下面列出了android.view.ViewPropertyAnimator#rotationBy ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
public com.nineoldandroids.view.ViewPropertyAnimator rotationBy(float f)
{
ViewPropertyAnimator viewpropertyanimator = (ViewPropertyAnimator)b.get();
if (viewpropertyanimator != null)
{
viewpropertyanimator.rotationBy(f);
}
return this;
}
@Override
public void setupAnimation(View item, int position, int scrollDirection, ViewPropertyAnimator animator) {
animator.rotationBy(-INITIAL_ROTATION_ANGLE * scrollDirection);
}