How to add line dash in Flutter

Question

How to make a line dash in Flutter like this?

Answer 1

Create this class:

class DotWidget extends StatelessWidget {
  final double totalWidth, dashWidth, emptyWidth, dashHeight;

  final Color dashColor;

  const DotWidget({
    this.totalWidth = 300,
    this.dashWidth = 10,
    this.emptyWidth = 5,
    this.dashHeight = 2,
    this.dashColor = Colors.black,
    Key key,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Row(
      mainAxisSize: MainAxisSize.min,
      children: List.generate(
        totalWidth ~/ (dashWidth + emptyWidth),
            (_) => Container(
          width: dashWidth,
          height: dashHeight,
          color: dashColor,
          margin: EdgeInsets.only(left: emptyWidth / 2, right: emptyWidth / 2),
        ),
      ),
    );
  }
}

Usage:

Use it like any other widget

 child: DotWidget(
   dashColor: Colors.black,
   dashHeight: 2,
   dashWidth: 100,
 )