如何将ObjectAnimator重置为其初始状态? [英] How to reset ObjectAnimator to it's initial status?

问题描述

我想用scaleX和scaleY振动视图，并使用此代码来执行此操作，但是问题是有时视图未正确重置，并且显示了应用了比例的情况...

I want to vibrate a view with scaleX and scaleY, and I am doing it with this code, but the problem is that sometimes the view is not correctly reset, and it shows with the scale applied...

我希望动画结束时，必须始终以其原始状态查看视图

I want that when the animation ends, the view must be seen with its original status always

这是代码:

                ObjectAnimator scaleX = ObjectAnimator.ofFloat(view, "scaleX", 1f, 0.9f);
                scaleX.setDuration(50);
                scaleX.setRepeatCount(5);
                scaleX.setRepeatMode(Animation.REVERSE);
                ObjectAnimator scaleY = ObjectAnimator.ofFloat(view, "scaleY", 1f, 0.9f);
                scaleY.setDuration(50);     
                scaleY.setRepeatCount(5);
                scaleY.setRepeatMode(Animation.REVERSE);
                set.play(scaleX).with(scaleY);
                set.start();

谢谢

推荐答案

对于ValueAnimator和ObjectAnimator可以这样尝试:

For ValueAnimator and ObjectAnimator can be like this a try:

animator.addListener(new AnimatorListenerAdapter() {
    @Override
    public void onAnimationEnd(Animator animation) {
        animation.removeListener(this);
        animation.setDuration(0);
        ((ValueAnimator) animation).reverse();
    }
});

更新 在Android 7上不起作用. 最好的方法是使用插值器.

UPDATE On Android 7 it doesn't work. Best way use the interpolator.

public class ReverseInterpolator implements Interpolator {

    private final Interpolator delegate;

    public ReverseInterpolator(Interpolator delegate){
        this.delegate = delegate;
    }

    public ReverseInterpolator(){
        this(new LinearInterpolator());
    }

    @Override
    public float getInterpolation(float input) {
        return 1 - delegate.getInterpolation(input);
    }
}

在您的代码中

animator.addListener(new AnimatorListenerAdapter() {
        @Override
        public void onAnimationEnd(Animator animation) {
            animation.removeListener(this);
            animation.setDuration(0);
            animation.setInterpolator(new ReverseInterpolator());
            animation.start();
        }
});

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