将图像插入容器Flutter应用中

更换容器可以正常工作

new Container(
      height: 120.0,
      width: 120.0,
      decoration: new BoxDecoration(
        image: DecorationImage(
          image: new AssetImage(
              'assets/assets/alucard.jpg'),
          fit: BoxFit.fill,
        ),
        shape: BoxShape.circle,
      ),
    )