现在版本的onDependentViewChanged以及之后的几个重要方法都改动了

[amberkira]

    @Override
    public boolean onDependentViewChanged(CoordinatorLayout parent, FloatingActionButton child,
            View dependency) {
        if (dependency instanceof AppBarLayout) {
            // If we're depending on an AppBarLayout we will show/hide it automatically
            // if the FAB is anchored to the AppBarLayout
            updateFabVisibilityForAppBarLayout(parent, (AppBarLayout) dependency, child);
        } else if (isBottomSheet(dependency)) {
            updateFabVisibilityForBottomSheet(dependency, child);
        }
        return false;
    }