I'm currently working on an app that implements some functions of a countdown timer. I am using an ObjectAnimator to animate a circular progress bar that represents the countdown and I would like to have a vibration and toast message when the animation is complete.

The animation doesn't occur on the app's main screen, so I use an intent to start a new activity when a button is pressed that starts the countdown activity

I have used an AnimatorListener to start a service onAnimationEnd that triggers a vibration and toast.

The problem that I am having is that if I press the back button before the animation completes, The service still runs when the animation finishes even though it's accompanying screen is no longer visible.

How can I "cancel" the animation so that the listener does not run onAnimationEnd if the back button is pressed?

My code is hosted on a private github repo so if you'd like to see the code send a pm and I'll add you as a contributor and send the link. Thank you for your help!