public void Torch(bool on)
{
if (!this.Context.PackageManager.HasSystemFeature(PackageManager.FeatureCameraFlash))
{
Android.Util.Log.Info("ZXING", "Flash not supported on this device");
return;
}
if (!PlatformChecks.HasFlashlightPermission(this.Context))
{
var msg = "ZXing.Net.Mobile requires permission to use the Flash (" + PlatformChecks.PERMISSION_FLASHLIGHT + "), but was not found in your AndroidManifest.xml file.";
Android.Util.Log.Error("ZXing.Net.Mobile", msg);
throw new UnauthorizedAccessException(msg);
}
if (camera == null)
{
Android.Util.Log.Info("ZXING", "NULL Camera");
return;
}
var p = camera.GetParameters();
var supportedFlashModes = p.SupportedFlashModes;
if (supportedFlashModes == null)
{
supportedFlashModes = new List <string>();
}
var flashMode = string.Empty;
if (on)
{
if (supportedFlashModes.Contains(Android.Hardware.Camera.Parameters.FlashModeTorch))
{
flashMode = Android.Hardware.Camera.Parameters.FlashModeTorch;
}
else if (supportedFlashModes.Contains(Android.Hardware.Camera.Parameters.FlashModeOn))
{
flashMode = Android.Hardware.Camera.Parameters.FlashModeOn;
}
}
else
{
if (supportedFlashModes.Contains(Android.Hardware.Camera.Parameters.FlashModeOff))
{
flashMode = Android.Hardware.Camera.Parameters.FlashModeOff;
}
}
if (!string.IsNullOrEmpty(flashMode))
{
p.FlashMode = flashMode;
camera.SetParameters(p);
}
}
void CheckPermissions()
{
var perf = PerformanceCounter.Start();
Android.Util.Log.Debug("ZXing.Net.Mobile", "Checking Camera Permissions...");
if (!PlatformChecks.HasCameraPermission(this.Context))
{
var msg = "ZXing.Net.Mobile requires permission to use the Camera (" + PlatformChecks.PERMISSION_CAMERA + "), but was not found in your AndroidManifest.xml file.";
Android.Util.Log.Error("ZXing.Net.Mobile", msg);
throw new UnauthorizedAccessException(msg);
}
PerformanceCounter.Stop(perf, "CheckPermissions took {0}ms");
}