.invisible might worth trying   //to bring things normal state coordinatorlayout.layoutparams p = (coordinatorlayout.layoutparams) fab.getlayoutparams(); p.setbehavior(new floatingactionbutton.behavior()); p.setanchorid(r.id.appbar); fab.setlayoutparams(p);