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public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
int firstPosition = mManager.findFirstVisibleItemPosition();
int lastPosition = mManager.findLastVisibleItemPosition();
for (int i = firstPosition; i <= lastPosition; i++) {
View itemView = mManager.findViewByPosition(i);
itemView.animate().rotationY(度数).setDuration(0);//3d旋转
}
}