private void SetupAndStartCamera(SurfaceTexture surface = null) { try { if (_isSurfaceAvailable) { if (_camera == null) { _camera = Camera.Open((int)_cameraType); _camera.SetErrorCallback(this); for (var ii = 0; ii < Camera.NumberOfCameras - 1; ii++) { var info = new Camera.CameraInfo(); Camera.GetCameraInfo(ii, info); if (info.CanDisableShutterSound) { _camera.EnableShutterSound(false); } } var parameters = _camera.GetParameters(); parameters.FlashMode = Camera.Parameters.FlashModeOff; parameters.VideoStabilization = false; parameters.JpegQuality = 100; TurnOnContinuousFocus(parameters); var landscapePictureDescendingSizes = parameters .SupportedPictureSizes .Where(p => p.Width > p.Height) .OrderByDescending(p => p.Width * p.Height) .ToList(); var landscapePreviewDescendingSizes = parameters .SupportedPreviewSizes .Where(p => p.Width > p.Height) .OrderByDescending(p => p.Width * p.Height) .ToList(); foreach (var pictureSize in landscapePictureDescendingSizes) { foreach (var previewSize in landscapePreviewDescendingSizes) { if (Math.Abs((double)pictureSize.Width / pictureSize.Height - (double)previewSize.Width / previewSize.Height) < 0.0001) { _pictureSize = pictureSize; _previewSize = previewSize; break; } } if (_pictureSize != null) { break; } } if (_pictureSize == null || _previewSize == null) { _pictureSize = landscapePictureDescendingSizes.First(); _previewSize = landscapePreviewDescendingSizes.First(); } parameters.SetPictureSize(_pictureSize.Width, _pictureSize.Height); parameters.SetPreviewSize(_previewSize.Width, _previewSize.Height); _camera.SetParameters(parameters); _camera.SetPreviewTexture(_surfaceTexture); } if (surface != null) { _surfaceTexture = surface; } SetOrientation(); StartCamera(); } } catch (Exception e) { _cameraModule.ErrorMessage = e.ToString(); } }