ArcProgressIndicator.dart

class DownloadProgressIndicator extends StatelessWidget {

  DownloadProgressIndicator({
    this.color =Colors.blue,
    this.backgroundColor = Colors.black12,
    this.content,
    this.value,
    this.strokeWidth = 4.0,
  });

  final Color color;
  final Color backgroundColor;
  final Widget content;
  final double value;
  final double strokeWidth;

  @override
  Widget build(BuildContext context) {
    return Stack(
      fit: StackFit.expand,
      children: <Widget>[
        Transform.rotate(
          angle: pi / 180 * 227,
                  child: backgroundColor != null ? 
          CircularProgressIndicator(
            valueColor: AlwaysStoppedAnimation(backgroundColor),
            value: .75,
            strokeWidth: strokeWidth,
          ): Container(),
        ),
        Transform.rotate(
          angle: pi / 180 * 227,
                  child: CircularProgressIndicator(
            valueColor: AlwaysStoppedAnimation(color),
            value: value * .75,
            strokeWidth: strokeWidth,
          ),
        ),
        content != null ? 
        Center(
          child: content,
        ) : Container(),
      ],
    );
  }
}

screen.dart

class MyScreen extends StatelessWidget {

Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("Test of list tile"),),
      body: Center(
        child: SizedBox(
            width: 50,
            height: 50,
            child: DownloadProgressIndicator(
              value: .5,
            )
        ),
      ),
    );
  } 
}