CODEWITHSUNDEEP
androidandroid-animation
mmagician
mmagician

Reputation: 2120

Android AnimatorSet repeat then cancel

What I need is an infinitely repeatable AnimatorSet (composed of 2 sequential animations) but also a way to stop these animations in a safe way (i.e. the final state is same as starting state). The stop would happen for example by tapping on the screen.

Major problem I had was when I tried stopping by calling either animatorSet.end() or cancel(), the animation was stopping either midway or finishing the first of the animations (hence not returning to original state).

I found a solution, which really is a mix of a number of different solutions found on SO.

IMPORTANT: The two sequential animations together create a graceful loop, such that animation1 takes a button slowly to the right, while animation2 returns it to the left more rapidly. This is why I need the stop to end gracefully, such that it finishes animation1 and animation2, whatever the state is when I want to stop it.

Upvotes: 1

Views: 824

Answers (1)

mmagician
mmagician

Reputation: 2120

To create a repeatable AnimatorSet:

animatorSet = new AnimatorSet();
animatorSet.play(animation1).after(animation2);

animatorSet.addListener(new AnimatorListenerAdapter() {
            boolean isCancelled;

            @Override
            public void onAnimationEnd(Animator animation) {
                if (!isCancelled) {
                    animatorSet.start();
                }
            }

            @Override
            public void onAnimationCancel(Animator animation) {
                this.isCancelled = true;
            }
        });

animatorSet.start();

Now the below method stopAnimation() you would call from your onClickListener or whatever you need to listen for to stop the animation (bear in mind animatorSet has to be accessible, make it a field for example).

public void stopAnimation(Context context){
        guideAnimationSet.removeAllListeners();

In the end I didn't need any cancel() or end(). This actually makes sense: once I remove the listener, the animatorSet will finish the current animations and then won't be able to start it again since the listener for repeating is gone.

Hope it helps someone!

Upvotes: 2

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