How to add line dash in Flutter

Question

How to make a line dash in Flutter like this?

Answer 1

CustomPainter can help here as well. In this example is a vertical dash line but could be changed easily.

class LineDashedPainter extends CustomPainter {
  @override
  void paint(Canvas canvas, Size size) {
    var paint = Paint()..strokeWidth = 2;
    var max = 35;
    var dashWidth = 5;
    var dashSpace = 5;
    double startY = 0;
    while (max >= 0) {
      canvas.drawLine(Offset(0, startY), Offset(0, startY + dashWidth), paint);
      final space = (dashSpace + dashWidth);
      startY += space;
      max -= space;
    }
  }

  @override
  bool shouldRepaint(CustomPainter oldDelegate) => false;
}

and that use CustomPaint Widget:

CustomPaint(painter: LineDashedPainter())