void ToggleFlashButtonTapped(object sender, EventArgs e)
{
flashOn = !flashOn;
if (flashOn)
{
if (cameraType == CameraFacing.Back)
{
toggleFlashButton.SetBackgroundResource(Resource.Drawable.FlashButton);
cameraType = CameraFacing.Back;
camera.StopPreview();
camera.Release();
camera = global::Android.Hardware.Camera.Open((int)cameraType);
var parameters = camera.GetParameters();
parameters.FlashMode = global::Android.Hardware.Camera.Parameters.FlashModeTorch;
camera.SetParameters(parameters);
camera.SetPreviewTexture(surfaceTexture);
PrepareAndStartCamera();
}
}
else
{
toggleFlashButton.SetBackgroundResource(Resource.Drawable.NoFlashButton);
camera.StopPreview();
camera.Release();
camera = global::Android.Hardware.Camera.Open((int)cameraType);
var parameters = camera.GetParameters();
parameters.FlashMode = global::Android.Hardware.Camera.Parameters.FlashModeOff;
camera.SetParameters(parameters);
camera.SetPreviewTexture(surfaceTexture);
PrepareAndStartCamera();
}
}
public void OpenCamera(global::Android.Hardware.Camera camera)
{
_camera = camera;
var cameraParams = _camera.GetParameters();
if (Resources.Configuration.Orientation != global::Android.Content.Res.Orientation.Landscape)
{
cameraParams.Set("orientation", "portrait");
_camera.SetDisplayOrientation(90);
cameraParams.SetRotation(90);
}
else
{
cameraParams.Set("orientation", "landscape");
_camera.SetDisplayOrientation(0);
cameraParams.SetRotation(0);
}
var bestPictureSize = GetWorstPictureSize(cameraParams);
if (bestPictureSize != default(Size))
{
cameraParams.SetPictureSize(bestPictureSize.Width, bestPictureSize.Height);
}
_camera.SetParameters(cameraParams);
if (_shouldInitializeCamera)
{
_camera.SetPreviewDisplay(Holder);
_camera.StartPreview();
_shouldInitializeCamera = false;
}
}
void ToggleFlashButtonTapped(object sender, EventArgs e)
{
flashOn = !flashOn;
if (flashOn)
{
if (cameraType == CameraFacing.Back)
{
toggleFlashButton.SetBackgroundResource(Resource.Drawable.FlashButton);
cameraType = CameraFacing.Back;
camera.StopPreview();
camera.Release();
camera = global::Android.Hardware.Camera.Open((int)cameraType);
var parameters = camera.GetParameters();
parameters.FlashMode = global::Android.Hardware.Camera.Parameters.FlashModeTorch;
camera.SetParameters(parameters);
camera.SetPreviewTexture(surfaceTexture);
PrepareAndStartCamera();
}
}
else
{
toggleFlashButton.SetBackgroundResource(Resource.Drawable.NoFlashButton);
camera.StopPreview();
camera.Release();
camera = global::Android.Hardware.Camera.Open((int)cameraType);
var infoFocusCalibration = global::Android.Hardware.Camera2.CameraCharacteristics.LensInfoFocusDistanceCalibration;
var infoSupportHardLevel = global::Android.Hardware.Camera2.CameraCharacteristics.InfoSupportedHardwareLevel;
var infoMinimumFocus = global::Android.Hardware.Camera2.CameraCharacteristics.LensPoseRotation;
var infoSensorActiveArraySize = global::Android.Hardware.Camera2.CameraCharacteristics.SensorInfoActiveArraySize;
//var paramters2 = camera2.
var parameters = camera.GetParameters();
parameters.FlashMode = global::Android.Hardware.Camera.Parameters.FlashModeOff;
parameters.FocusMode = global::Android.Hardware.Camera.Parameters.FocusModeAuto;
camera.SetParameters(parameters);
camera.SetPreviewTexture(surfaceTexture);
camera.SetDisplayOrientation(100);
var max = camera.GetParameters().MaxNumFocusAreas;
PrepareAndStartCamera();
camera.StartFaceDetection();
}
}
private void ToggleFlashButtonTapped(object sender, EventArgs e)
{
_flashOn = !_flashOn;
if (_flashOn)
{
if (cameraType == CameraFacing.Back)
{
toggleFlashButton.SetBackgroundResource(Resource.Drawable.FlashButton);
cameraType = CameraFacing.Back;
camera.StopPreview();
camera.Release();
camera = global::Android.Hardware.Camera.Open((int)cameraType);
var parameters = camera.GetParameters();
parameters.FlashMode = global::Android.Hardware.Camera.Parameters.FlashModeTorch;
camera.SetParameters(parameters);
camera.SetPreviewTexture(surfaceTexture);
PrepareAndStartCamera();
}
}
else
{
toggleFlashButton.SetBackgroundResource(Resource.Drawable.NoFlashButton);
camera.StopPreview();
camera.Release();
camera = global::Android.Hardware.Camera.Open((int)cameraType);
var parameters = camera.GetParameters();
parameters.FlashMode = global::Android.Hardware.Camera.Parameters.FlashModeOff;
camera.SetParameters(parameters);
camera.SetPreviewTexture(surfaceTexture);
PrepareAndStartCamera();
}
}
private async void TakePhotoButtonTapped(object sender, EventArgs e)
{
var current = CrossConnectivity.Current.IsConnected;
// check the internet connection to use the ResDiary API
if (!current)
{
await App.Current.MainPage.DisplayAlert("Connection Error", "Please connect to the internet", "OK");
}
else
{
try
{
var parameters = camera.GetParameters();
parameters.FlashMode = global::Android.Hardware.Camera.Parameters.FlashModeOff;
camera.SetParameters(parameters);
camera.StopPreview();
DialogService.ShowLoading("Scanning Logo");
// crop the image into the sqaure in order to make the prediction more accuracy
var image = CropImage(textureView.Bitmap);
using (var imageStream = new MemoryStream())
{
await image.CompressAsync(Bitmap.CompressFormat.Jpeg, 50, imageStream);
image.Recycle();
imageBytes = imageStream.ToArray();
}
// send the image to CustomVision in form of bytes
var results = await CustomVisionService.PredictImageContentsAsync(imageBytes);
String resultInString = results.ToString();
if (resultInString.Length > 0)
{
// if the logo appeared more than 1 result than use the Geolocation
if (Geolocation.HasMoreOptions(resultInString))
{
DialogService.ShowLoading("More Restaurants Available");
resultInString = await Geolocation.GetCloserOptionAsync(resultInString);
}
var navigationPage = new NavigationPage(new RestaurantPage(resultInString));
DialogService.HideLoading();
camera.StartPreview();
await App.Current.MainPage.Navigation.PushModalAsync(navigationPage, true);
}
else
{
DialogService.HideLoading();
camera.StartPreview();
await App.Current.MainPage.DisplayAlert("Restaurant Not Found", "Please re-scan the Logo", "OK");
}
}
catch (Exception)
{
camera.StopPreview();
camera.Release();
camera = global::Android.Hardware.Camera.Open((int)cameraType);
camera.SetPreviewTexture(surfaceTexture);
PrepareAndStartCamera();
}
}
}