属性动画

final Button button = new Button(this);
ValueAnimator animator = ValueAnimator.ofInt(0,100);
animator.setDuration(5000);
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
     @Override
     public void onAnimationUpdate(ValueAnimator animation) {
          Integer value = (Integer)animation.getAnimatedValue();
          button.setText("" + value);
     }
});
animator.start();