适配-图片的宽度精确计算

LinearLayout.LayoutParams linearParams = (LinearLayout.LayoutParams) viewHolder.mIvProduct.getLayoutParams();
linearParams.width = StringUtils.getScreenWidth(context) / 2 -StringUtils.dip2px(context,35/2) ;
linearParams.height = linearParams.width;
viewHolder.mIvProduct.setLayoutParams(linearParams);

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