您可以使用Stack Widget：显示捕获的图像，并在其上方添加一个使用CustomPainter类的窗口小部件。我假设绘制完图像后，您要将所有内容保存为图像。为此，您应该看看RepaintBoundary类。

也许这段代码可以为您提供帮助。

$private = DB::table('privacy_settings')->where("city",0)->get();
print_r($private);

$data['users'] = $users->where("city",0)->orderBy('id','DESC')->skip($offset)->take($perPage)->get()->toArray();
print_r($data['users']);

查看下面的代码，来自@LuckyDog的引用，但是图片被调整了大小，并且列表点在图片高度范围内。

class ImagePainter extends CustomPainter {
  ImagePainter({this.image,this.pointsList});
  ui.Image image;

  List<DrawingPoints> pointsList;
  List<Offset> offsetPoints = List();

  List<Offset> points = List();

  // final Paint painter = new Paint()


  @override
  void paint(Canvas canvas,Size size) {
    // canvas.drawImage(this.image,Offset(0.0,0.0),Paint());
    final imageSize = Size(image.width.toDouble(),image.height.toDouble());
    final src = Offset.zero & imageSize;
    final dst = Offset.zero & size;
    // canvas.pic
    canvas.drawImageRect(this.image,src,dst,Paint());
    // for (Offset offset in points) {
    //   canvas.drawCircle(offset,10,painter);
    // }
    pointsList = pointsList.map((e) {
      if (e != null) {
        if (e.points.dy <= dst.height) {
          return e;
        }
      }

      return null;
    }).toList();
    for (int i = 0; i < pointsList.length - 1; i++) {
      if (pointsList[i] != null && pointsList[i + 1] != null) {
        canvas.drawLine(pointsList[i].points,pointsList[i + 1].points,pointsList[i].paint);
      } else if (pointsList[i] != null && pointsList[i + 1] == null) {
        offsetPoints.clear();
        offsetPoints.add(pointsList[i].points);
        offsetPoints.add(Offset(
            pointsList[i].points.dx + 0.1,pointsList[i].points.dy + 0.1));
        canvas.drawPoints(
            ui.PointMode.points,offsetPoints,pointsList[i].paint);
      }
    }
  }

  @override
  bool shouldRepaint(CustomPainter oldDelegate) {
    return true;
  }
}