if (llSrBottom.getHeight() < DensityUtil.dip2px(500)) {
            LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams) viewSrBottom.getLayoutParams();
            layoutParams.height = DensityUtil.dip2px(320);
            viewSrBottom.setLayoutParams(layoutParams);


        }

tip

还可以往里面添加属性

RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        params.addRule(RelativeLayout.CENTER_HORIZONTAL);
        params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);