呼吸灯效果动画

最近做项目，产品设计稿上说要做一个一闪一闪的效果，那简单啊，开个定时器显示不显示，一分钟搞定，但是到演示时，又说我要的不是这个效果（可能是我想的简单了）难道这不是一闪一闪么，亮瞎眼了，然后他就从ipad上找了个效果给我看，尼玛，这是一闪一闪么，这是呼吸灯效果。就上网搜了下，根据自己使用情况写了这个工具类。

主要使用了ObjectAnimator 动画类通过对默认view大小的改变实现呼吸灯效果，代码很简单，只要传入一个view就可以了。

public class AnimationUtils {    private final int BREATH_INTERVAL_TIME = 2000; //设置呼吸灯时间间隔    boolean isStopAnimation = false;    ObjectAnimator anim1;    ObjectAnimator anim2;    ObjectAnimator anim3;    ObjectAnimator anim4;    AnimatorSet animSet;    private boolean isUp = true;    public AnimationUtils() {        isStopAnimation = false;    }    /**     * 停止动画     */    public void stopAnimation() {        isStopAnimation = true;        if (animSet != null) {            animSet.cancel();            animSet = null;        }    }    /**     * 开始动画     *     * @param view     */    public void startAnimation(final View view) {        if (animSet == null) {            isStopAnimation = false;            startPlay(view, false);        }    }    private void setAnimOut(final View view) {        anim1 = ObjectAnimator.ofFloat(view, "scaleX",                0.9f, 1.2f);        anim2 = ObjectAnimator.ofFloat(view, "scaleY",                0.9f, 1.2f);    }    private void setAnimIn(final View view) {        anim3 = ObjectAnimator.ofFloat(view, "scaleX",                1.2f, 0.9f);        anim4 = ObjectAnimator.ofFloat(view, "scaleY",                1.2f, 0.9f);    }    private void startPlay(final View view, boolean isPoll) {        if (isStopAnimation) {            return;        }        animSet = new AnimatorSet();        setAnimOut(view);        setAnimIn(view);        animSet.setDuration(BREATH_INTERVAL_TIME);        animSet.setInterpolator(new LinearInterpolator());        if (isUp) {            animSet.playTogether(anim1, anim2);            isUp = false;        } else {            animSet.playTogether(anim3, anim4);            isUp = true;        }        animSet.start();        animSet.addListener(new Animator.AnimatorListener() {            @Override            public void onAnimationStart(Animator animator) {            }            @Override            public void onAnimationEnd(Animator animator) {                startAnimation(view, true);            }            @Override            public void onAnimationCancel(Animator animator) {            }            @Override            public void onAnimationRepeat(Animator animator) {            }        });    }    private void startAnimation(final View view, boolean isPoll) {        startPlay(view, isPoll);    }}