Java Size類代碼示例

import android.util.Size; //導入依賴的package包/類
/**
 * Initialize HeifReader module.
 *
 * @param context Context.
 */
public static void initialize(Context context) {
    mRenderScript = RenderScript.create(context);
    mCacheDir = context.getCacheDir();

    // find best HEVC decoder
    mDecoderName = null;
    mDecoderSupportedSize = new Size(0, 0);
    int numCodecs = MediaCodecList.getCodecCount();
    for (int i = 0; i < numCodecs; i++) {
        MediaCodecInfo codecInfo = MediaCodecList.getCodecInfoAt(i);
        if (codecInfo.isEncoder()) {
            continue;
        }
        for (String type : codecInfo.getSupportedTypes()) {
            if (type.equalsIgnoreCase(MediaFormat.MIMETYPE_VIDEO_HEVC)) {
                MediaCodecInfo.CodecCapabilities cap = codecInfo.getCapabilitiesForType(MediaFormat.MIMETYPE_VIDEO_HEVC);
                MediaCodecInfo.VideoCapabilities vcap = cap.getVideoCapabilities();
                Size supportedSize = new Size(vcap.getSupportedWidths().getUpper(), vcap.getSupportedHeights().getUpper());
                Log.d(TAG, "HEVC decoder=\"" + codecInfo.getName() + "\""
                        + " supported-size=" + supportedSize
                        + " color-formats=" + Arrays.toString(cap.colorFormats)
                );
                if (mDecoderSupportedSize.getWidth() * mDecoderSupportedSize.getHeight() < supportedSize.getWidth() * supportedSize.getHeight()) {
                    mDecoderName = codecInfo.getName();
                    mDecoderSupportedSize = supportedSize;
                }
            }
        }
    }
    if (mDecoderName == null) {
        throw new RuntimeException("no HEVC decoding support");
    }
    Log.i(TAG, "HEVC decoder=\"" + mDecoderName + "\" supported-size=" + mDecoderSupportedSize);
}
 

import android.util.Size; //導入依賴的package包/類
protected void setFragment() {
  final Fragment fragment =
      CameraConnectionFragment.newInstance(
          new CameraConnectionFragment.ConnectionCallback() {
            @Override
            public void onPreviewSizeChosen(final Size size, final int rotation) {
              CameraActivity.this.onPreviewSizeChosen(size, rotation);
            }
          },
          this,
          getLayoutId(),
          getDesiredPreviewFrameSize());

  getFragmentManager()
      .beginTransaction()
      .replace(R.id.container, fragment)
      .commit();
}
 

import android.util.Size; //導入依賴的package包/類
/**
 * Given {@code choices} of {@code Size}s supported by a camera, chooses the smallest one whose
 * width and height are at least as large as the respective requested values, and whose aspect
 * ratio matches with the specified value.
 *
 * @param choices     The list of sizes that the camera supports for the intended output class
 * @param width       The minimum desired width
 * @param height      The minimum desired height
 * @param aspectRatio The aspect ratio
 * @return The optimal {@code Size}, or an arbitrary one if none were big enough
 */
private static Size chooseOptimalSize(Size[] choices, int width, int height, Size aspectRatio) {
    // Collect the supported resolutions that are at least as big as the preview Surface
    List<Size> bigEnough = new ArrayList<Size>();
    int w = aspectRatio.getWidth();
    int h = aspectRatio.getHeight();
    for (Size option : choices) {
        if (option.getHeight() == option.getWidth() * h / w &&
                option.getWidth() >= width && option.getHeight() >= height) {
            bigEnough.add(option);
        }
    }

    // Pick the smallest of those, assuming we found any
    if (bigEnough.size() > 0) {
        return Collections.min(bigEnough, new CompareSizesByArea());
    } else {
        Log.e(TAG, "Couldn't find any suitable preview size");
        return choices[0];
    }
}
 

import android.util.Size; //導入依賴的package包/類
private void startPreview() {
    try {
        CameraCharacteristics characteristics = cameraManager.getCameraCharacteristics(cameraId);
        StreamConfigurationMap configMap = characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);

        Size previewSize = Util.getPreferredPreviewSize(
                configMap.getOutputSizes(ImageFormat.JPEG),textureView.getWidth(), textureView.getHeight());

        surfaceTexture.setDefaultBufferSize(previewSize.getWidth(),previewSize.getHeight());
        Surface surface = new Surface(surfaceTexture);
        captureBuilder = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
        captureBuilder.addTarget(surface);

        cameraDevice.createCaptureSession(Arrays.asList(surface),captureSessionCallback,backgroundHandler);
    } catch (CameraAccessException e) {
        e.printStackTrace();
    }
}
 

import android.util.Size; //導入依賴的package包/類
/**
 * Given {@code choices} of {@code Size}s supported by a camera, chooses the smallest one whose
 * width and height are at least as large as the respective requested values, and whose aspect
 * ratio matches with the specified value.
 *
 * @param choices     The list of sizes that the camera supports for the intended output class
 * @param width       The minimum desired width
 * @param height      The minimum desired height
 * @param aspectRatio The aspect ratio
 * @return The optimal {@code Size}, or an arbitrary one if none were big enough
 */
@SuppressLint("LongLogTag")
@DebugLog
private static Size chooseOptimalSize(
        final Size[] choices, final int width, final int height, final Size aspectRatio) {
    // Collect the supported resolutions that are at least as big as the preview Surface
    final List<Size> bigEnough = new ArrayList<Size>();
    for (final Size option : choices) {
        if (option.getHeight() >= MINIMUM_PREVIEW_SIZE && option.getWidth() >= MINIMUM_PREVIEW_SIZE) {
            Timber.tag(TAG).i("Adding size: " + option.getWidth() + "x" + option.getHeight());
            bigEnough.add(option);
        } else {
            Timber.tag(TAG).i("Not adding size: " + option.getWidth() + "x" + option.getHeight());
        }
    }

    // Pick the smallest of those, assuming we found any
    if (bigEnough.size() > 0) {
        final Size chosenSize = Collections.min(bigEnough, new CompareSizesByArea());
        Timber.tag(TAG).i("Chosen size: " + chosenSize.getWidth() + "x" + chosenSize.getHeight());
        return chosenSize;
    } else {
        Timber.tag(TAG).e("Couldn't find any suitable preview size");
        return choices[0];
    }
}
 

import android.util.Size; //導入依賴的package包/類
/**
 * Given {@code choices} of {@code Size}s supported by a camera, chooses the smallest one whose
 * width and height are at least as large as the respective requested values, and whose aspect
 * ratio matches with the specified value.
 *
 * @param choices     The list of sizes that the camera supports for the intended output class
 * @param width       The minimum desired width
 * @param height      The minimum desired height
 * @param aspectRatio The aspect ratio
 * @return The optimal {@code Size}, or an arbitrary one if none were big enough
 */
private static Size chooseOptimalSize(Size[] choices, int width, int height, Size aspectRatio) {
    // Collect the supported resolutions that are at least as big as the preview Surface
    List<Size> bigEnough = new ArrayList<>();
    int w = aspectRatio.getWidth();
    int h = aspectRatio.getHeight();
    for (Size option : choices) {
        if (option.getHeight() == option.getWidth() * h / w &&
                option.getWidth() >= width && option.getHeight() >= height) {
            bigEnough.add(option);
        }
    }

    // Pick the smallest of those, assuming we found any
    if (bigEnough.size() > 0) {
        return Collections.min(bigEnough, new CompareSizesByArea());
    } else {
        Log.e(TAG, "Couldn't find any suitable preview size");
        return choices[0];
    }
}
 

import android.util.Size; //導入依賴的package包/類
public void runCameraLiveView() {
    final Fragment cameraView = CameraConnectionFragment.newInstance(
            new CameraConnectionFragment.ConnectionCallback() {
                @Override
                public void onPreviewSizeChosen(Size size, int rotation) {
                    MainActivity.this.onPreviewSizeChosen(size);
                }
            },
            this,
            R.layout.placerecognizer_ui,
            new Size(mImageClassifier.getImageWidth(), mImageClassifier.getImageHeight())
    );

    getFragmentManager().beginTransaction()
                    .replace(R.id.container, cameraView)
                    .commit();
}
 

import android.util.Size; //導入依賴的package包/類
public void onPreviewSizeChosen(final Size size, final int rotation) {

    previewWidth = size.getWidth();
    previewHeight = size.getHeight();

    final Display display = getWindowManager().getDefaultDisplay();
    final int screenOrientation = display.getRotation();

    LOGGER.i("Sensor orientation: %d, Screen orientation: %d", rotation, screenOrientation);

    sensorOrientation = rotation + screenOrientation;

    LOGGER.i("Initializing at size %dx%d", previewWidth, previewHeight);
    rgbBytes = new int[previewWidth * previewHeight];
    rgbFrameBitmap = Bitmap.createBitmap(previewWidth, previewHeight, Bitmap.Config.ARGB_8888);
    croppedBitmap = Bitmap.createBitmap(INPUT_SIZE, INPUT_SIZE, Bitmap.Config.ARGB_8888);

    frameToCropTransform =
        ImageUtils.getTransformationMatrix(previewWidth, previewHeight, INPUT_SIZE, INPUT_SIZE,
            sensorOrientation, MAINTAIN_ASPECT);

    Matrix cropToFrameTransform = new Matrix();
    frameToCropTransform.invert(cropToFrameTransform);

    yuvBytes = new byte[3][];
  }
 

import android.util.Size; //導入依賴的package包/類
private static Size chooseOptimalSize(
        final Size[] choices, final int width, final int height, final Size aspectRatio) {
    // Collect the supported resolutions that are at least as big as the preview Surface
    final List<Size> bigEnough = new ArrayList<>();
    for (final Size option : choices) {
        if (option.getHeight() >= MINIMUM_PREVIEW_SIZE && option.getWidth() >= MINIMUM_PREVIEW_SIZE) {
            Log.i(TAG, "Adding size: " + option.getWidth() + "x" + option.getHeight());
            bigEnough.add(option);
        } else {
            Log.i(TAG, "Not adding size: " + option.getWidth() + "x" + option.getHeight());
        }
    }

    // Pick the smallest of those, assuming we found any
    if (bigEnough.size() > 0) {
        final Size chosenSize = Collections.min(bigEnough, new CompareSizesByArea());
        Log.i(TAG, "Chosen size: " + chosenSize.getWidth() + "x" + chosenSize.getHeight());
        return chosenSize;
    } else {
        Log.e(TAG, "Couldn't find any suitable preview size");
        return choices[0];
    }
}
 

import android.util.Size; //導入依賴的package包/類
@Override
public void collectRatioSizes() {
    ratioSizeList.clear();
    CameraCharacteristics characteristics;
    StreamConfigurationMap map = null;
    try {
        characteristics = ((CameraManager) getContext().getSystemService(Context.CAMERA_SERVICE)).getCameraCharacteristics(Integer.toString(Integer.parseInt(getCameraId())));
        map = characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
    } catch (CameraAccessException e) {
        e.printStackTrace();
    }

    Size[] outputSizes = map.getOutputSizes(SurfaceTexture.class);
    if (outputSizes != null) {
        List<Double> ratioList = new ArrayList<>();
        for (Size size : outputSizes) {
            double ratio = (double) size.getWidth() / (double) size.getHeight();
            if (!ratioList.contains(ratio)) {
                ratioList.add(ratio);
                ratioSizeList.add(new AspectRatio(ratio, size.getWidth(), size.getHeight()));
            }
        }
    }
}
 

import android.util.Size; //導入依賴的package包/類
/**
 * configures the ProportionalTextureView to respect the aspect ratio of the image and using an appropriate buffer size
 */
@VisibleForTesting
void configureTextureView(@NonNull ProportionalTextureView textureView, @ConfigurationOrientation int deviceOrientation,
                          @SurfaceRotation int relativeDisplayRotation, @NonNull Size previewSize) {
    switch (deviceOrientation) {
        case Configuration.ORIENTATION_PORTRAIT:
            // swap values because preview sizes are always landscape
            textureView.setAspectRatio(previewSize.getHeight(), previewSize.getWidth(), relativeDisplayRotation);
            break;
        case Configuration.ORIENTATION_LANDSCAPE:
            textureView.setAspectRatio(previewSize.getWidth(), previewSize.getHeight(), relativeDisplayRotation);
            break;
    }

    // working more memory efficient
    SurfaceTexture surface = textureView.getSurfaceTexture();
    if (surface != null) {
        surface.setDefaultBufferSize(previewSize.getWidth(), previewSize.getHeight());
    } else {
        throw new CameraException("surface texture not attached to view");
    }
}
 

import android.util.Size; //導入依賴的package包/類
/**
 * Chooses an appropriate size for the images within the preview stream.
 *
 * @param camera camera to get available preview sizes
 * @return the preview size to use
 * @throws CameraException if the preview size could not be determined
 */
@NonNull
public Size selectPreviewSize(@NonNull CameraDevice camera) {

    Size[] previewSizes = cameraCharacteristicsHelper.getPreviewOutputSizes(camera.getId());
    if (previewSizes == null || previewSizes.length == 0) {
        throw new CameraException("camera did not provide any preview size");
    }

    // preferably the preview has a size of 640x480 to save bandwidth while being large enough for the backend to be acceptable
    for (Size imageSize : previewSizes) {
        if (imageSize.getWidth() == 640 && imageSize.getHeight() == 480) {
            return imageSize;
        }
    }

    // fallback to first one which might not be optimal
    log.w("preferred preview size of 640x480 is not available, using %s", previewSizes[0]);
    return previewSizes[0];
}
 

import android.util.Size; //導入依賴的package包/類
@Before
public void setUp() throws Exception {
    surfaces = asList(surface1, surface2);

    when(manager.getCameraIdList()).thenReturn(new String[]{CAMERA_ID_1, CAMERA_ID_2});

    when(characteristicsHelper.getLensFacing(CAMERA_ID_1)).thenReturn(CameraCharacteristics.LENS_FACING_BACK);
    when(characteristicsHelper.getLensFacing(CAMERA_ID_2)).thenReturn(CameraCharacteristics.LENS_FACING_FRONT);
    when(characteristicsHelper.getSensorOrientation(CAMERA_ID_1)).thenReturn(SENSOR_ROTATION);
    when(characteristicsHelper.getPreviewOutputSizes(CAMERA_ID_1)).thenReturn(
            new Size[]{PREVIEWSIZE_1, PREVIEWSIZE_640x480, PREVIEWSIZE_2});

    when(camera.getId()).thenReturn(CAMERA_ID_1);
    when(camera.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW)).thenReturn(captureRequestBuilder);

    when(textureView.getSurfaceTexture()).thenReturn(surfaceTexture);
}
 

import android.util.Size; //導入依賴的package包/類
/**
 * We choose a largest video size with mAspectRatio. Also, we don't use sizes
 * larger than 1080p, since MediaRecorder cannot handle such a high-resolution video.
 *
 * @param choices The list of available sizes
 * @return The video size
 */
Size chooseVideoSize(Size[] choices) {
    List<Size> videoSizes = Arrays.asList(choices);
    List<Size> supportedVideoSizes = new ArrayList<>();
    Collections.sort(videoSizes, new CompareSizesByArea());
    for (int i = videoSizes.size() - 1; i >= 0; i--) {
        if (videoSizes.get(i).getWidth() <= MAX_PREVIEW_WIDTH &&
            videoSizes.get(i).getHeight() <= MAX_PREVIEW_HEIGHT) {
            supportedVideoSizes.add(videoSizes.get(i));
            if (videoSizes.get(i).getWidth() == videoSizes.get(i).getHeight() *
                mAspectRatio.getX() / mAspectRatio.getY()) {
                return videoSizes.get(i);
            }
        }
    }
    return supportedVideoSizes.size() > 0 ? supportedVideoSizes.get(0) : choices[choices.length - 1];
}
 

import android.util.Size; //導入依賴的package包/類
/**
 * Given {@code choices} of {@code Size}s supported by a camera, choose the smallest one that
 * is at least as large as the respective texture view size, and that is at most as large as the
 * respective max size, and whose aspect ratio matches with the specified value. If such size
 * doesn't exist, choose the largest one that is at most as large as the respective max size,
 * and whose aspect ratio matches with the specified value.
 *
 * @param choices           The list of sizes that the camera supports for the intended output
 *                          class
 * @param textureViewWidth  The width of the texture view relative to sensor coordinate
 * @param textureViewHeight The height of the texture view relative to sensor coordinate
 * @param maxWidth          The maximum width that can be chosen
 * @param maxHeight         The maximum height that can be chosen
 * @param aspectRatio       The aspect ratio
 * @return The optimal {@code Size}, or an arbitrary one if none were big enough
 */
private static Size chooseOptimalSize(Size[] choices, int textureViewWidth,
                                      int textureViewHeight, int maxWidth, int maxHeight, Size aspectRatio) {

    // Collect the supported resolutions that are at least as big as the preview Surface
    List<Size> bigEnough = new ArrayList<>();
    // Collect the supported resolutions that are smaller than the preview Surface
    List<Size> notBigEnough = new ArrayList<>();
    int w = aspectRatio.getWidth();
    int h = aspectRatio.getHeight();
    for (Size option : choices) {
        if (option.getWidth() <= maxWidth && option.getHeight() <= maxHeight &&
                option.getHeight() == option.getWidth() * h / w) {
            if (option.getWidth() >= textureViewWidth &&
                    option.getHeight() >= textureViewHeight) {
                bigEnough.add(option);
            } else {
                notBigEnough.add(option);
            }
        }
    }

    // Pick the smallest of those big enough. If there is no one big enough, pick the
    // largest of those not big enough.
    if (bigEnough.size() > 0) {
        return Collections.min(bigEnough, new CompareSizesByArea());
    } else if (notBigEnough.size() > 0) {
        return Collections.max(notBigEnough, new CompareSizesByArea());
    } else {
        Log.e(TAG, "Couldn't find any suitable preview size");
        return choices[0];
    }
}