private Camera.Parameters GetModifiedParameters(Camera.Parameters oldParameters)
{
Camera.Parameters newParameters = oldParameters;
Camera.Size size = FindMaxSize(newParameters.SupportedPictureSizes);
newParameters.SetPreviewSize(640, 480);
newParameters.SetPictureSize(size.Width, size.Height);
newParameters.Set("contrast", "0");
newParameters.FlashMode = Camera.Parameters.FlashModeOff;
newParameters.FocusMode = Camera.Parameters.FocusModeAuto;
newParameters.SceneMode = Camera.Parameters.SceneModeAuto;
//newParameters.AutoExposureLock = false;
newParameters.WhiteBalance = Camera.Parameters.WhiteBalanceAuto;
//newParameters.ExposureCompensation = -12;
newParameters.PictureFormat = Android.Graphics.ImageFormat.Jpeg;
newParameters.JpegQuality = 100;
int angle = _cameraInfo.CalculateRotationAngle(CAMERA_ID);
newParameters.SetRotation(angle);
return(newParameters);
}
protected override void OnLayout(bool changed, int left, int top, int right, int bottom)
{
if (!changed)
{
return;
}
int width = right - left;
int height = bottom - top;
int previewWidth = width;
int previewHeight = height;
if (previewSize != null)
{
Display display = context.GetSystemService(Context.WindowService).JavaCast <IWindowManager>().DefaultDisplay;
switch (display.Rotation)
{
case SurfaceOrientation.Rotation0:
previewWidth = previewSize.Height;
previewHeight = previewSize.Width;
break;
case SurfaceOrientation.Rotation90:
previewWidth = previewSize.Width;
previewHeight = previewSize.Height;
break;
case SurfaceOrientation.Rotation180:
previewWidth = previewSize.Height;
previewHeight = previewSize.Width;
break;
case SurfaceOrientation.Rotation270:
previewWidth = previewSize.Width;
previewHeight = previewSize.Height;
break;
}
}
int scaledChildHeight = previewHeight * width / previewWidth;
cameraView.Layout(0, height - scaledChildHeight, width, height);
Camera.Parameters camParams = Camera.GetParameters();
if (base.Resources.Configuration.Orientation == global::Android.Content.Res.Orientation.Landscape)
{
camParams.Set("orientation", "landscape");
camParams.SetRotation(0);
Camera.SetDisplayOrientation(0);
}
else
{
camParams.Set("orientation", "portrait");
camParams.SetRotation(90);
Camera.SetDisplayOrientation(90);
}
if (isVideo && camParams.SupportedFocusModes.Contains(Camera.Parameters.FocusModeContinuousVideo))
{
camParams.FocusMode = Camera.Parameters.FocusModeContinuousVideo;
}
else if (!isVideo && camParams.SupportedFocusModes.Contains(Camera.Parameters.FocusModeContinuousPicture))
{
camParams.FocusMode = Camera.Parameters.FocusModeContinuousPicture;
}
else if (camParams.SupportedFocusModes.Contains(Camera.Parameters.FocusModeAuto))
{
camParams.FocusMode = Camera.Parameters.FocusModeAuto;
}
Camera.SetParameters(camParams);
}