support header's fling and inertia

[JeasonWong]

Thanks for your imitation, it's a good job! There is another difficult thing about header's fling and inertia when our team work for it. Can you challenge it ？ 😊

[wangweiqi23]

Thanks for your praise! Perhaps you can refer to NestedScrollView or describe your problem in detail.

[wangweiqi23]

Do you mean when touch events are in AppBarLayout?