Viewpageer behavior wrong when set state is STATE_HIDDEN

[ThuyKhanh]

I want to hide bottom sheet when activity create, so I set state as STATE_HIDDEN in onCreate() function
CoordinatorLayout coordinatorLayout = (CoordinatorLayout) findViewById(R.id.coordinatorlayout);
View bottomSheet = coordinatorLayout.findViewById(R.id.bottom_sheet);
behavior = BottomSheetBehaviorGoogleMapsLike.from(bottomSheet);
behavior.setState(BottomSheetBehaviorGoogleMapsLike.STATE_HIDDEN);
But I got the this issue. Check out image : https://goo.gl/M8bKpk
When I set state as STATE_COLLAPSED onCreate() funtion, it works fine.

[lordmegamax]

https://goo.gl/M8bKpk

Error 403

[krawa]

I confirm. When behavior initialized as STATE_HIDDEN in onCreate() something wrong.
When I set the state as STATE_COLLAPSED, when the button click, the FAB does not show
I logged ScrollAwareFABBehavior.onDependentViewChanged() and see
onDependentViewChanged child.getY()=24905.0 DyFix=0 offset=112.0
The value child.getY() is not correct and is constantly increasing

[leeyc09]

When view hide, actually view is gone.
So it loses its correct position.
Fix code.

ScrollAwareFABBehavior.onDependentViewChanged()

if ((child.getY() + DyFix) > collapsedY)
child.setVisibility(View.INVISIBLE);
else
if(child.isShown())
child.setVisibility(View.VISIBLE);
else
child.Show();

[vojtisek-michal]

I can confirm the above fix works.

Thanks @leeyc09
Would you mind creating a merge request to close this issue for others?