下面列出了android.hardware.Camera#getParameters ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
/**
* Reads, one time, values from the camera that are needed by the app.
*/
void initFromCameraParameters(Camera camera) {
Camera.Parameters parameters = camera.getParameters();
WindowManager manager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
Display display = manager.getDefaultDisplay();
int width = display.getWidth();
int height = display.getHeight();
// We're landscape-only, and have apparently seen issues with display
// thinking it's portrait
// when waking from sleep. If it's not landscape, assume it's mistaken
// and reverse them:
if (width < height) {
Log.i(TAG, "Display reports portrait orientation; assuming this is incorrect");
int temp = width;
width = height;
height = temp;
}
screenResolution = new Point(width, height);
Log.i(TAG, "Screen resolution: " + screenResolution);
cameraResolution = findBestPreviewSizeValue(parameters, screenResolution, false);
Log.i(TAG, "Camera resolution: " + cameraResolution);
}
private boolean setZoom(int zoom, CallbackContext callbackContext) {
if(this.hasCamera(callbackContext) == false){
return true;
}
Camera camera = fragment.getCamera();
Camera.Parameters params = camera.getParameters();
if (camera.getParameters().isZoomSupported()) {
params.setZoom(zoom);
fragment.setCameraParameters(params);
callbackContext.success(zoom);
} else {
callbackContext.error("Zoom not supported");
}
return true;
}
private boolean hasDeviceAutofocusCapability() throws FDroidDeviceException {
try {
final int numberOfCameras = Camera.getNumberOfCameras();
if (numberOfCameras == 0) {
Log.i(TAG, "No camera on device");
return false;
}
boolean hasAutofocus = false;
for (int cameraId = 0; cameraId < numberOfCameras; cameraId++) {
Camera camera = Camera.open(cameraId);
Camera.Parameters parameters = camera.getParameters();
List<String> availableAFModes = parameters.getSupportedFocusModes();
hasAutofocus = availableAFModes.contains(Camera.Parameters.FOCUS_MODE_AUTO);
}
return hasAutofocus;
} catch (Exception e) {
String msg = "Exception accessing device camera";
Log.e(TAG, msg, e);
throw new FDroidDeviceException(msg, e);
}
}
private boolean getSupportedWhiteBalanceModes(CallbackContext callbackContext) {
if(this.hasCamera(callbackContext) == false){
return true;
}
Camera camera = fragment.getCamera();
Camera.Parameters params = camera.getParameters();
List<String> supportedWhiteBalanceModes;
supportedWhiteBalanceModes = params.getSupportedWhiteBalance();
JSONArray jsonWhiteBalanceModes = new JSONArray();
if (camera.getParameters().isAutoWhiteBalanceLockSupported()) {
jsonWhiteBalanceModes.put(new String("lock"));
}
if (supportedWhiteBalanceModes != null) {
for (int i=0; i<supportedWhiteBalanceModes.size(); i++) {
jsonWhiteBalanceModes.put(new String(supportedWhiteBalanceModes.get(i)));
}
}
callbackContext.success(jsonWhiteBalanceModes);
return true;
}
/**
* Sets the camera up to take preview images which are used for both preview and decoding.
* We detect the preview format here so that buildLuminanceSource() can build an appropriate
* LuminanceSource subclass. In the future we may want to force YUV420SP as it's the smallest,
* and the planar Y can be used for barcode scanning without a copy in some cases.
*/
void setDesiredCameraParameters(Camera camera) {
Camera.Parameters parameters = camera.getParameters();
Log.d(TAG, "Setting preview size: " + cameraResolution);
parameters.setPreviewSize(cameraResolution.x, cameraResolution.y);
setFlash(parameters);
setZoom(parameters);
//setSharpness(parameters);
//modify here
camera.setDisplayOrientation(90);
camera.setParameters(parameters);
}
public static boolean setCameraContinuousFocus(Camera camera) {
if (camera == null) return false;
Camera.Parameters parameters = camera.getParameters();
if (parameters == null) return false;
List<String> focusModes = parameters.getSupportedFocusModes();
if (focusModes.contains("continuous-video")) {
parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
camera.setParameters(parameters);
Log.v(TAG, "use continuous video mode");
return true;
}
return false;
}
public void setCamera(Camera camera) {
mCamera = camera;
if (camera != null) {
Camera.Parameters params = camera.getParameters();
mIsZoomSupported = params.isZoomSupported();
if (mIsZoomSupported) {
mMaxZoom = params.getMaxZoom();
}
}
}
void setDesiredCameraParameters(Camera camera) {
Camera.Parameters parameters = camera.getParameters();
if (parameters == null) {
Log.w(TAG, "Device error: no camera parameters are available. Proceeding without configuration.");
return;
}
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
initializeTorch(parameters, prefs);
String focusMode = null;
if (prefs.getBoolean(PreferencesActivity.KEY_AUTO_FOCUS, true)) {
if (prefs.getBoolean(PreferencesActivity.KEY_DISABLE_CONTINUOUS_FOCUS, false)) {
focusMode = findSettableValue(parameters.getSupportedFocusModes(),
Camera.Parameters.FOCUS_MODE_AUTO);
} else {
focusMode = findSettableValue(parameters.getSupportedFocusModes(),
"continuous-video", // Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO in 4.0+
"continuous-picture", // Camera.Paramters.FOCUS_MODE_CONTINUOUS_PICTURE in 4.0+
Camera.Parameters.FOCUS_MODE_AUTO);
}
}
// Maybe selected auto-focus but not available, so fall through here:
if (focusMode == null) {
focusMode = findSettableValue(parameters.getSupportedFocusModes(),
Camera.Parameters.FOCUS_MODE_MACRO,
"edof"); // Camera.Parameters.FOCUS_MODE_EDOF in 2.2+
}
if (focusMode != null) {
parameters.setFocusMode(focusMode);
}
parameters.setPreviewSize(cameraResolution.x, cameraResolution.y);
camera.setParameters(parameters);
}
private boolean setExposureCompensation(int exposureCompensation, CallbackContext callbackContext) {
if(this.hasCamera(callbackContext) == false){
return true;
}
Camera camera = fragment.getCamera();
Camera.Parameters params = camera.getParameters();
int minExposureCompensation = camera.getParameters().getMinExposureCompensation();
int maxExposureCompensation = camera.getParameters().getMaxExposureCompensation();
if ( minExposureCompensation == 0 && maxExposureCompensation == 0) {
callbackContext.error("Exposure corection not supported");
} else {
if (exposureCompensation < minExposureCompensation) {
exposureCompensation = minExposureCompensation;
} else if (exposureCompensation > maxExposureCompensation) {
exposureCompensation = maxExposureCompensation;
}
params.setExposureCompensation(exposureCompensation);
fragment.setCameraParameters(params);
callbackContext.success(exposureCompensation);
}
return true;
}
public void setDesiredCameraParameters(Camera camera, boolean safeMode) {
Camera.Parameters parameters = camera.getParameters();
if (parameters == null) {
Log.w(TAG, "Device error: no camera parameters are available. Proceeding without configuration.");
return;
}
Log.i(TAG, "Initial camera parameters: " + parameters.flatten());
if (safeMode) {
Log.w(TAG, "In camera config safe mode -- most settings will not be honored");
}
parameters.setPreviewSize(cameraResolution.x, cameraResolution.y);
camera.setParameters(parameters);
Camera.Parameters afterParameters = camera.getParameters();
Camera.Size afterSize = afterParameters.getPreviewSize();
if (afterSize != null && (cameraResolution.x != afterSize.width || cameraResolution.y != afterSize.height)) {
Log.w(TAG, "Camera said it supported preview size " + cameraResolution.x + 'x' + cameraResolution.y + ", but after setting it, preview size is " + afterSize.width + 'x' + afterSize.height);
cameraResolution.x = afterSize.width;
cameraResolution.y = afterSize.height;
}
/** 设置相机预览为竖屏 */
String model=android.os.Build.MODEL;
if("Nexus 5X".equals(model)){
camera.setDisplayOrientation(270);
}else{
camera.setDisplayOrientation(90);
}
}
/**
* Opens the camera driver and initializes the hardware parameters.
*
* @param holder The surface object which the camera will draw preview frames into.
*
* @throws IOException Indicates the camera driver failed to open.
*/
public synchronized void openDriver(SurfaceHolder holder) throws IOException {
OpenCamera theCamera = camera;
if (theCamera == null) {
theCamera = OpenCameraInterface.open(requestedCameraId);
if (theCamera == null) {
throw new IOException("Camera.open() failed to return object from driver");
}
camera = theCamera;
}
if (!initialized) {
initialized = true;
configManager.initFromCameraParameters(theCamera);
if (requestedFramingRectWidth > 0 && requestedFramingRectHeight > 0) {
setManualFramingRect(requestedFramingRectWidth, requestedFramingRectHeight);
requestedFramingRectWidth = 0;
requestedFramingRectHeight = 0;
}
}
Camera cameraObject = theCamera.getCamera();
Camera.Parameters parameters = cameraObject.getParameters();
String parametersFlattened = parameters == null ? null : parameters.flatten(); // Save
// these, temporarily
try {
configManager.setDesiredCameraParameters(theCamera, false);
} catch (RuntimeException re) {
// Driver failed
if (DEBUG) {
Log.w(TAG, "Camera rejected parameters. Setting only minimal safe-mode parameters");
Log.i(TAG, "Resetting to saved camera params: " + parametersFlattened);
}
// Reset:
if (parametersFlattened != null) {
parameters = cameraObject.getParameters();
parameters.unflatten(parametersFlattened);
try {
cameraObject.setParameters(parameters);
configManager.setDesiredCameraParameters(theCamera, true);
} catch (RuntimeException re2) {
// Well, darn. Give up
Log.w(TAG, "Camera rejected even safe-mode parameters! No configuration");
}
}
}
cameraObject.setPreviewDisplay(holder);
}
/**
* Opens the camera driver and initializes the hardware parameters.
*
* @param holder The surface object which the camera will draw preview frames into.
* @throws IOException Indicates the camera driver failed to open.
*/
public synchronized void openDriver(SurfaceHolder holder) throws IOException {
Camera theCamera = camera;
if (theCamera == null) {
theCamera = new OpenCameraManager().build().open();
if (theCamera == null) {
throw new IOException();
}
camera = theCamera;
}
theCamera.setPreviewDisplay(holder);
if (!initialized) {
initialized = true;
configManager.initFromCameraParameters(theCamera);
if (requestedFramingRectWidth > 0 && requestedFramingRectHeight > 0) {
setManualFramingRect(requestedFramingRectWidth, requestedFramingRectHeight);
requestedFramingRectWidth = 0;
requestedFramingRectHeight = 0;
}
}
Camera.Parameters parameters = theCamera.getParameters();
String parametersFlattened = parameters == null ? null : parameters.flatten(); // Save these, temporarily
try {
configManager.setDesiredCameraParameters(theCamera, false);
} catch (RuntimeException re) {
// Driver failed
Log.w(TAG, "Camera rejected parameters. Setting only minimal safe-mode parameters");
Log.i(TAG, "Resetting to saved camera params: " + parametersFlattened);
// Reset:
if (parametersFlattened != null) {
parameters = theCamera.getParameters();
parameters.unflatten(parametersFlattened);
try {
theCamera.setParameters(parameters);
configManager.setDesiredCameraParameters(theCamera, true);
} catch (RuntimeException re2) {
// Well, darn. Give up
Log.w(TAG, "Camera rejected even safe-mode parameters! No configuration");
}
}
}
}
/**
* Opens the camera driver and initializes the hardware parameters.
*
* @param holder The surface object which the camera will draw preview frames
* into.
* @throws IOException Indicates the camera driver failed to open.
*/
public synchronized void openDriver(SurfaceHolder holder) throws IOException {
Camera theCamera = camera;
if (theCamera == null) {
if (requestedCameraId >= 0) {
theCamera = OpenCameraInterface.open(requestedCameraId);
} else {
theCamera = OpenCameraInterface.open();
}
if (theCamera == null) {
throw new IOException();
}
camera = theCamera;
}
theCamera.setPreviewDisplay(holder);
if (!initialized) {
initialized = true;
configManager.initFromCameraParameters(theCamera);
}
Camera.Parameters parameters = theCamera.getParameters();
String parametersFlattened = parameters == null ? null : parameters.flatten(); // Save
// these,
// temporarily
try {
configManager.setDesiredCameraParameters(theCamera, false);
} catch (RuntimeException re) {
// Driver failed
Log.w(TAG, "Camera rejected parameters. Setting only minimal safe-mode parameters");
Log.i(TAG, "Resetting to saved camera params: " + parametersFlattened);
// Reset:
if (parametersFlattened != null) {
parameters = theCamera.getParameters();
parameters.unflatten(parametersFlattened);
try {
theCamera.setParameters(parameters);
configManager.setDesiredCameraParameters(theCamera, true);
} catch (RuntimeException re2) {
// Well, darn. Give up
Log.w(TAG, "Camera rejected even safe-mode parameters! No configuration");
}
}
}
}
/**
* Opens the camera and applies the user settings.
*
* @throws RuntimeException if the method fails
*/
@SuppressLint("InlinedApi")
private Camera createCamera() {
int requestedCameraId = getIdForRequestedCamera(mFacing);
if (requestedCameraId == -1) {
throw new RuntimeException("Could not find requested camera.");
}
Camera camera = Camera.open(requestedCameraId);
SizePair sizePair = selectSizePair(camera, mRequestedPreviewWidth, mRequestedPreviewHeight);
if (sizePair == null) {
throw new RuntimeException("Could not find suitable preview size.");
}
Size pictureSize = sizePair.pictureSize();
mPreviewSize = sizePair.previewSize();
int[] previewFpsRange = selectPreviewFpsRange(camera, mRequestedFps);
if (previewFpsRange == null) {
throw new RuntimeException("Could not find suitable preview frames per second range.");
}
Camera.Parameters parameters = camera.getParameters();
if (pictureSize != null) {
parameters.setPictureSize(pictureSize.getWidth(), pictureSize.getHeight());
}
parameters.setPreviewSize(mPreviewSize.getWidth(), mPreviewSize.getHeight());
parameters.setPreviewFpsRange(
previewFpsRange[Camera.Parameters.PREVIEW_FPS_MIN_INDEX],
previewFpsRange[Camera.Parameters.PREVIEW_FPS_MAX_INDEX]);
parameters.setPreviewFormat(ImageFormat.NV21);
setRotation(camera, parameters, requestedCameraId);
if (mFocusMode != null) {
if (parameters.getSupportedFocusModes().contains(
mFocusMode)) {
parameters.setFocusMode(mFocusMode);
} else {
Log.i(TAG, "Camera focus mode: " + mFocusMode +
" is not supported on this device.");
}
}
// setting mFocusMode to the one set in the params
mFocusMode = parameters.getFocusMode();
if (mFlashMode != null) {
if (parameters.getSupportedFlashModes().contains(
mFlashMode)) {
parameters.setFlashMode(mFlashMode);
} else {
Log.i(TAG, "Camera flash mode: " + mFlashMode +
" is not supported on this device.");
}
}
// setting mFlashMode to the one set in the params
mFlashMode = parameters.getFlashMode();
camera.setParameters(parameters);
// Four frame buffers are needed for working with the camera:
//
// one for the frame that is currently being executed upon in doing detection
// one for the next pending frame to process immediately upon completing detection
// two for the frames that the camera uses to populate future preview images
camera.setPreviewCallbackWithBuffer(new CameraPreviewCallback());
camera.addCallbackBuffer(createPreviewBuffer(mPreviewSize));
camera.addCallbackBuffer(createPreviewBuffer(mPreviewSize));
camera.addCallbackBuffer(createPreviewBuffer(mPreviewSize));
camera.addCallbackBuffer(createPreviewBuffer(mPreviewSize));
return camera;
}
/**
* Opens the camera driver and initializes the hardware parameters.
*
* @param holder
* The surface object which the camera will draw preview frames
* into.
* @throws IOException
* Indicates the camera driver failed to open.
*/
public synchronized void openDriver(SurfaceHolder holder) throws IOException {
Camera theCamera = camera;
if (theCamera == null) {
if (requestedCameraId >= 0) {
theCamera = OpenCameraInterface.open(requestedCameraId);
} else {
theCamera = OpenCameraInterface.open();
}
if (theCamera == null) {
throw new IOException();
}
camera = theCamera;
}
theCamera.setPreviewDisplay(holder);
if (!initialized) {
initialized = true;
configManager.initFromCameraParameters(theCamera);
}
Camera.Parameters parameters = theCamera.getParameters();
String parametersFlattened = parameters == null ? null : parameters.flatten(); // Save
// these,
// temporarily
try {
configManager.setDesiredCameraParameters(theCamera, false);
} catch (RuntimeException re) {
// Driver failed
Log.w(TAG, "Camera rejected parameters. Setting only minimal safe-mode parameters");
Log.i(TAG, "Resetting to saved camera params: " + parametersFlattened);
// Reset:
if (parametersFlattened != null) {
parameters = theCamera.getParameters();
parameters.unflatten(parametersFlattened);
try {
theCamera.setParameters(parameters);
configManager.setDesiredCameraParameters(theCamera, true);
} catch (RuntimeException re2) {
// Well, darn. Give up
Log.w(TAG, "Camera rejected even safe-mode parameters! No configuration");
}
}
}
}
/**
* Opens the camera and applies the user settings.
*
* @throws RuntimeException if the method fails
*/
@SuppressLint("InlinedApi")
private Camera createCamera() {
int requestedCameraId = getIdForRequestedCamera(mFacing);
if (requestedCameraId == -1) {
throw new RuntimeException("Could not find requested camera.");
}
Camera camera = Camera.open(requestedCameraId);
SizePair sizePair = selectSizePair(camera, mRequestedPreviewWidth, mRequestedPreviewHeight);
if (sizePair == null) {
throw new RuntimeException("Could not find suitable preview size.");
}
Size pictureSize = sizePair.pictureSize();
mPreviewSize = sizePair.previewSize();
int[] previewFpsRange = selectPreviewFpsRange(camera, mRequestedFps);
if (previewFpsRange == null) {
throw new RuntimeException("Could not find suitable preview frames per second range.");
}
Camera.Parameters parameters = camera.getParameters();
if (pictureSize != null) {
parameters.setPictureSize(pictureSize.getWidth(), pictureSize.getHeight());
}
parameters.setPreviewSize(mPreviewSize.getWidth(), mPreviewSize.getHeight());
parameters.setPreviewFpsRange(
previewFpsRange[Camera.Parameters.PREVIEW_FPS_MIN_INDEX],
previewFpsRange[Camera.Parameters.PREVIEW_FPS_MAX_INDEX]);
parameters.setPreviewFormat(ImageFormat.NV21);
setRotation(camera, parameters, requestedCameraId);
if (mFocusMode != null) {
if (parameters.getSupportedFocusModes().contains(
mFocusMode)) {
parameters.setFocusMode(mFocusMode);
} else {
Log.i(TAG, "Camera focus mode: " + mFocusMode + " is not supported on this device.");
}
}
// setting mFocusMode to the one set in the params
mFocusMode = parameters.getFocusMode();
if (mFlashMode != null) {
if (parameters.getSupportedFlashModes() != null) {
if (parameters.getSupportedFlashModes().contains(
mFlashMode)) {
parameters.setFlashMode(mFlashMode);
} else {
Log.i(TAG, "Camera flash mode: " + mFlashMode + " is not supported on this device.");
}
}
}
// setting mFlashMode to the one set in the params
mFlashMode = parameters.getFlashMode();
camera.setParameters(parameters);
// Four frame buffers are needed for working with the camera:
//
// one for the frame that is currently being executed upon in doing detection
// one for the next pending frame to process immediately upon completing detection
// two for the frames that the camera uses to populate future preview images
camera.setPreviewCallbackWithBuffer(new CameraPreviewCallback());
camera.addCallbackBuffer(createPreviewBuffer(mPreviewSize));
camera.addCallbackBuffer(createPreviewBuffer(mPreviewSize));
camera.addCallbackBuffer(createPreviewBuffer(mPreviewSize));
camera.addCallbackBuffer(createPreviewBuffer(mPreviewSize));
return camera;
}
/**
* Opens the camera driver and initializes the hardware parameters.
*
* @param holder The surface object which the camera will draw preview frames into.
* @throws IOException Indicates the camera driver failed to open.
*/
public synchronized void openDriver(SurfaceHolder holder) throws IOException {
Camera theCamera = camera;
if (theCamera == null) {
theCamera = new OpenCameraManager().build().open();
if (theCamera == null) {
throw new IOException();
}
camera = theCamera;
}
theCamera.setPreviewDisplay(holder);
if (!initialized) {
initialized = true;
configManager.initFromCameraParameters(theCamera);
if (requestedFramingRectWidth > 0 && requestedFramingRectHeight > 0) {
setManualFramingRect(requestedFramingRectWidth, requestedFramingRectHeight);
requestedFramingRectWidth = 0;
requestedFramingRectHeight = 0;
}
}
Camera.Parameters parameters = theCamera.getParameters();
String parametersFlattened = parameters == null ? null : parameters.flatten(); // Save these, temporarily
try {
configManager.setDesiredCameraParameters(theCamera, false);
} catch (RuntimeException re) {
// Driver failed
Log.w(TAG, "Camera rejected parameters. Setting only minimal safe-mode parameters");
Log.i(TAG, "Resetting to saved camera params: " + parametersFlattened);
// Reset:
if (parametersFlattened != null) {
parameters = theCamera.getParameters();
parameters.unflatten(parametersFlattened);
try {
theCamera.setParameters(parameters);
configManager.setDesiredCameraParameters(theCamera, true);
} catch (RuntimeException re2) {
// Well, darn. Give up
Log.w(TAG, "Camera rejected even safe-mode parameters! No configuration");
}
}
}
}
void setTorch(Camera camera, boolean newSetting) {
Camera.Parameters parameters = camera.getParameters();
doSetTorch(parameters, newSetting, false);
camera.setParameters(parameters);
}
void setTorch(Camera camera, boolean newSetting) {
Camera.Parameters parameters = camera.getParameters();
doSetTorch(parameters, newSetting, false);
camera.setParameters(parameters);
}
/**
* Opens the camera driver and initializes the hardware parameters.
*
* @param holder
* The surface object which the camera will draw preview frames
* into.
* @throws IOException
* Indicates the camera driver failed to open.
*/
public synchronized void openDriver(SurfaceHolder holder) throws IOException {
Camera theCamera = camera;
if (theCamera == null) {
if (requestedCameraId >= 0) {
theCamera = OpenCameraInterface.open(requestedCameraId);
} else {
theCamera = OpenCameraInterface.open();
}
if (theCamera == null) {
throw new IOException();
}
camera = theCamera;
}
theCamera.setPreviewDisplay(holder);
if (!initialized) {
initialized = true;
configManager.initFromCameraParameters(theCamera);
}
Camera.Parameters parameters = theCamera.getParameters();
String parametersFlattened = parameters == null ? null : parameters.flatten(); // Save
// these,
// temporarily
try {
configManager.setDesiredCameraParameters(theCamera, false);
} catch (RuntimeException re) {
// Driver failed
Log.w(TAG, "Camera rejected parameters. Setting only minimal safe-mode parameters");
Log.i(TAG, "Resetting to saved camera params: " + parametersFlattened);
// Reset:
if (parametersFlattened != null) {
parameters = theCamera.getParameters();
parameters.unflatten(parametersFlattened);
try {
theCamera.setParameters(parameters);
configManager.setDesiredCameraParameters(theCamera, true);
} catch (RuntimeException re2) {
// Well, darn. Give up
Log.w(TAG, "Camera rejected even safe-mode parameters! No configuration");
}
}
}
}