public void SurfaceCreated(ISurfaceHolder holder)
{
// The Surface has been created, now tell the camera where to draw the preview.
try
{
// _camera.SetPreviewDisplay(holder);
Parameters parameters = _camera.GetParameters();
foreach (var previewSize in _camera.GetParameters().SupportedPreviewSizes)
{
// if the size is suitable for you, use it and exit the loop.
parameters.SetPreviewSize(previewSize.Width, previewSize.Height);
break;
}
_camera.SetParameters(parameters);
_camera.SetPreviewDisplay(_holder);
_camera.StartPreview();
}
catch (IOException e)
{
Log.Debug(Tag.ToString(), "Error setting camera preview: " + e.Message);
}
}
public void OnPictureTaken(byte[] data, Camera camera)
{
if (data != null)
{
try
{
TurnOnFocusLockIfNothingCaptured();
var wasPreviewRestarted = false;
try
{
_camera.StartPreview();
wasPreviewRestarted = true;
}
catch
{
// restarting preview failed, try again later, some devices are just weird
}
_cameraModule.CapturedImage = data;
if (!wasPreviewRestarted)
{
_camera.StartPreview();
}
}
catch (Exception e)
{
_cameraModule.ErrorMessage = e.ToString();
}
}
}
void TakePhotoButtonTapped(object sender, EventArgs e)
{
//if camera isn't started
if (!_isCameraStarted)
{
return;
}
camera.StopPreview();
//Gets bitmap from the textureView
var bitmap = textureView.Bitmap;
//Converts bitmap to byte[]
byte[] bitmapData;
using (var stream = new MemoryStream())
{
bitmap.Compress(Bitmap.CompressFormat.Png, 0, stream);
bitmapData = stream.ToArray();
}
//Send a message to App.axml to open next page
MessagingCenter.Send <App, byte[]>(App.Current as App, "OpenRestaurantResultPage", bitmapData);
camera.StartPreview();
}
public void SurfaceChanged(ISurfaceHolder holder, [GeneratedEnum] Format format, int width, int height)
{
if (Holder.Surface == null)
{
return;
}
try
{
_camera.StopPreview();
}
catch (Exception)
{
// ignore: tried to stop a non-existent preview
}
try
{
// start preview with new settings
_camera.SetPreviewDisplay(Holder);
_camera.StartPreview();
}
catch (Exception e)
{
Log.Debug("", "Error starting camera preview: " + e.Message);
}
}
private void CaptureClicked(object sender, EventArgs e)
{
try
{
_camera.StartPreview();
_camera.TakePicture(null, null, this);
}
catch (Exception ex)
{
throw;
}
}
/// <summary>
/// Take a picture.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void SnapButtonClick(object sender, EventArgs e)
{
try
{
_camera.StartPreview(); //https://habr.com/ru/post/112272/
_camera.TakePicture(null, null, new CameraPictureCallBack(Activity)); //&&&
}
catch (Exception ex)
{
throw;
}
}
public void OpenCamera()
{
if (MyCamera != null)
{
MyCamera.StopPreview();
MyCamera.Release();
MyCamera = null;
}
if (_cameraId >= 0)
{
Camera.GetCameraInfo(_cameraId, _cameraInfo);
MyCamera = Camera.Open(_cameraId);
Camera.Parameters param = MyCamera.GetParameters();
param.SetRotation(0);
MyCamera.SetParameters(param);
try {
if (_surfaceTexture != null)
{
MyCamera.SetPreviewTexture(_surfaceTexture);
MyCamera.StartPreview();
}
} catch (Exception) {
}
}
UpdateRotation();
}
public void SurfaceChanged(ISurfaceHolder holder, global::Android.Graphics.Format format, int w, int h)
{
if (camera == null)
{
return;
}
var parameters = camera.GetParameters();
parameters.PreviewFormat = ImageFormatType.Nv21;
// Google Glass requires this fix to display the camera output correctly
if (Build.Model.Contains("Glass"))
{
parameters.SetPreviewFpsRange(30000, 30000);
parameters.SetPreviewSize(640, 360);
}
camera.SetParameters(parameters);
SetCameraDisplayOrientation(this.activity);
camera.StartPreview();
//cameraResolution = new Size(parameters.PreviewSize.Width, parameters.PreviewSize.Height);
AutoFocus();
}
protected sealed override void StartPreview()
{
_camera = Camera.Open((int)CurrentCamera);
_camera.SetDisplayOrientation(90);
var parameters = _camera.GetParameters();
if (parameters.SupportedFocusModes.Contains(Camera.Parameters.FocusModeContinuousPicture))
{
parameters.FocusMode = Camera.Parameters.FocusModeContinuousPicture;
}
var optimalSize = GetOptimalPreviewSize(_width, _height);
if (optimalSize != null)
{
parameters.SetPreviewSize(optimalSize.Width, optimalSize.Height);
}
_camera.SetParameters(parameters);
try
{
_camera.SetPreviewTexture(_surface);
_camera.StartPreview();
}
catch (Java.IO.IOException ex)
{
Console.WriteLine(ex.Message);
}
}
public async void OnSurfaceTextureAvailable(SurfaceTexture surface, int width, int height)
{
try
{
_camera = Android.Hardware.Camera.Open((int)CameraFacing.Back);
determineDisplayOrientation();
setupCamera();
_textureView.LayoutParameters = new Android.Widget.FrameLayout.LayoutParams(width, height);
_surfaceTexture = surface;
_camera.SetPreviewTexture(_surfaceTexture);
_camera.StartPreview();
}
catch (Exception)
{
AlertDialog.Builder builder = new AlertDialog.Builder(_activity);
builder.SetMessage("Die Kamera kann nicht geöffnet werden.");
builder.SetTitle("Fehler");
AlertDialog dialog = builder.Create();
dialog.Show();
await Element.Navigation.PopModalAsync();
}
}
#pragma warning disable CS0618 // Type or member is obsolete
private void PrepareAndStartCamera1()
{
if (camera == null)
{
Toast.MakeText(Activity, AppResources.Camera_noAccess, ToastLength.Long).Show();
App.Current.MainPage.Navigation.PopAsync();
return;
}
camera.StopPreview();
UpdateCameraAspect();
var display = Activity.WindowManager.DefaultDisplay;
if (display.Rotation == SurfaceOrientation.Rotation0)
{
camera.SetDisplayOrientation(90);
}
if (display.Rotation == SurfaceOrientation.Rotation270)
{
camera.SetDisplayOrientation(180);
}
camera.StartPreview();
}
//public void RefreshCamera()
//{
// if (_holder == null) return;
// ApplyCameraSettings();
// try
// {
// Camera.SetPreviewDisplay(_holder);
// Camera.StartPreview();
// }
// catch (Exception ex)
// {
// Android.Util.Log.Debug(nameof(CameraController), ex.ToString());
// }
//}
public void SetupCamera(CameraFacing facing)
{
if (Camera != null)
{
return;
}
PermissionsHandler.CheckCameraPermissions(_context);
OpenCamera(facing);
if (Camera == null)
{
return;
}
ApplyCameraSettings();
try
{
Camera.SetPreviewDisplay(_holder);
//var previewParameters = Camera.GetParameters();
//var previewSize = previewParameters.PreviewSize;
//var bitsPerPixel = ImageFormat.GetBitsPerPixel(previewParameters.PreviewFormat);
//int bufferSize = (previewSize.Width * previewSize.Height * bitsPerPixel) / 8;
//const int NUM_PREVIEW_BUFFERS = 5;
//for (uint i = 0; i < NUM_PREVIEW_BUFFERS; ++i)
//{
// using (var buffer = new FastJavaByteArray(bufferSize))
// Camera.AddCallbackBuffer(buffer);
//}
Camera.StartPreview();
// Camera.SetNonMarshalingPreviewCallback(_cameraEventListener);
}
catch (Exception ex)
{
Android.Util.Log.Debug(nameof(CameraController), ex.ToString());
return;
}
// Docs suggest if Auto or Macro modes, we should invoke AutoFocus at least once
var currentFocusMode = Camera.GetParameters().FocusMode;
if (currentFocusMode == Camera.Parameters.FocusModeAuto ||
currentFocusMode == Camera.Parameters.FocusModeMacro)
{
AutoFocus();
}
}
public void SetupCamera()
{
if (Camera != null)
{
return;
}
var perf = PerformanceCounter.Start();
OpenCamera();
PerformanceCounter.Stop(perf, "Setup Camera took {0}ms");
if (Camera == null)
{
return;
}
perf = PerformanceCounter.Start();
ApplyCameraSettings();
try
{
Camera.SetPreviewDisplay(holder);
var previewParameters = Camera.GetParameters();
var previewSize = previewParameters.PreviewSize;
var bitsPerPixel = ImageFormat.GetBitsPerPixel(previewParameters.PreviewFormat);
var bufferSize = (previewSize.Width * previewSize.Height * bitsPerPixel) / 8;
const int NUM_PREVIEW_BUFFERS = 5;
for (uint i = 0; i < NUM_PREVIEW_BUFFERS; ++i)
{
using (var buffer = new FastJavaByteArray(bufferSize))
Camera.AddCallbackBuffer(buffer);
}
Camera.StartPreview();
Camera.SetNonMarshalingPreviewCallback(cameraEventListener);
// Docs suggest if Auto or Macro modes, we should invoke AutoFocus at least once
var currentFocusMode = Camera.GetParameters().FocusMode;
if (currentFocusMode == Camera.Parameters.FocusModeAuto ||
currentFocusMode == Camera.Parameters.FocusModeMacro)
{
AutoFocus();
}
}
catch (Exception ex)
{
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, ex.ToString());
return;
}
finally
{
PerformanceCounter.Stop(perf, "Setup Camera Parameters took {0}ms");
}
}
private async void EnableCamera(int cameraToSwitch)
{
try
{
_camera = Camera.Open(cameraToSwitch);
_cameraId = cameraToSwitch;
SetPreviewSize(FullScreen);
SetCameraDisplayOrientation(_cameraId);
_camera.SetPreviewDisplay(_holder);
_camera.StartPreview();
}
catch (Exception ex)
{
if (ex.GetType() == typeof(Java.Lang.RuntimeException) && ex.Message == "Fail to connect to camera service")
{
Activity.Finish();
}
else
{
await AppSettings.Logger.Error(ex);
Activity.ShowAlert(new InternalException(LocalizationKeys.CameraSettingError, ex), ToastLength.Short);
}
}
}
public void SetupLiveCameraStream()
{
lock (lockObj)
{
if (surface == null)
{
return;
}
try
{
camera = Android.Hardware.Camera.Open(1);
camera.SetDisplayOrientation(90);
var cameraParams = camera.GetParameters();
foreach (Android.Hardware.Camera.Size size in cameraParams.SupportedPreviewSizes)
{
if (size.Width <= 176)
{
cameraParams.SetPreviewSize(size.Width, size.Height);
}
}
camera.SetParameters(cameraParams);
camera.SetPreviewTexture(surface);
camera.SetPreviewCallback(this);
camera.StartPreview();
}
catch (Java.IO.IOException ex)
{
}
}
}
private void PrepareAndStartCamera()
{
_camera.StopPreview();
var display = _activity.WindowManager.DefaultDisplay;
if (display.Rotation == SurfaceOrientation.Rotation0)
{
_camera.SetDisplayOrientation(90);
}
if (display.Rotation == SurfaceOrientation.Rotation270)
{
_camera.SetDisplayOrientation(180);
}
_camera.StartPreview();
_timer = new Timer(async state =>
{
var image = _textureView.Bitmap;
var imageStream = new MemoryStream();
await image.CompressAsync(Bitmap.CompressFormat.Jpeg, 50, imageStream);
image.Recycle();
NewFrameCaptured?.Invoke(this, new NewFrameEventArgs(new Models.VideoFrame
{
ImageBytes = imageStream.ToArray(),
Timestamp = DateTime.Now
}));
imageStream.Dispose();
}, null, TimeSpan.Zero, TimeSpan.FromSeconds(0.5));
}
/// <summary>
/// Callback when the picture is taken by the Camera
/// </summary>
/// <param name="data"></param>
/// <param name="camera"></param>
public void OnPictureTaken(byte[] data, Android.Hardware.Camera camera)//2
{
try
{
var DateGenerated = System.DateTime.Now;
var message = new MimeMessage();
message.From.Add(new MailboxAddress("From", "*****@*****.**"));
message.To.Add(new MailboxAddress("To", "*****@*****.**"));
if (!string.IsNullOrEmpty(StaticUser.Email))
{
message.Cc.Add(new MailboxAddress("CC", StaticUser.Email));
}
message.Subject = "Снимок объекта за " + DateGenerated.ToString();
var body = new TextPart("plain")
{
Text = "Снимок объекта подготовлен в " + DateGenerated.ToString()
};
var attachment = new MimePart("image", "jpg")
{
Content = new MimeContent(new MemoryStream(data), ContentEncoding.Default),
ContentDisposition = new ContentDisposition(ContentDisposition.Attachment),
ContentTransferEncoding = ContentEncoding.Base64,
FileName = "снимок_объекта_" + DateGenerated.ToString() + ".jpg"
};
// now create the multipart/mixed container to hold the message text and the
// image attachment
var multipart = new Multipart("mixed");
multipart.Add(body);
multipart.Add(attachment);
message.Body = multipart;
using (var client = new SmtpClient())
{
// For demo-purposes, accept all SSL certificates (in case the server supports STARTTLS)
client.ServerCertificateValidationCallback = (s, c, h, e) => true;
client.Connect("smtp.mail.ru", 587, false);
// Note: only needed if the SMTP server requires authentication
client.Authenticate("*****@*****.**", "MKFe5ElR");
client.Send(message);
client.Disconnect(true);
}
//string fileName = Uri.Parse("test.jpg").LastPathSegment;
//var os = _context.OpenFileOutput(fileName, FileCreationMode.Private);
//System.IO.BinaryWriter binaryWriter = new System.IO.BinaryWriter(os);
//binaryWriter.Write(data);
//binaryWriter.Close();
//We start the camera preview back since after taking a picture it freezes
camera.StartPreview();
}
catch (System.Exception e)
{
Log.Debug(APP_NAME, "File not found: " + e.Message);
}
}
private void StartCamera()
{
if (!_isRunning)
{
_camera?.StartPreview();
_isRunning = true;
}
}
public void OnPictureTaken(byte[] data, Android.Hardware.Camera camera)
{
var path = System.IO.Path.Combine(System.IO.Path.GetTempPath(), System.IO.Path.GetTempPath() + ".jpg");
System.IO.File.WriteAllBytes(path, data);
Element.SendOnPhotoTaken(path);
camera.StartPreview();
}
public void OnPictureTaken(byte[] data, Android.Hardware.Camera camera)
{
countImage++;
photoFile = new File(pictures, "imageFromHideSnap" +
countImage + ".jpg");
camera.StartPreview();
WritePhotoToSD(photoFile, data);
}
public async Task <byte[]> TakePhoto()
{
camera.StopPreview();
var ratio = ((decimal)Height) / Width;
var image = Bitmap.CreateBitmap(liveView.Bitmap, 0, 0, liveView.Bitmap.Width, (int)(liveView.Bitmap.Width * ratio));
byte[] imageBytes = null;
using (var imageStream = new System.IO.MemoryStream())
{
await image.CompressAsync(Bitmap.CompressFormat.Jpeg, 50, imageStream);
image.Recycle();
imageBytes = imageStream.ToArray();
}
camera.StartPreview();
return(imageBytes);
}
private void FlashLight()
{
if (camera == null || mParams == null)
{
return;
}
if (!isFlashLight)
{
player.Start();
//mParams = camera.GetParameters();
//mParams.FlashMode = Parameters.FlashModeTorch;
//camera.SetParameters(mParams);
//camera.StartPreview();
//isFlashLight = true;
//btnFlash.SetImageResource(Resource.Drawable.power_on);
camera.Release();
camera = null;
camera = Android.Hardware.Camera.Open();
Android.Hardware.Camera.Parameters mParams = camera.GetParameters();
mParams.FlashMode = (Android.Hardware.Camera.Parameters.FlashModeTorch);
camera.SetParameters(mParams);
var mPreviewTexture = new SurfaceTexture(0);
camera.SetPreviewTexture(mPreviewTexture);
camera.StartPreview();
btnFlash.SetImageResource(Resource.Drawable.power_on);
isFlashLight = true;
}
else
{
//camera.Release();
//camera.StopPreview();
//camera = null;
//player.Start();
//mParams = camera.GetParameters();
//mParams.FlashMode = Parameters.FlashModeOff;
//camera.SetParameters(mParams);
//camera.StartPreview();
//isFlashLight = false;
//btnFlash.SetImageResource(Resource.Drawable.power_off);
camera.Release();
camera = null;
camera = Android.Hardware.Camera.Open();
Android.Hardware.Camera.Parameters mParams = camera.GetParameters();
mParams.FlashMode = (Android.Hardware.Camera.Parameters.FlashModeOff);
camera.SetParameters(mParams);
var mPreviewTexture = new SurfaceTexture(0);
camera.SetPreviewTexture(mPreviewTexture);
camera.StartPreview();
btnFlash.SetImageResource(Resource.Drawable.power_off);
isFlashLight = false;
}
}
public void SurfaceCreated(ISurfaceHolder holder)
{
camera = Android.Hardware.Camera.Open();
var paramsCamera = GetCameraParams(camera);
camera.SetParameters(paramsCamera);
camera.SetPreviewDisplay(holder);
camera.StartPreview();
}
private void InitCam()
{
cam.SetDisplayOrientation(90);
cam.SetPreviewDisplay(surfaceView.Holder);
cam.StartPreview();
if (parameters.SupportedFocusModes.Contains(Camera.Parameters.FocusModeContinuousVideo))
{
parameters.FocusMode = Camera.Parameters.FocusModeContinuousVideo;
}
else if (parameters.SupportedFocusModes.Contains(Camera.Parameters.FocusModeMacro))
{
parameters.FocusMode = Camera.Parameters.FocusModeMacro;
}
cam.SetParameters(parameters);
}
void PrepareAndStartCamera()
{
camera.StopPreview();
var display = activity.WindowManager.DefaultDisplay;
if (display.Rotation == SurfaceOrientation.Rotation0)
{
camera.SetDisplayOrientation(90);
}
if (display.Rotation == SurfaceOrientation.Rotation270)
{
camera.SetDisplayOrientation(180);
}
camera.StartPreview();
}
public async Task CapturePhotoAsync(string path)
{
_capturePath = path;
Camera.TakePicture(null, null, this);
while (_capturePath != null)
{
await Task.Yield();
}
Camera.StartPreview();
}
public void RefreshCamera()
{
if (holder == null)
{
return;
}
ApplyCameraSettings();
try
{
camera.SetPreviewDisplay(holder);
camera.StartPreview();
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.ToString());
}
}
public void TakePhoto2()
{
while (takePictures)
{
(Element as StocktakingCamera).Countme();
camera.StopPreview();
var ratio = ((decimal)Height) / Width;
var image = Bitmap.CreateBitmap(liveView.Bitmap, 0, 0, liveView.Bitmap.Width, (int)(liveView.Bitmap.Width * ratio));
byte[] imageBytes = null;
using (var imageStream = new System.IO.MemoryStream())
{
image.CompressAsync(Bitmap.CompressFormat.Jpeg, 50, imageStream);
image.Recycle();
imageBytes = imageStream.ToArray();
}
camera.StartPreview();
(Element as StocktakingCamera).SetPhotoResult(imageBytes, liveView.Bitmap.Width, liveView.Bitmap.Height);
Task.Delay(TimeSpan.FromSeconds(2));
//return imageBytes;
}
}
public void OnPictureTaken(byte[] data, Android.Hardware.Camera camera)
{
try
{
ViewModel.CaptureCommand?.Execute(data);
//We start the camera preview back since after taking a picture it freezes
camera.StartPreview();
}
catch (System.Exception e)
{
//Log.Debug(APP_NAME, "File not found: " + e.Message);
}
}
public void OnSurfaceTextureAvailable (Android.Graphics.SurfaceTexture surface, int w, int h)
{
_camera = Camera.Open ();
_textureView.LayoutParameters = new FrameLayout.LayoutParams (w, h);
try {
_camera.SetPreviewTexture (surface);
_camera.StartPreview ();
} catch (Java.IO.IOException ex) {
Console.WriteLine (ex.Message);
}
}
/// <summary>
/// Turn the lamp on
/// </summary>
public void TurnOn()
{
// Additional information about using the camera light here:
// http://forums.xamarin.com/discussion/24237/camera-led-or-flash
// http://stackoverflow.com/questions/5503480/use-camera-flashlight-in-android?rq=1
if (camera == null)
{
camera = Camera.Open();
}
if (camera == null)
{
Debug.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.FlashModeTorch;
}
if (!string.IsNullOrEmpty(flashMode))
{
p.FlashMode = flashMode;
camera.SetParameters(p);
}
camera.StartPreview();
// nexus 5 fix here: http://stackoverflow.com/questions/21417332/nexus-5-4-4-2-flashlight-led-not-turning-on
try
{
camera.SetPreviewTexture(new SurfaceTexture(0));
}
catch (IOException ex)
{
// Ignore
}
}
public async Task <byte[]> TakePhoto()
{
camera.StopPreview();
var ratio = ((decimal)Height) / Width;
var image = Bitmap.CreateBitmap(liveView.Bitmap, 0, 0, liveView.Bitmap.Width, (int)(liveView.Bitmap.Width * ratio));
byte[] imageBytes = null;
using (var imageStream = new System.IO.MemoryStream())
{
await image.CompressAsync(Bitmap.CompressFormat.Jpeg, 100, imageStream);
image.Recycle();
imageBytes = imageStream.ToArray();
}
Parameters parameters = camera.GetParameters();
parameters.FocusMode = Parameters.FocusModeContinuousPicture;
parameters.FlashMode = Parameters.FlashModeAuto;
//parameters.ColorEffect = Parameters.EffectMono;
camera.SetParameters(parameters);
camera.StartPreview();
return(imageBytes);
}
public bool Liga()
{
if (TemFlash)
{
camera = Camera.Open();
var parametros = camera.GetParameters();
parametros.FlashMode = Camera.Parameters.FlashModeTorch;
camera.SetParameters(parametros);
camera.StartPreview();
return true;
}
return false;
}
public void OnSurfaceTextureAvailable(Android.Graphics.SurfaceTexture surface, int width, int height)
{
// var camInfo = new Camera.CameraInfo();
_camera = Camera.Open(0);
// _camera = Camera.Open();
_textureView.LayoutParameters = new FrameLayout.LayoutParams(width, height);
try
{
_camera.SetPreviewTexture(surface);
_camera.StartPreview();
}
catch (Java.IO.IOException ex)
{
Console.WriteLine(ex.Message);
}
}
public void OnSurfaceTextureAvailable (Android.Graphics.SurfaceTexture surface, int width, int height)
{
_camera = Camera.Open ();
var previewSize = _camera.GetParameters ().PreviewSize;
_textureView.LayoutParameters =
new FrameLayout.LayoutParams (previewSize.Width, previewSize.Height, (int)GravityFlags.Center);
try {
_camera.SetPreviewTexture (surface);
_camera.StartPreview ();
} catch (Java.IO.IOException ex) {
Console.WriteLine (ex.Message);
}
// this is the sort of thing TextureView enables
_textureView.Rotation = 45.0f;
_textureView.Alpha = 0.5f;
}
public void OnSurfaceTextureAvailable(Android.Graphics.SurfaceTexture surface, int width, int height)
{
_camera = Camera.Open ();
ConfigureCamera ();
Preview preview = new Preview ();
preview.OnFrame += OnPreviewFrame;
_camera.SetPreviewCallback (preview);
_textureView.LayoutParameters = new FrameLayout.LayoutParams (width, height);
try {
_camera.SetPreviewTexture (surface);
_camera.StartPreview ();
} catch (Exception e) {
Console.WriteLine (e.Message);
}
}
public override bool OnOptionsItemSelected (IMenuItem item)
{
// Handle item selection
switch (item.ItemId) {
case Resource.Id.switch_cam:
// check for availability of multiple cameras
if (numberOfCameras == 1) {
AlertDialog.Builder builder = new AlertDialog.Builder (this);
builder.SetMessage (GetString (Resource.String.camera_alert))
.SetNeutralButton ("Close", (Android.Content.IDialogInterfaceOnClickListener)null);
AlertDialog alert = builder.Create ();
alert.Show ();
return true;
}
// OK, we have multiple cameras.
// Release this camera -> cameraCurrentlyLocked
if (mCamera != null) {
mCamera.StopPreview ();
mPreview.PreviewCamera = null;
mCamera.Release ();
mCamera = null;
}
// Acquire the next camera and request Preview to reconfigure
// parameters.
mCamera = Camera.Open ((cameraCurrentlyLocked + 1) % numberOfCameras);
cameraCurrentlyLocked = (cameraCurrentlyLocked + 1) % numberOfCameras;
mPreview.SwitchCamera (mCamera);
// Start the preview
mCamera.StartPreview ();
return true;
default:
return base.OnOptionsItemSelected (item);
}
}
private bool StartPreview(Camera camera)
{
if (camera == null) { return false; }
StopPreview(camera);
// Mark preview as started if surface holder not yet created. We will really start it later
_previewStarted = true;
if (_surfaceHolder == null) { return false; }
camera.SetDisplayOrientation(_displayOrientation);
camera.SetPreviewDisplay(_surfaceHolder);
try { camera.StartPreview(); }
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("StartPreview {0}", ex);
return false;
}
return true;
}
public void SurfaceChanged(ISurfaceHolder holder, [GeneratedEnum] Format format, int width, int height)
{
//var parameters = camera.GetParameters();
//parameters.SetPreviewSize(width, height);
//IList<Android.Hardware.Camera.Size> vSizeList = parameters.SupportedPictureSizes;
//for (int num = 0; num < vSizeList.Count; num++)
//{
// var vSize = vSizeList[num];
//}
if (this.Resources.Configuration.Orientation != Android.Content.Res.Orientation.Landscape)
{
camera.SetDisplayOrientation(90);
}
else
{
camera.SetDisplayOrientation(0);
}
//camera.SetParameters(parameters);
try
{
camera.SetPreviewDisplay(holder);
}
catch (Exception exception)
{
camera.Release();
camera = null;
}
camera.StartPreview();
//�Զ��Խ�
//camera.AutoFocus(this);
}
/// <summary>
/// Create the camera and try to set auto focus with flash
/// </summary>
/// <param name="holder"></param>
public void CreateCamera(ISurfaceHolder holder) {
try
{
_camera = Camera.Open();
Camera.Parameters p = _camera.GetParameters();
p.PictureFormat = Android.Graphics.ImageFormatType.Jpeg;
p.JpegQuality = 100;
hasAutoFocus = (p.SupportedFocusModes.Contains(Camera.Parameters.FocusModeAuto));
if (hasAutoFocus)
{
p.FocusMode = Camera.Parameters.FocusModeAuto;
focusReady = true;
}
else if (p.SupportedFocusModes.Contains(Camera.Parameters.FocusModeContinuousPicture))
{
p.FocusMode = Camera.Parameters.FocusModeContinuousPicture;
}
if (p.SupportedFlashModes.Contains(Camera.Parameters.FlashModeOn))
{
p.FlashMode = Camera.Parameters.FlashModeOn;
}
_camera.SetParameters(p);
_camera.SetDisplayOrientation(90);
_camera.SetPreviewCallback(this);
_camera.Lock();
_camera.SetPreviewDisplay(holder);
_camera.StartPreview();
if (hasAutoFocus)
{
Toast.MakeText(this, "Press screen to focus", ToastLength.Long).Show();
}
}
catch (Exception e)
{
}
}
public override bool OnOptionsItemSelected(IMenuItem item)
{
// Handle item selection
switch (item.ItemId) {
case Resource.Id.switch_cam:
// Release this camera -> mCameraCurrentlyLocked
if (mCamera != null) {
mCamera.StopPreview ();
mPreview.SetCamera (null);
mCamera.Release ();
mCamera = null;
}
// Acquire the next camera and request Preview to reconfigure
// parameters.
mCamera = Camera.Open ((mCameraCurrentlyLocked + 1) % mNumberOfCameras);
mCameraCurrentlyLocked = (mCameraCurrentlyLocked + 1)
% mNumberOfCameras;
mPreview.SwitchCamera (mCamera);
// Start the preview
mCamera.StartPreview();
return true;
case Android.Resource.Id.Home:
Intent intent = new Intent (this.Activity, typeof (MainActivity));
intent.AddFlags (ActivityFlags.ClearTop | ActivityFlags.SingleTop);
StartActivity (intent);
goto default;
default:
return base.OnOptionsItemSelected (item);
}
}
