1.起初 我也只是在anim 文件夹里 写了一个drawable文件 可是没有停歇 只是不停的缩放

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/linear_interpolator"
    android:shareInterpolator="true"
 >
    <!-- 定义缩放变换 -->
    <scale android:fromXScale="0.8"
        android:toXScale="1"
        android:fromYScale="0.8"
        android:toYScale="1"
        android:pivotX="50%"
        android:pivotY="50%"
        android:repeatCount="-1"
        android:repeatMode="reverse"
        android:duration="500"/>
</set>

2.为了又一个延迟时间 ，九牛二虎之力 一个动画完成 开启另一个动画

 final ScaleAnimation animation0 = new ScaleAnimation(0.8f, 1f, 0.8f, 1f,
                Animation.RELATIVE_TO_SELF, 0.5f,
                Animation.RELATIVE_TO_SELF, 0.5f);
        animation0.setFillAfter(true);
        animation0.setDuration(250);

        final ScaleAnimation animation1 = new ScaleAnimation(1f,0.8f, 1f, 0.8f,
                Animation.RELATIVE_TO_SELF, 0.5f,
                Animation.RELATIVE_TO_SELF, 0.5f);
        animation1.setFillAfter(true);
        animation1.setDuration(200);


        animation0.setAnimationListener(new Animation.AnimationListener() {
            @Override
            public void onAnimationStart(Animation animation) {

            }

            @Override
            public void onAnimationEnd(Animation animation) {
                handler.postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        imgHeartbeat.startAnimation(animation1);
                    }
                },0);
            }

            @Override
            public void onAnimationRepeat(Animation animation) {
            }
        });
        animation1.setAnimationListener(new Animation.AnimationListener() {
            @Override
            public void onAnimationStart(Animation animation) {

            }

            @Override
            public void onAnimationEnd(Animation animation) {
                handler.postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        imgHeartbeat.startAnimation(animation0);
                    }
                },1000  );
            }

            @Override
            public void onAnimationRepeat(Animation animation) {

            }
        });

        imgHeartbeat.startAnimation(animation0);

废弃的代码 有待研究

  ObjectAnimator animator1 = ObjectAnimator.ofFloat(imgHeartbeat, "scaleX", 1f, 1.2f, 1);
        animator1.setDuration(500);
//        animator1.setRepeatCount(-1);


        ObjectAnimator animator2 = ObjectAnimator.ofFloat(imgHeartbeat, "scaleY", 1f, 1.2f, 1);
        animator2.setDuration(500);
//        animator2.setRepeatCount(-1);

        ObjectAnimator animator3 = ObjectAnimator.ofFloat(imgHeartbeat, "scaleX", 1, 0.1f, 1);
        animator3.setDuration(2000);
//        animator3.setRepeatCount(-1);

        ObjectAnimator animator4 = ObjectAnimator.ofFloat(imgHeartbeat, "scaleY", 1, 0.1f, 1);
        animator4.setDuration(2000);
//        animator4.setRepeatCount(-1);


        ObjectAnimator animator5 = ObjectAnimator.ofFloat(imgHeartbeat, "scaleX", 1f, 1f, 1);
        animator5.setDuration(3000);
//        animator5.setRepeatCount(-1);;

//        Scal
        AnimatorSet set=new AnimatorSet();

        set.play(animator1).with(animator2);
        set.play(animator3).with(animator4);
        set.play(animator3).after(animator1);
        set.play(animator5).after(animator3);
        set.setDuration(3000);

        set.setInterpolator(new LinearInterpolator());
//        set.start();