使用 AnimatorValue 的setValueUpdateListener（）时出现onUpdate（）更新突然不继续进行了？

valueAnimator.setValueUpdateListener(new AnimatorValue.ValueUpdateListener() {
  @Override
  public void onUpdate(AnimatorValue valueAnimator, float v) {
    mFraction = 1-v;
    Log.e("tnt", "animator play mFraction:" + mFraction);
    invalidate();
  }
});

valueAnimator.setStateChangedListener(new Animator.StateChangedListener() {
  @Override
  public void onStart(Animator animator) {
    Log.e("cccc", "onStart:");
  }

  @Override
  public void onStop(Animator animator) {
    Log.e("cccc", "onStop:");
  }


  @Override
  public void onEnd(Animator animator) {
    Log.e("cccc", "onEnd:");
  }
});