Possible to addFrame but not to removeFrame on AnimationDrawable?

I'm creating an animation which should change randomly, so i needed to use AnimationDrawable (and yes, i couldn't manage that by using Animation.) So basicly, i have some imageviews and i am dynamically adding frame into, and setting to them. So far, everything works well. I can see that animation works, but the problem is after one animation has completed i need to remove every frame on that imageView and then add new ones to it. But unfortunately i couldn't find a way to remove frames... Is there a way to this? or it is just annoying lack?

Thanks in advance.

Manage it by setting animationDrawable to null, recreating it and then setting it back to imageview... But not sure if this is a effective way to do this. I still think there should be a method something like removeFrame... Anyway here is solution:

AnimationDrawable animationFrame = (AnimationDrawable) view.getDrawable();
animationFrame = null;
animationFrame = new AnimationDrawable(); 
// Do stuff...
view.setBackgroundDrawable(animationFrame);

Please let me know if there is more effective way to handle this. Because creating a new object over and over again in miliseconds can cause memory issue i guess.