动画效果改变view的高度

private void startPropertyAnim() { ViewGroup.LayoutParams layoutParams = ll_big.getLayoutParams(); ValueAnimator anim = ValueAnimator.ofInt(layoutParams.height, 100); ll_big.setPivotX(0.0f); ll_big.setPivotY(0.0f); anim.setDuration(2000); anim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator valueAnimator) { int h = (int) valueAnimator.getAnimatedValue(); ViewGroup.LayoutParams layoutParams = ll_big.getLayoutParams(); layoutParams.height = h; ll_big.requestLayout(); } }); // 正式开始启动执行动画 anim.start(); }