protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
SetContentView(Resource.Layout.FaceTracker);
mPreview = FindViewById <CameraSourcePreview> (Resource.Id.preview);
mGraphicOverlay = FindViewById <GraphicOverlay> (Resource.Id.faceOverlay);
var detector = new Android.Gms.Vision.Faces.FaceDetector.Builder(Application.Context).Build();
detector.SetProcessor(
new Android.Gms.Vision.MultiProcessor.Builder(new GraphicFaceTrackerFactory(mGraphicOverlay)).Build());
if (!detector.IsOperational)
{
// Note: The first time that an app using face API is installed on a device, GMS will
// download a native library to the device in order to do detection. Usually this
// completes before the app is run for the first time. But if that download has not yet
// completed, then the above call will not detect any faces.
//
// isOperational() can be used to check if the required native library is currently
// available. The detector will automatically become operational once the library
// download completes on device.
Android.Util.Log.Warn(TAG, "Face detector dependencies are not yet available.");
}
mCameraSource = new Android.Gms.Vision.CameraSource.Builder(Application.Context, detector)
.SetRequestedPreviewSize(640, 480)
.SetFacing(Android.Gms.Vision.CameraFacing.Back)
.SetRequestedFps(30.0f)
.Build();
}
public FaceGraphic(GraphicOverlay overlay) : base(overlay)
{
mCurrentColorIndex = (mCurrentColorIndex + 1) % COLOR_CHOICES.Length;
var selectedColor = COLOR_CHOICES[mCurrentColorIndex];
mFacePositionPaint = new Paint();
mFacePositionPaint.Color = selectedColor;
mIdPaint = new Paint();
mIdPaint.Color = selectedColor;
mIdPaint.TextSize = ID_TEXT_SIZE;
mBoxPaint = new Paint();
mBoxPaint.Color = selectedColor;
mBoxPaint.SetStyle(Paint.Style.Stroke);
mBoxPaint.StrokeWidth = BOX_STROKE_WIDTH;
}
public GraphicFaceTracker(GraphicOverlay overlay)
{
mOverlay = overlay;
mFaceGraphic = new FaceGraphic(overlay);
}
public GraphicFaceTrackerFactory(GraphicOverlay overlay) : base()
{
Overlay = overlay;
}
public GraphicBarcodeTracker(GraphicOverlay overlay)
{
mOverlay = overlay;
mBarcodeGraphic = new BarcodeGraphic(overlay);
}
public void Start(CameraSource cameraSource, GraphicOverlay overlay)
{
mOverlay = overlay;
Start(cameraSource);
}
public Graphic(GraphicOverlay overlay)
{
mOverlay = overlay;
}
