flutter去掉Container的默认边线

由于是两个别的颜色的纯色背景，导致中间有一条白色的细线，在真机上看着还是挺明显的，

代码就是两个普通的container：

            Container(
              width: 300.0,
              height: 100.0,
              color: Color(0XFF302F4F),
              child: Text("上面的container"),
            ),
            Container(
              width: 300.0,
              height: 100.0,
              color: Color(0XFF302F4F),
              child: Text("下面的container"),
            )

如何去掉这条尴尬的白线呢？其实很简单，container默认是有边界的，只要将边界用decoration包裹，设置

BorderSide 的值为0 即可：

            Container(
              width: 300.0,
              height: 100.0,
//              color: Color(0XFF302F4F),
              decoration: BoxDecoration(
                border: Border(bottom: BorderSide(color: Color(0XFF302F4F),width: 0.0)),
                  gradient: LinearGradient(
                      colors: [Color(0XFF302F4F), Color(0XFF302F4F)])),
              child: Text("上面的container",),
            ),
            Container(
              width: 300.0,
              height: 100.0,
//              color: Color(0XFF302F4F),
              decoration: BoxDecoration(
                  border: Border(top: BorderSide(color: Color(0XFF302F4F),width: 0.0)),
                  gradient: LinearGradient(
                      colors: [Color(0XFF302F4F), Color(0XFF302F4F)])),
              child: Text("下面的container"),
            )