Flutter generates a QR code, and pictures can be added in the center

1. Import dependencies

In the pubspec.yaml file, add dependencies and execute the flutter pub get command

  # 二维码
  qr_flutter: ^4.0.0

Attributes	type	describe
version	int	QrVersions.autoor a value between 1 and 40
errorCorrectionLevel	int	value QrErrorCorrectLevel. For example: QrErrorCorrectLevel.L.
size	double	Image (square) size. If not assigned a value will be automatically resized using the minimum size constraint.
padding	EdgeInsets	QR code padding
backgroundColor	Color	background color, default none
foregroundColor	Color	Foreground color, default is black
gapless	bool	Add an extra pixel to prevent gaps (default true)
errorStateBuilder	QrErrorBuilder	WidgetAllows you to display an error status when an error occurs while rendering the QR code (for example: version too low, input too long, etc.).
constrainErrorBounds	bool	If true, errors Widgetwill be limited to the square where the QR code is drawn. If false, the error state Widgetwill grow/shrink to whatever size it needs.
embeddedImage	ImageProvider	Image overlaid in the center of the QR code
embeddedImageStyle	QrEmbeddedImageStyle	Style embedded images
embeddedImageEmitsError	bool	If true, any failure to load an embedded image will trigger errorStateBuilderor render an empty one Container. If false, the QR code will be rendered and the embedded image will be ignored.
semanticsLabel	String	semanticsLabelWill be used by screen readers to describe the content of the QR code.

2. Import the header file

import 'package:qr_flutter/qr_flutter.dart';

3. Use

    Container(
      width: getScreenWidth(),
      alignment: Alignment.topCenter,
      child: QrImage(
        padding: EdgeInsets.all(20),//边框
        data: 'This QR code will show the error state instead',//二维码携带信息
        size: 200,//二维码大小
        backgroundColor: Colors.white,//背景色
        foregroundColor: Colors.black,//绘制方块颜色
        embeddedImage: AssetImage('assets/images/order/order_activity.png'),//二维码中心图片
        embeddedImageStyle: QrEmbeddedImageStyle(
          //中心图片大小
          size: Size(40, 40),
        ),
      ),
    )

actual effect: