Xamarin camera resolution
I made my own camera app in Xamarin Visual Studio, it accepts very low resolution images, so I added this code snippet.
public void OnSurfaceTextureAvailable(Android.Graphics.SurfaceTexture surface, int w, int h)
{
_camera = Android.Hardware.Camera.Open();
Android.Hardware.Camera.Parameters param = _camera.GetParameters();
IList<Android.Hardware.Camera.Size> supportedSizes = param.SupportedPictureSizes;
Android.Hardware.Camera.Size sizePicture = supportedSizes[0];
param.SetPictureSize(sizePicture.Height, sizePicture.Width);
_camera.SetParameters(param);
var previewSize = _camera.GetParameters().PreviewSize;
_textureView.LayoutParameters =
new FrameLayout.LayoutParams(h, w, GravityFlags.Center);
try
{
_camera.SetPreviewTexture(surface);
_camera.StartPreview();
}
catch (Java.IO.IOException ex)
{
Console.WriteLine(ex.Message);
}
_textureView.Rotation = 90.0f;
}
In the firts line, I get the camera parameters, after which I get the supported image size after that, I select firts ([0]), and eventually I set the image size,
Android.Hardware.Camera.Parameters param = _camera.GetParameters();
IList<Android.Hardware.Camera.Size> supportedSizes = param.SupportedPictureSizes;
Android.Hardware.Camera.Size sizePicture = supportedSizes[0];
param.SetPictureSize(sizePicture.Height, sizePicture.Width);
_camera.SetParameters(param);
But when I run the code this message appears:
Unhandled Exception:
Java.Lang.RuntimeException: setParameters failed
what is wrong here? I cannot set any supported size returned by the function? how to choose any of them, for example the first one? is there something else I should consider?
source to share
You have parameters width
and height
transposed in such a way that you end up with an invalid (unsupported) image size.
param.SetPictureSize(sizePicture.Width, sizePicture.Height);
void setPictureSize (int width, int height)
re: https://developer.android.com/reference/android/hardware/Camera.Parameters.html
source to share