private void SwitchFlash(bool On)
{
try
{
Android.Hardware.Camera _camer = GetCamera();
if (On)
{
if (_camer != null)
{
var prms = _camer.GetParameters();
prms.FlashMode = Android.Hardware.Camera.Parameters.FlashModeTorch;
_camer.SetParameters(prms);
}
}
else
{
if (_camer != null)
{
var prms = _camer.GetParameters();
prms.FlashMode = Android.Hardware.Camera.Parameters.FlashModeOff;
_camer.SetParameters(prms);
}
}
}
catch (Exception es)
{
Log.Info("Release", "txtRecognizer.SetProcessor " + es.Message);
}
}
private void SetupCamera()
{
// Get the camera object directly from the parent activity
// This is safe and doesn't throw NullPointerException or "camera has been released"
// when resuming from a paused state, because it always takes the latest camera instance
//MainActivity parent = (PhototasticCamera)this.getContext();
//Camera camera = parent.getCamera();
if (_camera == null)
{
Console.WriteLine("setupCamera(): warning, camera is null");
return;
}
var parameters = _camera.GetParameters();
var bestPreviewSize = GetBestSize(parameters.SupportedPictureSizes, PreviewMaxWidth);
var bestPictureSize = GetBestSize(parameters.SupportedPictureSizes, PictureMaxWidth);
parameters.SetPreviewSize(bestPreviewSize.Width, bestPreviewSize.Height);
parameters.SetPreviewSize(bestPictureSize.Width, bestPictureSize.Height);
parameters.PreviewFormat = ImageFormatType.Nv21; // NV21 is the most supported format for preview frames
parameters.PictureFormat = ImageFormatType.Jpeg; // JPEG for full resolution images
// example of settings
try
{
parameters.FlashMode = Camera.Parameters.FlashModeOff;
}
catch (NoSuchMethodError e)
{
// remember that not all the devices support a given feature
Console.WriteLine($"setupCamera(): this camera ignored some unsupported settings. {e}");
}
_camera.SetParameters(parameters); // save everything
// print saved parameters
int prevWidth = _camera.GetParameters().PreviewSize.Width;
int prevHeight = _camera.GetParameters().PreviewSize.Height;
int picWidth = _camera.GetParameters().PictureSize.Width;
int picHeight = _camera.GetParameters().PictureSize.Height;
// here: previewBuffer initialization. It will host every frame that comes out
// from the preview, so it must be big enough.
// After that, it's linked to the camera with the setCameraCallback() method.
try
{
this._previewBuffer = new byte[prevWidth * prevHeight * ImageFormat.GetBitsPerPixel(_camera.GetParameters().PreviewFormat) / 8];
SetCameraCallBack();
}
catch (IOException e)
{
Console.WriteLine($"setupCamera(): error setting camera callback., {e}");
}
}
public CameraPreview(Context context, Android.Hardware.Camera camera) : base(context)
{
_mCamera = camera;
Holder.AddCallback(this);
_mSupportedPreviewSizes = _mCamera.GetParameters().SupportedPreviewSizes.ToList();
_mSupportedPictureSizes = _mCamera.GetParameters().SupportedPictureSizes.ToList();
Holder.SetType(SurfaceType.PushBuffers);
}
public void OnSurfaceTextureAvailable(SurfaceTexture surface, int width, int height)
{
_camera = Camera.Open(FindBackFacingCamera());
//_textureView.LayoutParameters = new FrameLayout.LayoutParams(width, WallpaperDesiredMinimumHeight);
var parameters = _camera.GetParameters();
try
{
var aspect = ((decimal)height) / ((decimal)width);
var previewSize = parameters.SupportedPreviewSizes
.OrderBy(s => Math.Abs(s.Width / (decimal)s.Height - aspect))
.First();
parameters.SetPreviewSize(previewSize.Width, previewSize.Height);
parameters.FocusMode = Camera.Parameters.FocusModeContinuousPicture;
_camera.SetParameters(parameters);
_camera.SetPreviewTexture(surface);
StartCamera();
}
catch (Java.IO.IOException ex)
{
// todo handle error here
System.Diagnostics.Debug.WriteLine(ex);
}
}
public void SurfaceCreated(ISurfaceHolder holder)
{
Logger.LogInfo(nameof(SurfaceHolderCallback), nameof(SurfaceCreated), "called.");
try
{
if (_Camera == null)
{
_Camera = Open();
_Parameters = _Camera.GetParameters();
if (SupportsFlash())
{
Logger.LogInfo(nameof(SurfaceHolderCallback), nameof(SurfaceCreated), "flash is supported. Enabling flash.");
_Parameters.FlashMode = Parameters.FlashModeTorch;
}
if (SupportsZoom())
{
Logger.LogInfo(nameof(SurfaceHolderCallback), nameof(SurfaceCreated), "zoom is supported. Enabling zoom.");
_Parameters.Zoom = _Parameters.MaxZoom / 2;
}
_Camera.SetParameters(_Parameters);
_Camera.SetPreviewDisplay(holder);
}
}
catch (Java.Lang.Exception ex)
{
Logger.LogError(ex);
}
}
public async void OnSurfaceTextureAvailable(SurfaceTexture surface, int width, int height)
{
if (ContextCompat.CheckSelfPermission(Activity, Manifest.Permission.Camera) != Permission.Granted)
{
ActivityCompat.RequestPermissions(Activity, new string[] { Manifest.Permission.Camera }, 50);
await(Element as CameraPage).Navigation.PopAsync();
//(Element as CameraPage).Cancel();
}
else
{
decimal aspect = 0;
camera = Android.Hardware.Camera.Open();
var parameters = camera.GetParameters();
if (GetOrientation())
{
aspect = ((decimal)height) / ((decimal)width);
}
else
{
aspect = ((decimal)width) / ((decimal)height);
}
var previewSize = parameters.SupportedPreviewSizes
.OrderBy(s => System.Math.Abs(s.Width / (decimal)s.Height - aspect))
.First();
parameters.SetPreviewSize(previewSize.Width, previewSize.Height);
camera.SetParameters(parameters);
camera.SetPreviewTexture(surface);
StartCamera();
}
}
public void OnSurfaceTextureAvailable(SurfaceTexture surface, int width, int height)
{
//If authorisation not granted for camera
if (ContextCompat.CheckSelfPermission(CurrentContext, Manifest.Permission.Camera) != Permission.Granted)
{
//ask for authorisation
ActivityCompat.RequestPermissions(CurrentContext, new String[] { Manifest.Permission.Camera }, 50);
}
else
{
camera = Android.Hardware.Camera.Open();
var parameters = camera.GetParameters();
var aspect = ((decimal)height) / ((decimal)width);
// Find the preview aspect ratio that is closest to the surface aspect
var previewSize = parameters.SupportedPreviewSizes
.OrderBy(s => Math.Abs(s.Width / (decimal)s.Height - aspect))
.First();
System.Diagnostics.Debug.WriteLine($"Preview sizes: {parameters.SupportedPreviewSizes.Count}");
parameters.SetPreviewSize(previewSize.Width, previewSize.Height);
camera.SetParameters(parameters);
camera.SetPreviewTexture(surface);
StartCamera();
}
}
public void SurfaceCreated(ISurfaceHolder holder)
{
//If authorisation not granted for camera
if (ContextCompat.CheckSelfPermission(CurrentContext, Manifest.Permission.Camera) != Permission.Granted)
{
//ask for authorisation
ActivityCompat.RequestPermissions(CurrentContext, new System.String[] { Manifest.Permission.Camera }, 50);
}
else
{
if (camera != null)
{
camera.Release();
camera = null;
}
camera = Android.Hardware.Camera.Open();
camera.SetDisplayOrientation(90);
Parameters parameters = camera.GetParameters();
parameters.FocusMode = Parameters.FocusModeContinuousVideo;
camera.SetParameters(parameters);
camera.SetPreviewDisplay(holder);
camera.StartPreview();
initRecorder();
camera.Unlock();
}
prepareRecorder();
}
public void OnAutoFocus(bool success, Android.Hardware.Camera camera)
{
var parameters = camera.GetParameters();
var supportedFocusModes = parameters.SupportedFocusModes;
var supportedFocusMode = cameraPage.GetSupportedFocusMode();
parameters.FocusMode = supportedFocusMode;
if (supportedFocusModes != null && supportedFocusModes.Any())
{
if (parameters.MaxNumFocusAreas > 0)
{
parameters.FocusAreas = null;
}
if (success)
{
TextView focusIndicatorTV = this.cameraPage.focusIndicator;
focusIndicatorTV.SetX(tapX);
focusIndicatorTV.SetY(tapY);
focusIndicatorTV.Visibility = ViewStates.Visible;
}
else
{
TextView focusIndicatorTV = this.cameraPage.focusIndicator;
focusIndicatorTV.Visibility = ViewStates.Gone;
}
camera.SetParameters(parameters);
camera.StartPreview();
}
}
public async Task GetPhoto()
{
_camera = Camera.Open();
var parameters = _camera.GetParameters();
var sizes = parameters.SupportedPictureSizes;
int index = 0;
for (int i = 0; i < sizes.Count; i++)
{
if (sizes[i].Width > 1200 && sizes[i].Width < 1300)
{
index = i;
}
}
parameters.SetPictureSize(sizes[index].Width, sizes[index].Height);
parameters.SetRotation(90);
parameters.SceneMode = Camera.Parameters.SceneModeAuto;
parameters.WhiteBalance = Camera.Parameters.WhiteBalanceAuto;
parameters.FocusMode = Camera.Parameters.FocusModeContinuousPicture;
parameters.PictureFormat = ImageFormatType.Jpeg;
parameters.JpegQuality = 100;
_camera.SetParameters(parameters);
_camera.SetPreviewCallback(this);
_camera.Lock();
SurfaceTexture st = new SurfaceTexture(100);
_camera.SetPreviewTexture(st);
_camera.StartPreview();
await TakePicture();
}
public void SurfaceChanged(ISurfaceHolder holder, [GeneratedEnum] Format format, int width, int height)
{
if (surfaceHolder.Surface == null)
{
return;
}
try
{
cameraInstance.StopPreview();
cameraInstance.SetPreviewDisplay(surfaceHolder);
Android.Hardware.Camera.Parameters parameters = cameraInstance.GetParameters();
Android.Hardware.Camera.Size optimalSize = CameraHelpers.GetOptimalPreviewSize(context, cameraInstance, width, height);
parameters.SetPreviewSize(optimalSize.Width, optimalSize.Height);
parameters.SetPictureSize(optimalSize.Width, optimalSize.Height);
parameters.FocusMode = Android.Hardware.Camera.Parameters.FocusModeContinuousPicture;
cameraInstance.SetParameters(parameters);
cameraInstance.SetDisplayOrientation(CameraHelpers.GetCameraOrientation(context));
cameraInstance.StartPreview();
}
catch (Exception e)
{
Log.Debug("Camera activity", "Error starting camera preview: " + e.Message);
}
}
static Task ToggleTorchAsync(bool switchOn)
{
return(Task.Run(() =>
{
lock (locker)
{
if (Platform.HasApiLevel(BuildVersionCodes.M) && !AlwaysUseCameraApi)
{
var cameraManager = Platform.CameraManager;
foreach (var id in cameraManager.GetCameraIdList())
{
var hasFlash = cameraManager.GetCameraCharacteristics(id).Get(CameraCharacteristics.FlashInfoAvailable);
if (Java.Lang.Boolean.True.Equals(hasFlash))
{
cameraManager.SetTorchMode(id, switchOn);
break;
}
}
}
else
{
if (camera == null)
{
if (surface == null)
{
surface = new SurfaceTexture(0);
}
#pragma warning disable CS0618 // Camera types are deprecated in Android 10+
camera = Camera.Open();
// Nexus 5 and some devices require a preview texture
camera.SetPreviewTexture(surface);
}
var param = camera.GetParameters();
// Deprecated in an earlier android version
param.FlashMode = switchOn ? Camera.Parameters.FlashModeTorch : Camera.Parameters.FlashModeOff;
camera.SetParameters(param);
if (switchOn)
{
camera.StartPreview();
}
else
{
camera.StopPreview();
camera.Release();
camera.Dispose();
#pragma warning restore CS0618 // Type or member is obsolete
camera = null;
surface.Dispose();
surface = null;
}
}
}
}));
}
public void SurfaceChanged(ISurfaceHolder holder, [GeneratedEnum] Format format, int width, int height)
{
if (holder.Surface == null)
{
return;
}
try
{
_mCamera.StopPreview();
}
catch (Exception e)
{
//TODO:KOA: remove Console!
Console.WriteLine(Localization.Errors.ErrorCameraPreview + e.Message);
}
try
{
var p = _mCamera.GetParameters();
p.SetPreviewSize(_mPreviewSize.Width, _mPreviewSize.Height);
if (p.SupportedFocusModes.Contains(Android.Hardware.Camera.Parameters.FocusModeContinuousVideo))
{
p.FocusMode = Android.Hardware.Camera.Parameters.FocusModeContinuousVideo;
_mCamera.SetParameters(p);
}
switch (Display.Rotation)
{
case SurfaceOrientation.Rotation0:
_mCamera.SetDisplayOrientation(90);
break;
case SurfaceOrientation.Rotation90:
break;
case SurfaceOrientation.Rotation180:
break;
case SurfaceOrientation.Rotation270:
_mCamera.SetDisplayOrientation(180);
break;
}
p.SetPreviewSize(_mPreviewSize.Width, _mPreviewSize.Height);
if (_mPictureSize != null)
{
p.SetPictureSize(_mPictureSize.Width, _mPictureSize.Height);
}
p.SetRotation(90);
_mCamera.SetParameters(p);
_mCamera.SetPreviewDisplay(holder);
_mCamera.StartPreview();
}
catch (Exception e)
{
//TODO:KOA: remove Console!
Console.WriteLine(Localization.Errors.ErrorCameraPreview + e.Message);
}
}
public void SetCamera(Camera camera)
{
mCamera = camera;
if (mCamera != null)
{
mSupportedPreviewSizes = mCamera.GetParameters()
.SupportedPreviewSizes;
RequestLayout();
}
}
public void OnPreviewFrame(byte[] data, Android.Hardware.Camera camera)
{
var paras = camera.GetParameters();
var imageformat = paras.PreviewFormat;
if (imageformat == Android.Graphics.ImageFormatType.Nv21)
{
Android.Graphics.YuvImage img = new Android.Graphics.YuvImage(data,
imageformat, paras.PreviewSize.Width, paras.PreviewSize.Height, null);
}
}
private void StartCamera()
{
var properties = _camera.GetParameters();
// Set the camera to autofocus and autoflash
properties.FocusMode = Camera.Parameters.FocusModeContinuousPicture;
properties.FlashMode = Camera.Parameters.FlashModeAuto;
_camera.SetParameters(properties);
SetCameraDisplayOrientation();
_camera.StartPreview();
}
public void SurfaceChanged(ISurfaceHolder holder, Format format, int w, int h)
{
// Now that the size is known, set up the camera parameters and begin
// the preview.
Camera.Parameters parameters = camera.GetParameters();
IList <Camera.Size> sizes = parameters.SupportedPreviewSizes;
Camera.Size optimalSize = GetOptimalPreviewSize(sizes, w, h);
parameters.SetPreviewSize(optimalSize.Width, optimalSize.Height);
camera.SetDisplayOrientation(90);
camera.SetParameters(parameters);
int dataBufferSize = (int)(optimalSize.Width * optimalSize.Height *
(ImageFormat.GetBitsPerPixel(camera.GetParameters().PreviewFormat) / 8.0));
_reader = new QRCodeReader();
camera.StartPreview();
}
public void SurfaceChanged(ISurfaceHolder holder, Android.Graphics.Format format, int w, int h)
{
// Now that the size is known, set up the camera parameters and begin
// the preview.
Camera.Parameters parameters = mCamera.GetParameters();
parameters.SetPreviewSize(mPreviewSize.Width, mPreviewSize.Height);
RequestLayout();
mCamera.SetParameters(parameters);
mCamera.StartPreview();
}
private void OpenCamera()
{
if (CheckSelfPermission(Manifest.Permission.Camera) != Permission.Granted)
{
RequestCameraPermission();
return;
}
camera = Open();
Parameters parameters = camera.GetParameters();
parameters.PictureFormat = ImageFormatType.Jpeg;
parameters.PreviewFormat = ImageFormatType.Nv21;
if (parameters.SupportedFocusModes.Contains(Parameters.FocusModeContinuousVideo))
{
parameters.FocusMode = Parameters.FocusModeContinuousVideo;
}
IList <Size> suportedPreviewSizes = parameters.SupportedPreviewSizes;
int i = 0;
for (i = 0; i < suportedPreviewSizes.Count; i++)
{
if (suportedPreviewSizes[i].Width < 1300)
{
break;
}
}
parameters.SetPreviewSize(suportedPreviewSizes[i].Width, suportedPreviewSizes[i].Height);
camera.SetParameters(parameters);
camera.SetDisplayOrientation(90);
camera.SetPreviewCallback(this);
camera.SetPreviewDisplay(surface.Holder);
camera.StartPreview();
//Get camera width
previewWidth = parameters.PreviewSize.Width;
//Get camera height
previewHeight = parameters.PreviewSize.Height;
//Resize SurfaceView Size
float scaledHeight = previewWidth * 1.0f * surface.Width / previewHeight;
float prevHeight = surface.Height;
ViewGroup.LayoutParams lp = surface.LayoutParameters;
lp.Width = surface.Width;
lp.Height = (int)scaledHeight;
surface.LayoutParameters = lp;
surface.Top = (int)((prevHeight - scaledHeight) / 2);
surface.DrawingCacheEnabled = true;
handlerThread = new HandlerThread("background");
handlerThread.Start();
//backgroundHandler = new MyHandler(handlerThread.Looper);
backgroundHandler = new MyHandler(Looper.MainLooper);
}
public CameraPreview(Context context, Android.Hardware.Camera camera) : base(context)
{
cameraInstance = camera;
this.context = context;
surfaceHolder = Holder;
surfaceHolder.AddCallback(this);
Android.Hardware.Camera.Parameters parameters = cameraInstance.GetParameters();
parameters.FocusMode = Android.Hardware.Camera.Parameters.FocusModeAuto;
cameraInstance.SetParameters(parameters);
}
public void TurnOn()
{
if (camera == null)
{
camera = Camera.Open();
}
if (camera == null)
{
return;
}
var p = camera.GetParameters();
var supportedFlashModes = p.SupportedFlashModes;
if (supportedFlashModes == null)
{
supportedFlashModes = new List <string>();
}
var flashMode = string.Empty;
if (supportedFlashModes.Contains(Android.Hardware.Camera.Parameters.FlashModeTorch))
{
flashMode = Android.Hardware.Camera.Parameters.FlashModeTorch;
}
if (!string.IsNullOrEmpty(flashMode))
{
p.FlashMode = flashMode;
camera.SetParameters(p);
}
camera.StartPreview();
try
{
camera.SetPreviewTexture(new SurfaceTexture(0));
}
catch { }
}
public void StartCamera(int camID, string flash, string resolution, string focuse)
{
StopCamera();
try { mCamera = Android.Hardware.Camera.Open(camID); }
catch (Exception)
{
try
{
byte[] dataPacker = ((MainActivity)MainActivity.global_activity).MyDataPacker("CAMNOT", System.
Text.Encoding.UTF8.GetBytes("vid"));
MainActivity.Soketimiz.BeginSend(dataPacker, 0, dataPacker.Length, SocketFlags.None, null, null);
}
catch (Exception) { }
return;
}
Android.Hardware.Camera.Parameters params_ = mCamera.GetParameters();
SetFlashModeOff(params_);
if (flash == "1")
{
FlashParam(params_);
}
///
params_.SetPreviewSize(int.Parse(resolution.Split('x')[0]),
int.Parse(resolution.Split('x')[1]));
///
if (focuse == "1")
{
SetFocusModeOn(params_);
}
///
SetSceneModeAuto(params_);
SetWhiteBalanceAuto(params_);
mCamera.SetParameters(params_);
try
{
mCamera.SetPreviewDisplay(hldr);
mCamera.SetPreviewCallback(this);
mCamera.StartPreview();
}
catch (Exception)
{
try
{
byte[] senddata = ((MainActivity)MainActivity.global_activity).MyDataPacker("CAMNOT", Encoding.UTF8.GetBytes("Can't start camera"));
MainActivity.Soketimiz.BeginSend(senddata, 0, senddata.Length, SocketFlags.None, null, null);
}
catch (Exception) { }
StopCamera();
return;
}
}
public void TurnOff()
{
if (camera == null)
{
camera = Camera.Open();
}
if (camera == null)
{
Console.WriteLine("Camera failed to initialize");
return;
}
var p = camera.GetParameters();
var supportedFlashModes = p.SupportedFlashModes;
if (supportedFlashModes == null)
{
supportedFlashModes = new List <string>();
}
var flashMode = string.Empty;
if (supportedFlashModes.Contains(Android.Hardware.Camera.Parameters.FlashModeTorch))
{
flashMode = Android.Hardware.Camera.Parameters.FlashModeOff;
}
if (!string.IsNullOrEmpty(flashMode))
{
p.FlashMode = flashMode;
camera.SetParameters(p);
}
camera.StopPreview();
//added on 1/3/2016 by aditmer to try to fix the ongoing issue on Android 6.x and the battery drain issue
camera.Release();
camera = null;
}
public void SurfaceCreated(ISurfaceHolder holder)
{
// throw new NotImplementedException();
// open camera's parameters
camera = Android.Hardware.Camera.Open();
camera.SetDisplayOrientation(90);
Android.Hardware.Camera.Parameters p = camera.GetParameters();
p.PictureFormat = ImageFormatType.Jpeg;
camera.SetParameters(p);
camera.SetPreviewCallback(this);
camera.SetPreviewDisplay(holder);
camera.StartPreview();
}
public void SwitchCamera(Camera camera)
{
SetCamera(camera);
try {
camera.SetPreviewDisplay(mHolder);
} catch (IOException exception) {
Log.Error(TAG, "IOException caused by setPreviewDisplay()", exception);
}
Camera.Parameters parameters = camera.GetParameters();
parameters.SetPreviewSize(mPreviewSize.Width, mPreviewSize.Height);
RequestLayout();
camera.SetParameters(parameters);
}
private byte[] ConvertYuvToJpeg(byte[] yuvData, Android.Hardware.Camera camera)
{
var cameraParameters = camera.GetParameters();
var width = cameraParameters.PreviewSize.Width;
var height = cameraParameters.PreviewSize.Height;
var yuv = new YuvImage(yuvData, cameraParameters.PreviewFormat, width, height, null);
var ms = new MemoryStream();
var quality = 80; // adjust this as needed
yuv.CompressToJpeg(new Rect(0, 0, width, height), quality, ms);
var jpegData = ms.ToArray();
return(jpegData);
}
public void ToggleFlashLight(Android.Hardware.Camera _myCamera)
{
var prams = _myCamera.GetParameters();
if (prams.FlashMode == Android.Hardware.Camera.Parameters.FlashModeOn)
{
prams.FlashMode = Android.Hardware.Camera.Parameters.FlashModeOff;
}
else
{
prams.FlashMode = Android.Hardware.Camera.Parameters.FlashModeOn;
}
_myCamera.SetParameters(prams);
}
public void OnSurfaceTextureAvailable(SurfaceTexture surface, int width, int height)
{
try {
_camera = Android.Hardware.Camera.Open(GetFrontCameraId());
_camera.SetDisplayOrientation(90);
var pictureSize = _camera.GetParameters().PictureSize;
var previewSize = _camera.GetParameters().PreviewSize;
// Need to flip around width and height because of the rotation
textureView.LayoutParameters = new RelativeLayout.LayoutParams(pictureSize.Height, pictureSize.Width);
var aspectRatio = ((double)pictureSize.Height) / ((double)pictureSize.Width);
var lp = this.gameoverOverlayLayer.LayoutParameters;
lp.Height = (int)(Resources.DisplayMetrics.HeightPixels * 0.6);
lp.Width = (int)(lp.Height * aspectRatio);
this.gameoverOverlayLayer.LayoutParameters = lp;
_camera.SetPreviewTexture(surface);
_camera.StartPreview();
} catch (Java.IO.IOException ex) {
System.Console.WriteLine(ex.Message);
}
}
public void OnSurfaceTextureAvailable(SurfaceTexture surface, int width, int height)
{
{
{
int cameraCount = Android.Hardware.Camera.NumberOfCameras;
int cameraId = 0;
Android.Hardware.Camera.CameraInfo cameraInfo = new Android.Hardware.Camera.CameraInfo();
for (int camIdx = 0; camIdx < cameraCount; camIdx++)
{
Android.Hardware.Camera.GetCameraInfo(camIdx, cameraInfo);
if (cameraInfo.Facing == Android.Hardware.CameraFacing.Front)
{
camera = Android.Hardware.Camera.Open(camIdx);
cameraId = camIdx;
break;
}
}
if (camera == null)
{
camera = Android.Hardware.Camera.Open();
}
}
var parameters = camera.GetParameters();
var aspect = ((decimal)height) / ((decimal)width);
// Find the preview aspect ratio that is closest to the surface aspect
//var previewSize = parameters.SupportedPreviewSizes
// .OrderBy(s => Math.Abs(s.Width / (decimal)s.Height - aspect))
// .First();
var previewSize = parameters.SupportedPreviewSizes[0];
System.Diagnostics.Debug.WriteLine($"Preview sizes: {parameters.SupportedPreviewSizes.Count}");
mainLayout.LayoutParameters.Height = previewSize.Height;
mainLayout.LayoutParameters.Width = previewSize.Width;
parameters.SetPreviewSize(previewSize.Width, previewSize.Height);
camera.SetParameters(parameters);
camera.SetPreviewTexture(surface);
StartCamera();
}
}
public List <CameraPixels> GetCameraResolution()
{
List <CameraPixels> camPixels = new List <CameraPixels>();
if (Build.VERSION.SdkInt >= BuildVersionCodes.Lollipop)
{
//Lolipop and above
CameraManager camMan = (CameraManager)mactivity.GetSystemService(Context.CameraService);
string[] camId = camMan.GetCameraIdList();
CameraCharacteristics camChar = camMan.GetCameraCharacteristics(camId[0]); //0 - mostly for back cam
StreamConfigurationMap camMap = (StreamConfigurationMap)camChar.Get(CameraCharacteristics.ScalerStreamConfigurationMap);
Android.Util.Size[] sizes = camMap.GetOutputSizes((int)ImageFormatType.Jpeg);
System.Diagnostics.Debug.WriteLine($"Camera sizes: {sizes.Length}");
foreach (var size in sizes)
{
//System.Diagnostics.Debug.WriteLine($"Sizes: {size.Width} x {size.Height} = {Convert.ToDouble(size.Width) * Convert.ToDouble(size.Height) / Convert.ToDouble(1024000)} megs");
camPixels.Add(new CameraPixels()
{
Height = size.Height,
Width = size.Width,
Megapixels = Math.Round(Convert.ToDecimal(size.Width) * Convert.ToDecimal(size.Height) / Convert.ToDecimal(1000000), 1)
});
}
}
else
{
//pre-lolipop
Android.Hardware.Camera cam = Android.Hardware.Camera.Open();
Android.Hardware.Camera.Parameters camParam = cam.GetParameters();
IList <Android.Hardware.Camera.Size> plSizes = camParam.SupportedPictureSizes;
foreach (var size in plSizes)
{
System.Diagnostics.Debug.WriteLine($"Sizes: {size.Width} x {size.Height} = {Convert.ToDouble(size.Width) * Convert.ToDouble(size.Height) / Convert.ToDouble(1024000)} megs");
camPixels.Add(new CameraPixels()
{
Height = size.Height,
Width = size.Width,
Megapixels = Math.Round(Convert.ToDecimal(size.Width) * Convert.ToDecimal(size.Height) / Convert.ToDecimal(1000000), 1)
});
}
cam.Release();
}
return(camPixels);
}
private static void SetAutoFocus(Camera camera)
{
var parameters = camera.GetParameters();
var focusModes = parameters.SupportedFocusModes;
if (focusModes.Contains(Camera.Parameters.FocusModeAuto))
parameters.FocusMode = Camera.Parameters.FocusModeAuto;
camera.SetParameters(parameters);
}
public void SetCamera (Camera camera)
{
mCamera = camera;
if (mCamera != null) {
mSupportedPreviewSizes = mCamera.GetParameters ()
.SupportedPreviewSizes;
RequestLayout ();
}
}
public void SwitchCamera (Camera camera)
{
SetCamera (camera);
try {
camera.SetPreviewDisplay (mHolder);
} catch (IOException exception) {
Log.Error (TAG, "IOException caused by setPreviewDisplay()", exception);
}
Camera.Parameters parameters = camera.GetParameters ();
parameters.SetPreviewSize (mPreviewSize.Width, mPreviewSize.Height);
RequestLayout();
camera.SetParameters (parameters);
}
public void SurfaceCreated(ISurfaceHolder holder)
{
try
{
// if only front camera, get it
camera = Camera.Open(0);
Camera.Parameters p = camera.GetParameters();
p.PictureFormat = Android.Graphics.ImageFormatType.Jpeg;
camera.EnableShutterSound(true);
// fix camera rotation
camera.SetDisplayOrientation(0);
camera.SetParameters(p);
camera.SetPreviewCallback(this);
camera.Lock();
camera.SetPreviewDisplay(holder);
camera.StartPreview();
}
catch (Java.IO.IOException e)
{
}
}