属性动画

以前的我们执行动画使用的都是补间动画和逐帧动画，但这两种动画有一定的缺点，我们移动的只是当前控件的内容，而他本身并没有真正移动，所以当我们给当前控件设置监听的时间，响应的地方并不是我们移动后的位置，而是我们没有移动前的位置，所以有了属性动画，通过改变属性来使它真正的移动。
补间动画

<translate     xmlns:android="http://schemas.android.com/apk/res/android"    android:fromXDelta="0"    android:toXDelta="100"    android:fromYDelta="0"    android:toYDelta="50%p"    android:fillAfter="true"    android:duration="1000" ></translate>

上面就列举了一种，类似还有旋转透明度等变化。补间动画的播放

 Animation animation=AnimationUtils.loadAnimation(this, R.anim.translate);        iv_anim.startAnimation(animation);

逐帧动画

<animation-list xmlns:android="http://schemas.android.com/apk/res/android" onshot="false">    <item        android:drawable=""        duration="" />        <item        android:drawable=""        duration=""/>        <item        android:drawable=""        duration=""/></animation-list>

属性动画

v.setTranslationX(position);        v.setAlpha((float)Math.random());

上面这种改变的就是控件本身的属性，不过他们是在一瞬间完成的，并不能满足我们的需要。

ObjectAnimator oa = ObjectAnimator.ofFloat(v, "translationX", 0f,300f);        oa.setDuration(500);        oa.start();        ObjectAnimator oa = ObjectAnimator.ofFloat(v, "translationY", 0f,300f);        oa.setDuration(500);        oa.start();        ObjectAnimator oa = ObjectAnimator.ofFloat(v, "rotationX", 0f,360f);        oa.setDuration(500);        oa.start();

上面这种也属于属性动画，但并不能满足我们需求的同时执行动画。
方法1：

    ObjectAnimator animator = ObjectAnimator.ofFloat(v, "haha", 0f, 100f);//没有这个属性的时候，就是valueanimator        animator.setDuration(300);        //设置动画监听        animator.addUpdateListener(new AnimatorUpdateListener() {        @Override            public void onAnimationUpdate(ValueAnimator animation) {                //动画在执行的过程当中，不断地调用此方法                animation.getAnimatedFraction()//百分比                //得到duration时间内 values当中的某一个中间值。0f~100f                float value = (float) animation.getAnimatedValue();//                iv.setScaleX(0.5f+value/200);//0.5~1                iv.setScaleY(0.5f+value/200);//0.5~1            }        });        animator.start();        animator.addListener(new AnimatorListener() {            @Override            public void onAnimationStart(Animator animation) {                // TODO Auto-generated method stub            }            @Override            public void onAnimationRepeat(Animator animation) {                // TODO Auto-generated method stub            }            @Override            public void onAnimationEnd(Animator animation) {                // TODO Auto-generated method stub            }            @Override        public void onAnimationCancel(Animator animation) {                // TODO Auto-generated method stub            }        });

方法2：用ValueAnimator

ValueAnimator animator = ValueAnimator.ofFloat(0f,200f);        animator.setDuration(200);    animator.addUpdateListener(new AnimatorUpdateListener() {            @Override            public void onAnimationUpdate(ValueAnimator animation) {                //动画在执行的过程当中，不断地调用此方法            animation.getAnimatedFraction()//百分比            //得到duration时间内 values当中的某一个中间值。0f~100f            float value = (float) animation.getAnimatedValue();//                iv.setScaleX(0.5f+value/200);//0.5~1                iv.setScaleY(0.5f+value/200);//0.5~1        }        });        animator.start();

方法3

        //float... values:代表关键帧的值        PropertyValuesHolder holder1 = PropertyValuesHolder.ofFloat("alpha", 1f,0.7f,1f);        PropertyValuesHolder holder2 = PropertyValuesHolder.ofFloat("scaleX", 1f,0.7f,1f);    PropertyValuesHolder holder3 = PropertyValuesHolder.ofFloat("scaleY", 1f,0.7f,1f);        PropertyValuesHolder holder3 = PropertyValuesHolder.ofFloat("translationX", 0f,300f);    ObjectAnimator animator = ObjectAnimator.ofPropertyValuesHolder(iv, holder1,holder2,holder3);        animator.setDuration(1000);        animator.addUpdateListener(new AnimatorUpdateListener() {        @Override        public void onAnimationUpdate(ValueAnimator animation) {            // TODO Auto-generated method stub                float animatedValue = (float) animation.getAnimatedValue();            float animatedFraction = animation.getAnimatedFraction();            long playTime = animation.getCurrentPlayTime();                System.out.println("animatedValue:"+animatedValue+",  playTime:"+playTime);            }        });        animator.start();

方法4：—————–动画集合——————–

ObjectAnimator animator1 = ObjectAnimator.ofFloat(iv,"alpha", 1f,0.7f,1f);        ObjectAnimator animator2 = ObjectAnimator.ofFloat(iv,"scaleX", 1f,0.7f,1f);    ObjectAnimator animator3 = ObjectAnimator.ofFloat(iv,"scaleY", 1f,0.7f,1f);        AnimatorSet animatorSet = new AnimatorSet();        animatorSet.play(anim);//执行当个动画        animatorSet.playTogether(animator1,animator2,animator3);//同时执行        animatorSet.playSequentially(animator1,animator2,animator3);//依次执行动画    animatorSet.start();

——————-案例：实现抛物线效果————————–

//       * x:匀速//       * y:加速度   y=1/2*g*t*t//       * 使用估值器最好实现。//       */    ValueAnimator valueAnimator = new ValueAnimator();        valueAnimator.setDuration(4000);        valueAnimator.setFloatValues(values)    valueAnimator.setObjectValues(new PointF(0, 0));    //估值器---定义计算规则    valueAnimator.setEvaluator(new TypeEvaluator<PointF>() {            @Override            public PointF evaluate(float fraction, PointF startValue,                    PointF endValue) {            //拿到每一个时间点的坐标            //x=v*t (s秒)            PointF pointF = new PointF();            pointF.x = 100f*(fraction*4);//初始速度*(执行的百分比*4)                pointF.y = 0.5f*9.8f*(fraction*4)*(fraction*4);                pointF.y = 0.5f*150f*(fraction*4)*(fraction*4);            return pointF;        }        });        valueAnimator.addUpdateListener(new AnimatorUpdateListener() {        @Override        public void onAnimationUpdate(ValueAnimator animation) {            //得到此时间点的坐标                PointF pointF = (PointF) animation.getAnimatedValue();            iv.setX(pointF.x);            iv.setY(pointF.y);        }        });        valueAnimator.start();        ObjectAnimator oa = ObjectAnimator.ofFloat(v, "translationY", 0f,1100f);        oa.setDuration(500);        //设置加速器---        oa.setInterpolator(new AccelerateInterpolator(5));    oa.setInterpolator(new AccelerateDecelerateInterpolator());    oa.setInterpolator(new AnticipateInterpolator(8));    oa.setInterpolator(new OvershootInterpolator());        oa.setInterpolator(new CycleInterpolator(4));        oa.setInterpolator(new BounceInterpolator());        oa.start();