Android 最保险的获取控件的高度

  flowlayout.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
                @Override
                public void onGlobalLayout() {
                    flowlayout.getViewTreeObserver().removeGlobalOnLayoutListener(this);
                  
                    ViewGroup.LayoutParams layoutParams = scrollview.getLayoutParams();
                    scrollview.setLayoutParams(layoutParams);
                    layoutParams.height = flowlayout.getMeasuredHeight();
                    scrollview.setLayoutParams(layoutParams);
                }


            });