PropertyAnimation

  ImageView img = (ImageView) findViewById(R.id.img);  //渐变   ObjectAnimator objectAnimator=ObjectAnimator.ofFloat(img,"alpha",0f,1f);  objectAnimator.setRepeatCount(-1);  //一直重复  objectAnimator.setDuration(5000);   //时间  objectAnimator.start();            //启动  //旋转  （2大于1，顺时针旋转；2小于1，逆时针旋转。）  ObjectAnimator objectAnimator=ObjectAnimator.ofFloat(img,"rotation",0f,360f,360f,0f);  objectAnimator.setRepeatCount(-1);  objectAnimator.setDuration(5000);  objectAnimator.start();//平移 (translationX：2大于1，向右移动，反之向左移动；translationY：2大于1，向下移动，反之向上移动)  ObjectAnimator objectAnimator=ObjectAnimator.ofFloat(img,"translationX",0f,200f);  objectAnimator.setDuration(50000);  objectAnimator.setRepeatCount(-1);  objectAnimator.start();//缩放(后面的参数表示倍数，1f表示原来的大小) ObjectAnimator objectAnimator = ObjectAnimator.ofFloat(img, "scaleX", 1f, 2f);  objectAnimator.setDuration(50000);  objectAnimator.setRepeatCount(-1);  objectAnimator.start(); //混合  ObjectAnimator alpha=ObjectAnimator.ofFloat(img,"alpha",0f,1f);  ObjectAnimator rotation=ObjectAnimator.ofFloat(img,"rotation",0f,360f,360f,0f);  ObjectAnimator translationX=ObjectAnimator.ofFloat(img,"translationX",0f,200f);  ObjectAnimator scaleX = ObjectAnimator.ofFloat(img, "scaleX", 1f, 2f);  AnimatorSet set = new AnimatorSet();  //同时渐变和旋转，且平移，然后缩放  set.play(alpha).with(rotation).with(translationX).before(scaleX);  set.setDuration(3000);  set.start();  // 也可以设置延迟执行  // animator.setStartDelay(1000);//延迟1000ms后执行,需要在start()前调用