首先,很遗憾的告诉你,你的属性动画方法弄错了,translationY这个属性View有,也就是所有的View及其子类都会有,你设置了属性名称,那么它会自动去调用对应的Set方法,比如,你现在这样写,那么它会自动调用View.setTranslationY(float translationY)方法,所以你无需再执行下面的代码:

objectAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
                        @Override
                        public void onAnimationUpdate(ValueAnimator valueAnimator) {
                            ViewGroup.LayoutParams params = scrollview.getLayoutParams();
                            params.height = (int) (params.height + (float)valueAnimator.getAnimatedValue());
                            scrollview.setLayoutParams(params);
                        }
                    });

其次还有个问题,LayoutParams.height 对应的有

        public static final int FILL_PARENT = -1;

        /**
         * Special value for the height or width requested by a View.
         * MATCH_PARENT means that the view wants to be as big as its parent,
         * minus the parent's padding, if any. Introduced in API Level 8.
         */
        public static final int MATCH_PARENT = -1;

        /**
         * Special value for the height or width requested by a View.
         * WRAP_CONTENT means that the view wants to be just large enough to fit
         * its own internal content, taking its own padding into account.
         */
        public static final int WRAP_CONTENT = -2;

你的代码执行起来后,设置的LayoutParams.height<-2,这很明显是不对的,一般都是大于0的.
删掉这段代码块后,如果你希望每次点击都网上平移100px,那么你可以这样写:

ll_wrap.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                float curTranslationY = scrollview.getTranslationY();
                Log.e("test","curTranslationY: "+curTranslationY);
                ObjectAnimator objectAnimator = ObjectAnimator.ofFloat(scrollview, "translationY", curTranslationY,curTranslationY-100f);
                objectAnimator.setDuration(500);
                objectAnimator.start();


            }
        });