Java CameraSource類代碼示例

import com.google.android.gms.vision.CameraSource; //導入依賴的package包/類
/**
 * Create face decoder and camera source.
 */
private void creteCameraTracker() {
    mDetector = new FaceDetector.Builder(mActivity)
            .setTrackingEnabled(false)
            .setClassificationType(FaceDetector.ALL_CLASSIFICATIONS)
            .build();

    mDetector.setProcessor(
            new MultiProcessor.Builder<>(new GraphicFaceTrackerFactory())
                    .build());

    if (!mDetector.isOperational()) {
        mUserAwareVideoView.onErrorOccurred();
        Log.e("Start Tracking", "Face tracker is not operational.");
    }

    mCameraSource = new CameraSource.Builder(mActivity, mDetector)
            .setRequestedPreviewSize(640, 480)
            .setFacing(CameraSource.CAMERA_FACING_FRONT)
            .setRequestedFps(30.0f)
            .build();
}
 

import com.google.android.gms.vision.CameraSource; //導入依賴的package包/類
@Override
public boolean onTouchEvent(MotionEvent event) {
    if (event.getAction() == MotionEvent.ACTION_DOWN) {
        Log.d("onTouch", "OnTouch");
        cameraSource.takePicture(new CameraSource.ShutterCallback() {
            @Override
            public void onShutter() {

            }
        }, new CameraSource.PictureCallback() {

            @Override
            public void onPictureTaken(byte[] bytes) {

            }
        });
    }

    return false;
}
 

import com.google.android.gms.vision.CameraSource; //導入依賴的package包/類
private void createCameraSource() {
  Context context = getApplicationContext();
  FaceDetector detector = createFaceDetector(context);

  detector.setProcessor(new MultiProcessor.Builder<>(new GraphicFaceTrackerFactory()).build());

  if (!detector.isOperational()) {
    Timber.d("Face detector dependencies are not yet available.");
  }

  cameraSource = new CameraSource.Builder(context, detector) //
      // Camera will decide actual size, and we'll crop accordingly in layout.
      .setRequestedPreviewSize(640, 480)
      .setFacing(CameraSource.CAMERA_FACING_FRONT)
      .setRequestedFps(MAX_FRAME_RATE)
      .setAutoFocusEnabled(true)
      .build();
}
 

import com.google.android.gms.vision.CameraSource; //導入依賴的package包/類
@RequiresPermission(Manifest.permission.CAMERA)
public void start(CameraSource cameraSource) throws IOException, SecurityException {
    if (cameraSource == null) {
        stop();
    }

    mCameraSource = cameraSource;

    if (mCameraSource != null) {
        mStartRequested = true;
        startIfReady();
        requestLayout();
        invalidate();
    }

}
 

import com.google.android.gms.vision.CameraSource; //導入依賴的package包/類
private void startCameraView(Context context, CameraSource cameraSource,
    SurfaceView surfaceView) {
  if (cameraRunning) {
    throw new IllegalStateException("Camera already started!");
  }
  try {
    if (ActivityCompat.checkSelfPermission(context, Manifest.permission.CAMERA)
        != PackageManager.PERMISSION_GRANTED) {
      Log.e(LOGTAG, "Permission not granted!");
    }
    else if (!cameraRunning && cameraSource != null && surfaceView != null) {
      cameraSource.start(surfaceView.getHolder());
      cameraRunning = true;
    }
  } catch (IOException ie) {
    Log.e(LOGTAG, ie.getMessage());
    ie.printStackTrace();
  }
}
 

import com.google.android.gms.vision.CameraSource; //導入依賴的package包/類
private void takeShot() {
    mCameraSource.takePicture(null, new CameraSource.PictureCallback() {
        @Override
        public void onPictureTaken(byte[] bytes) {
            mPreview.stop();
            File shot = null;
            try {
                shot = FileUtils.saveImage(bytes, "jpg");
            } catch (IOException e) {
                e.printStackTrace();
                return;
            }
            Intent shareIntent = new Intent(Intent.ACTION_SEND);
            shareIntent.setType("image/jpeg");
            shareIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(shot));
            startActivity(Intent.createChooser(shareIntent, ""));
        }
    });
}
 

import com.google.android.gms.vision.CameraSource; //導入依賴的package包/類
/**
 * Creates the face detector and the camera.
 */
private void createCameraSource() {
    Context context = getApplicationContext();
    FaceDetector detector = createFaceDetector(context);

    int facing = CameraSource.CAMERA_FACING_FRONT;
    if (!mIsFrontFacing) {
        facing = CameraSource.CAMERA_FACING_BACK;
    }

    // The camera source is initialized to use either the front or rear facing camera.  We use a
    // relatively low resolution for the camera preview, since this is sufficient for this app
    // and the face detector will run faster at lower camera resolutions.
    //
    // However, note that there is a speed/accuracy trade-off with respect to choosing the
    // camera resolution.  The face detector will run faster with lower camera resolutions,
    // but may miss smaller faces, landmarks, or may not correctly detect eyes open/closed in
    // comparison to using higher camera resolutions.  If you have any of these issues, you may
    // want to increase the resolution.
    mCameraSource = new CameraSource.Builder(context, detector)
            .setFacing(facing)
            .setRequestedPreviewSize(320, 240)
            .setRequestedFps(60.0f)
            .setAutoFocusEnabled(true)
            .build();
}
 

import com.google.android.gms.vision.CameraSource; //導入依賴的package包/類
private void takePhotoAndGoToNextActivity() {
    mCameraSource.takePicture(null, new CameraSource.PictureCallback() {
        @Override
        public void onPictureTaken(byte[] bytes) {
            faceAndPoemService.setFace(mFace);
            if (faceAndPoemService.doesFaceHaveTwoEyes()) {
                Bitmap bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
                faceAndPoemService.setFacePicture(bitmap);
                Intent intent = new Intent(FaceCaptureActivity.this, FindGesichtGedichtActivity.class);
                startActivity(intent);
            } else {
                Toast.makeText(FaceCaptureActivity.this, "both eyes need to be visible", Toast.LENGTH_SHORT).show();
            }
        }
    });
}
 

import com.google.android.gms.vision.CameraSource; //導入依賴的package包/類
/**
 * Adjusts the x coordinate from the preview's coordinate system to the view coordinate
 * system.
 */
public float translateX(float x) {
    if (mOverlay.mFacing == CameraSource.CAMERA_FACING_FRONT) {
        return mOverlay.getWidth() - scaleX(x);
    } else {
        return scaleX(x);
    }
}
 

import com.google.android.gms.vision.CameraSource; //導入依賴的package包/類
public void start(CameraSource cameraSource) throws IOException {
    if (cameraSource == null) {
        stop();
    }

    mCameraSource = cameraSource;

    if (mCameraSource != null) {
        mStartRequested = true;
        startIfReady();
    }
}
 

import com.google.android.gms.vision.CameraSource; //導入依賴的package包/類
/**
 * Creates and starts the camera.  Note that this uses a higher resolution in comparison
 * to other detection examples to enable the barcode detector to detect small barcodes
 * at long distances.
 */
private void createCameraSource() {

    Context context = getApplicationContext();
    FaceDetector detector = new FaceDetector.Builder(context)
            .setClassificationType(FaceDetector.ALL_CLASSIFICATIONS)
            .setLandmarkType(FaceDetector.ALL_LANDMARKS)
            .setMode(FaceDetector.ACCURATE_MODE)
            .build();

    detector.setProcessor(
            new MultiProcessor.Builder<>(new GraphicFaceTrackerFactory())
                    .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.
        Log.w(TAG, "Face detector dependencies are not yet available.");
    }

    mCameraSource = new CameraSource.Builder(context, detector)
            .setRequestedPreviewSize(640, 480)
            .setFacing(CameraSource.CAMERA_FACING_FRONT)
            .setRequestedFps(30.0f)
            .build();
}
 

import com.google.android.gms.vision.CameraSource; //導入依賴的package包/類
/**
 * Adjusts the x coordinate from the preview's coordinate system to the view coordinate
 * system.
 */
public float translateX(float x) {
    if (GraphicOverlay.sFacing == CameraSource.CAMERA_FACING_FRONT) {
        return getWidth() - scaleX(x);
    } else {
        return scaleX(x);
    }
}
 

import com.google.android.gms.vision.CameraSource; //導入依賴的package包/類
public void start(CameraSource cameraSource, GraphicOverlay overlay, float requiredRatio) {
  this.requiredRatio = requiredRatio;
  this.overlay = overlay;
  this.cameraSource = cameraSource;
  startRequested = true;
  startIfReady();
}
 

import com.google.android.gms.vision.CameraSource; //導入依賴的package包/類
@Override public float translateX(float x) {
  if (facing == CameraSource.CAMERA_FACING_FRONT) {
    return getWidth() - scaleHorizontal(x);
  } else {
    return scaleHorizontal(x);
  }
}
 

import com.google.android.gms.vision.CameraSource; //導入依賴的package包/類
/**
 * Creates and starts the camera.  Note that this uses a higher resolution in comparison
 * to other detection examples to enable the barcode detector to detect small barcodes
 * at long distances.
 */
private void createCameraSource() {

    Context context = getApplicationContext();
    FaceDetector detector = new FaceDetector.Builder(context)
            .setClassificationType(FaceDetector.ALL_CLASSIFICATIONS)
            .build();

    detector.setProcessor(
            new MultiProcessor.Builder<>(new GraphicFaceTrackerFactory())
                    .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.
        Log.w(TAG, "Face detector dependencies are not yet available.");
    }

    mCameraSource = new CameraSource.Builder(context, detector)
            .setRequestedPreviewSize(640, 480)
            .setFacing(CameraSource.CAMERA_FACING_BACK)
            .setRequestedFps(30.0f)
            .build();
}