使用此代码创建这样的形状

import 'dart:ui' as ui;

//Add this CustomPaint widget to the Widget Tree
CustomPaint(
size: Size(WIDTH, (WIDTH*0.3542581280172481).toDouble()), //You can  Replace [WIDTH] with your desired width for Custom Paint and height will be calculated automatically
painter: RPSCustomPainter(),
)

//Copy this CustomPainter code to the Bottom of the File
class RPSCustomPainter extends CustomPainter {
@override
void paint(Canvas canvas, Size size) {
        
Path path_0 = Path();
path_0.moveTo(size.width*1.156952,size.height*3.936736);
path_0.lineTo(size.width*1.968605,size.height*3.949394);
path_0.cubicTo(size.width*1.968605,size.height*3.949394,size.width*2.151398,size.height*4.204300,size.width*2.152460,size.height*4.443043);
path_0.cubicTo(size.width*2.153491,size.height*4.675744,size.width*1.977573,size.height*4.936736,size.width*1.977573,size.height*4.936736);
path_0.lineTo(size.width*1.152468,size.height*4.898765);
path_0.lineTo(size.width*1.156952,size.height*3.936736);
path_0.close();

Paint paint_0_fill = Paint()..style=PaintingStyle.fill;
paint_0_fill.color = Color.fromRGBO(216, 216, 216,1.0).withOpacity(1.0);
canvas.drawPath(path_0,paint_0_fill);

}

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