如何在flutter中使用Paint()在自定义绘图中编写文本

class MyCustomPainter extends CustomPainter {
  @override
  void paint(Canvas canvas, Size size) {
    // 在这里进行绘图操作
  }

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

class MyCustomPainter extends CustomPainter {
  @override
  void paint(Canvas canvas, Size size) {
    Paint textPaint = Paint()
      ..color = Colors.black
      ..textStyle = TextStyle(fontSize: 20);

    canvas.drawText(Offset(50, 50), "Hello, Flutter!", textPaint);
  }

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

class MyHomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Custom Paint"),
      ),
      body: CustomPaint(
        painter: MyCustomPainter(),
      ),
    );
  }
}