模拟Animator对象的GenerateViewID？

Question

我有一个在运行时创建的自定义ObjectAnimator对象。有没有类似于View的generateViewID（）方法，它让我获取它的ID，所以我可以将它附加到FragmentTransaction？换句话说，我想做这样的事情：

// assuming I already have ObjectAnimator objects animator1 and animator2
// also already have a FragmentTransaction object named transaction.

int id1 = animator1.generateID();
int id2 = animator2.generateID();
transaction.setCustomAnimations(id1, id2);