[英]How to convert an Image into a QR code in Flutter?
I am trying to convert an image into a QR code and read the qr code to construct back the image.我正在尝试将图像转换为二维码并读取二维码以构造回图像。 I can place an image in the center of a QR code using qr_flutter but I am unable figure out a way to represent an entire image as a QR code (possibly QR 40).
我可以使用 qr_flutter 将图像放置在 QR 码的中心,但我无法找到将整个图像表示为 QR 码(可能是 QR 40)的方法。 If anyone can help me with this, it will be really helpful.
如果有人可以帮助我解决这个问题,那将非常有帮助。
Future<Uint8List> _getWidgetImage() async {
try {
RenderRepaintBoundary boundary =
_renderObjectKey.currentContext.findRenderObject();
ui.Image image = await boundary.toImage(pixelRatio: 3.0);
ByteData byteData =
await image.toByteData(format: ui.ImageByteFormat.png);
var pngBytes = byteData.buffer.asUint8List();
var bs64 = base64Encode(pngBytes);
debugPrint(bs64.length.toString());
return pngBytes;
} catch (exception) {}
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: Column(children: [
RepaintBoundary(
key: _renderObjectKey,
child: QrImage(
data: "some text",
size: 300.0,
version: 10,
backgroundColor: Colors.white,
),
),
RaisedButton(onPressed: () {
_getWidgetImage();
})
]));
}
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