Windows phone 8 二维码生成与扫描
1. 二维码的生成
二维码生成用到了一个第三方的插件(zxing.wp8.0)
根据指定的信息,生成对应的二维码。
代码很简单:
bool falg=tbk.Text==""?false:true;
if (falg==false)
{
MessageBox.Show("message lose, can't produce!");
return;
}
EncodingOptions options;//包含一些编码、大小等的设置
BarcodeWriter write = null;//用来生成二维码,对应的BarcodeReader用来解码
options = new QrCodeEncodingOptions
{
DisableECI = true,
CharacterSet = "UTF-8",
Width = 300,
Height = 300,
Margin = 3
};
write = new BarcodeWriter();
write.Format = BarcodeFormat.QR_CODE;
write.Options = options;
WriteableBitmap bitmap = write.Write(tbk.Text.Trim());
imgCode.Source = bitmap;
下面看下二维码的扫描(同样用的一个第三方的插件 Silverlight_ZXing_Core)
直接上代码
protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
{
_reader = new QRCodeReader();
_photoCamera = new PhotoCamera();
_photoCamera.Initialized += new EventHandler<CameraOperationCompletedEventArgs>(cam_Initialized); _videoBrush.SetSource(_photoCamera);
BarCodeRectInitial();
base.OnNavigatedTo(e);
}
//释放资源
protected override void OnNavigatingFrom(System.Windows.Navigation.NavigatingCancelEventArgs e)
{
if (_photoCamera != null)
{
_timer.Stop();
_photoCamera.CancelFocus();
_photoCamera.Dispose();
}
base.OnNavigatingFrom(e);
}
//初始化
void cam_Initialized(object sender, CameraOperationCompletedEventArgs e)
{
int width = Convert.ToInt32(_photoCamera.PreviewResolution.Width);
int height = Convert.ToInt32(_photoCamera.PreviewResolution.Height);
_luminance = new PhotoCameraLuminanceSource(width, height);
Dispatcher.BeginInvoke(() =>
{
_previewTransform.Rotation = _photoCamera.Orientation;
_timer.Start();
});
_photoCamera.FlashMode = FlashMode.Auto;
_photoCamera.Focus();
}
public void SetStillPicture()
{
int width = Convert.ToInt32(_photoCamera.PreviewResolution.Width);
int height = Convert.ToInt32(_photoCamera.PreviewResolution.Height);
int[] PreviewBuffer = new int[width * height];
_photoCamera.GetPreviewBufferArgb32(PreviewBuffer);
WriteableBitmap wb = new WriteableBitmap(width, height);
PreviewBuffer.CopyTo(wb.Pixels, 0);
MemoryStream ms = new MemoryStream();
wb.SaveJpeg(ms, wb.PixelWidth, wb.PixelHeight, 0, 80);
ms.Seek(0, SeekOrigin.Begin);
BitmapImage bi = new BitmapImage();
bi.SetSource(ms);
ImageBrush still = new ImageBrush();
still.ImageSource = bi;
frame.Fill = still;
still.RelativeTransform = new CompositeTransform() { CenterX = 0.5, CenterY = 0.5, Rotation = _photoCamera.Orientation };
}
private void ScanPreviewBuffer()
{
try
{
_photoCamera.GetPreviewBufferY(_luminance.PreviewBufferY);
var binarizer = new HybridBinarizer(_luminance);
var binBitmap = new BinaryBitmap(binarizer);
Result result = _reader.decode(binBitmap);
if (result != null)
{
_timer.Stop();
SetStillPicture();
BarCodeRectSuccess();
Dispatcher.BeginInvoke(() =>
{
//读取成功,结果存放在result.Text
NavigationService.Navigate(new Uri("/ScanResult.xaml?result=" + result.Text, UriKind.Relative));
});
}
else
{
_photoCamera.Focus();
}
}
catch
{ }
}