本文整理汇总了C#中ZXing.Mobile.MobileBarcodeScanningOptions.GetResolution方法的典型用法代码示例。如果您正苦于以下问题：C# MobileBarcodeScanningOptions.GetResolution方法的具体用法？C# MobileBarcodeScanningOptions.GetResolution怎么用？C# MobileBarcodeScanningOptions.GetResolution使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类ZXing.Mobile.MobileBarcodeScanningOptions的用法示例。
在下文中一共展示了MobileBarcodeScanningOptions.GetResolution方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: StartScanningAsync
public async Task StartScanningAsync (Action<Result> scanResultCallback, MobileBarcodeScanningOptions options = null)
{
this.callback = scanResultCallback;
this.scanningOptions = options ?? MobileBarcodeScanningOptions.Default;
lastPreviewAnalysis = DateTime.UtcNow.AddMilliseconds (this.scanningOptions.InitialDelayBeforeAnalyzingFrames);
isAnalyzing = true;
Console.WriteLine ("StartScanning");
CheckCameraPermissions ();
var perf = PerformanceCounter.Start ();
GetExclusiveAccess ();
try {
var version = Build.VERSION.SdkInt;
if (version >= BuildVersionCodes.Gingerbread) {
Android.Util.Log.Debug (MobileBarcodeScanner.TAG, "Checking Number of cameras...");
var numCameras = Camera.NumberOfCameras;
var camInfo = new Camera.CameraInfo ();
var found = false;
Android.Util.Log.Debug (MobileBarcodeScanner.TAG, "Found " + numCameras + " cameras...");
var whichCamera = CameraFacing.Back;
if (this.scanningOptions.UseFrontCameraIfAvailable.HasValue && this.scanningOptions.UseFrontCameraIfAvailable.Value)
whichCamera = CameraFacing.Front;
for (int i = 0; i < numCameras; i++) {
Camera.GetCameraInfo (i, camInfo);
if (camInfo.Facing == whichCamera) {
Android.Util.Log.Debug (MobileBarcodeScanner.TAG, "Found " + whichCamera + " Camera, opening...");
camera = Camera.Open (i);
cameraId = i;
found = true;
break;
}
}
if (!found) {
Android.Util.Log.Debug (MobileBarcodeScanner.TAG, "Finding " + whichCamera + " camera failed, opening camera 0...");
camera = Camera.Open (0);
cameraId = 0;
}
} else {
camera = Camera.Open ();
}
if (camera == null)
Android.Util.Log.Debug (MobileBarcodeScanner.TAG, "Camera is null :(");
camera.SetPreviewCallback (this);
} catch (Exception ex) {
ShutdownCamera ();
Console.WriteLine ("Setup Error: " + ex);
}
PerformanceCounter.Stop (perf, "Camera took {0}ms");
if (!surfaceChanged)
await waitSurface.WaitAsync ();
if (camera == null)
return;
perf = PerformanceCounter.Start ();
var parameters = camera.GetParameters ();
parameters.PreviewFormat = ImageFormatType.Nv21;
var availableResolutions = new List<CameraResolution> ();
foreach (var sps in parameters.SupportedPreviewSizes) {
availableResolutions.Add (new CameraResolution {
Width = sps.Width,
Height = sps.Height
});
}
// Try and get a desired resolution from the options selector
var resolution = scanningOptions.GetResolution (availableResolutions);
// If the user did not specify a resolution, let's try and find a suitable one
if (resolution == null) {
// Loop through all supported sizes
foreach (var sps in parameters.SupportedPreviewSizes) {
// Find one that's >= 640x360 but <= 1000x1000
// This will likely pick the *smallest* size in that range, which should be fine
if (sps.Width >= 640 && sps.Width <= 1000 && sps.Height >= 360 && sps.Height <= 1000) {
resolution = new CameraResolution {
Width = sps.Width,
Height = sps.Height
};
//.........这里部分代码省略.........