private void togle() {
        ll_des_container.measure(0, 0);
        int start = ll_des_container.getMeasuredHeight(); //動畫的開始高度
        int end = 0; //動畫的結束高度
        if (mIsOpen) {//摺疊
            /**對應佈局的高度發生了變化
             從一個應有的高度到0的過程*/
            //            int widthMeasureSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
 

            //            int heightMeasureSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
            //            ll_des_container.measure(widthMeasureSpec, heightMeasureSpec);
            ValueAnimator animator = ValueAnimator.ofInt(start, end);
            animator.start();
            animator.addUpdateListener(new
 
 ValueAnimator.AnimatorUpdateListener() {
                @Override
                public void onAnimationUpdate(ValueAnimator animation) {
                    int animatedValue = (int) animation.getAnimatedValue();
                    //修改高度
                    LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) ll_des_container.getLayoutParams();
                    params.height = animatedValue;
                    ll_des_container.setLayoutParams(params);
                }
            });

        } else
 
 {  //開啟
            ValueAnimator animator = ValueAnimator.ofInt(end, start);
            animator.start();
            animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
                @Override
                public void onAnimationUpdate(ValueAnimator animation) {
                    int animatedValue = (int) animation.getAnimatedValue();
                    //修改高度
                    LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) ll_des_container.getLayoutParams();
                    params.height = animatedValue;
                    ll_des_container.setLayoutParams(params);
                }
            });
        }
        mIsOpen = !mIsOpen;
    }