Android View Animation between activity transition

问题:

How can i keep an animation alive while the transitions between activities are occurring?

Suppose that i have two activities A and B. Activity B has a "slide in" transition over the activity A. I want to keep a button rotating in my activity A while the transition of B is occurring. My button stop the rotating animation when the Activity B starts the slide over the activity A. I guess it happens because the android switch the UI Thread process to the new activity that is coming and stop what the previous activity was doing, but in my case the user still can see the activity A being covered by the activity B.