public static boolean isFlashSupported(Camera camera, Context context) {
mPreferences = PreferenceManager.getDefaultSharedPreferences(context);
if (camera != null) {
Camera.Parameters mParameters = camera.getParameters();
if (mParameters.getFlashMode() == null) {
mPrefFlash = mPreferences.edit().putBoolean("mPrefFlash", false).commit();
return false;
}
List<String> mSupportedFlashModes = mParameters.getSupportedFlashModes();
if (mSupportedFlashModes == null
|| mSupportedFlashModes.isEmpty()
|| mSupportedFlashModes.size() == 1
&& mSupportedFlashModes.get(0).equals(Camera.Parameters.FLASH_MODE_OFF)) {
mPrefFlash = mPreferences.edit().putBoolean("mPrefFlash", false).commit();
return false;
}
} else {
mPrefFlash = mPreferences.edit().putBoolean("mPrefFlash", false).commit();
return false;
}
mPrefFlash = mPreferences.edit().putBoolean("mPrefFlash", true).commit();
return true;
}
public void offLight() {
if (camera != null) {
Camera.Parameters parameter = camera.getParameters();
parameter.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);
camera.setParameters(parameter);
}
}
public static void setBestPreviewFPS(Camera.Parameters parameters, int minFPS, int maxFPS) {
List<int[]> supportedPreviewFpsRanges = parameters.getSupportedPreviewFpsRange();
Log.i(TAG, "Supported FPS ranges: " + toString(supportedPreviewFpsRanges));
if (supportedPreviewFpsRanges != null && !supportedPreviewFpsRanges.isEmpty()) {
int[] suitableFPSRange = null;
for (int[] fpsRange : supportedPreviewFpsRanges) {
int thisMin = fpsRange[Camera.Parameters.PREVIEW_FPS_MIN_INDEX];
int thisMax = fpsRange[Camera.Parameters.PREVIEW_FPS_MAX_INDEX];
if (thisMin >= minFPS * 1000 && thisMax <= maxFPS * 1000) {
suitableFPSRange = fpsRange;
break;
}
}
if (suitableFPSRange == null) {
Log.i(TAG, "No suitable FPS range?");
} else {
int[] currentFpsRange = new int[2];
parameters.getPreviewFpsRange(currentFpsRange);
if (Arrays.equals(currentFpsRange, suitableFPSRange)) {
Log.i(TAG, "FPS range already set to " + Arrays.toString(suitableFPSRange));
} else {
Log.i(TAG, "Setting FPS range to " + Arrays.toString(suitableFPSRange));
parameters.setPreviewFpsRange(
suitableFPSRange[Camera.Parameters.PREVIEW_FPS_MIN_INDEX],
suitableFPSRange[Camera.Parameters.PREVIEW_FPS_MAX_INDEX]);
}
}
}
}
@Override
public void setPreviewHeight(int mPreviewHeight) {
this.mPreviewHeight = mPreviewHeight;
Camera.Parameters parameters = mCamera.getParameters();
// 设置预览照片的大小
parameters.setPreviewSize(mPreviewWidth, mPreviewHeight);
}
@Override
public void onPreviewFrame(byte[] data, Camera camera) {
Camera.Parameters params = camera.getParameters();
int w = params.getPreviewSize().width;
int h = params.getPreviewSize().height;
int format = params.getPreviewFormat();
ByteArrayOutputStream out = new ByteArrayOutputStream();
YuvImage image = new YuvImage(data, format, w, h, null);
Rect area = new Rect(0, 0, w, h);
long start = System.currentTimeMillis();
image.compressToJpeg(area, imageQuality, out);
long end = System.currentTimeMillis();
long pingTime = ServerConnector.getInstance().getPingTime() + (end - start);
if (pingTime > 50 && imageQuality > 25) {
imageQuality--;
} else if (pingTime < 50 && imageQuality < 100) {
imageQuality++;
}
Log.i("image", "" + imageQuality);
ServerConnector.getInstance().pushImage(out.toByteArray());
}
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Hide the window title.
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
getWindow().setFormat(PixelFormat.UNKNOWN);
setContentView(R.layout.main);
// Create an instance of Camera
mCamera = getCameraInstance();
Camera.Parameters mParameters = mCamera.getParameters();
mParameters.setFlashMode(Camera.Parameters.FLASH_MODE_AUTO);
// mParameters.setFlashMode(Camera.Parameters.FLASH_MODE_ON);
mCamera.setParameters(mParameters);
// Create our Preview view and set it as the content of our activity.
mPreview = new Preview(this, mCamera);
FrameLayout preview = (FrameLayout) findViewById(R.id.preview);
preview.addView(mPreview);
// Create our Overlay
mOverlay = new Overlay(this);
preview.addView(mOverlay);
mPreview.setOverlay(mOverlay);
// Setting buttons
buttonProc = (Button) findViewById(R.id.buttonProc);
buttonBinImage = (Button) findViewById(R.id.buttonBinaryImage);
buttonReset = (Button) findViewById(R.id.buttonReset);
buttonProc.setOnClickListener(snapAndProcess());
buttonBinImage.setOnClickListener(switchBinaryImage());
buttonReset.setOnClickListener(reset());
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
Log.e(TAG, "surfaceChanged => w=" + w + ", h=" + h);
// If your preview can change or rotate, take care of those events here.
// Make sure to stop the preview before resizing or reformatting it.
if (mHolder.getSurface() == null) {
// preview surface does not exist
return;
}
// stop preview before making changes
try {
mCamera.stopPreview();
} catch (Exception e) {
// ignore: tried to stop a non-existent preview
}
// set preview size and make any resize, rotate or reformatting changes here
// start preview with new settings
try {
Camera.Parameters parameters = mCamera.getParameters();
/* INSERT ZOOM HERE */
parameters.setPreviewSize(mPreviewSize.width, mPreviewSize.height);
parameters.setRotation(90);
mCamera.setParameters(parameters);
mCamera.setDisplayOrientation(90);
mCamera.setPreviewDisplay(mHolder);
mCamera.startPreview();
} catch (Exception e) {
Log.d(TAG, "Error starting camera preview: " + e.getMessage());
}
}
private void setPreviewCallback() {
if (mCamera == null) {
android.util.Log.e("MOSYNC INTERNAL", "No Preview set");
return;
}
try {
// We have to use and static instance of the camera in the reflection here
mSetPreviewCallbackWithBuffer =
mCamera
.getClass()
.getMethod("setPreviewCallbackWithBuffer", Camera.PreviewCallback.class);
Camera.Parameters parameters = getCurrentParameters();
Camera.Size size = parameters.getPreviewSize();
mCallbackBuffer = new byte[size.width * size.height * 4];
mCamera.addCallbackBuffer(mCallbackBuffer);
mIsUsingPreviewCallbackBuffer = true;
mCamera.setPreviewCallbackWithBuffer(previewCallback);
} catch (NoSuchMethodException nsme) {
mIsUsingPreviewCallbackBuffer = false;
mCamera.setPreviewCallback(previewCallback);
}
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
try {
// open the camera
camera = Camera.open(1);
} catch (RuntimeException e) {
// check for exceptions
System.err.println(e);
return;
}
Camera.Parameters param;
param = camera.getParameters();
// modify parameter
param.setPreviewSize(352, 288);
camera.setParameters(param);
try {
// The Surface has been created, now tell the camera where to draw
// the preview.
camera.setPreviewDisplay(surfaceHolder);
camera.setDisplayOrientation(90);
camera.startPreview();
} catch (Exception e) {
// check for exceptions
System.err.println(e);
return;
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
if (mHolder.getSurface() == null) {
// preview surface does not exist
return;
}
// stop preview before making changes
try {
mCamera.stopPreview();
} catch (Exception e) {
// ignore: tried to stop a non-existent preview
}
// Sets preview size.
Camera.Parameters parameters = mCamera.getParameters();
List<Camera.Size> sizes = parameters.getSupportedPreviewSizes();
Camera.Size cs = sizes.get(0);
parameters.setPreviewSize(cs.width, cs.height);
mCamera.setParameters(parameters);
// start preview with new settings
try {
mCamera.setPreviewDisplay(mHolder);
mCamera.startPreview();
} catch (Exception e) {
Log.d(TAG, "Error starting camera preview: " + e.getMessage());
}
Log.e(TAG, "SurfaceChanged.");
}
private void doSetTorch(Camera.Parameters parameters, boolean newSetting, boolean safeMode) {
String flashMode;
if (newSetting) {
flashMode =
findSettableValue(
parameters.getSupportedFlashModes(),
Camera.Parameters.FLASH_MODE_TORCH,
Camera.Parameters.FLASH_MODE_ON);
} else {
flashMode =
findSettableValue(parameters.getSupportedFlashModes(), Camera.Parameters.FLASH_MODE_OFF);
}
if (flashMode != null) {
parameters.setFlashMode(flashMode);
}
/*
* SharedPreferences prefs =
* PreferenceManager.getDefaultSharedPreferences(context); if
* (!prefs.getBoolean(PreferencesActivity.KEY_DISABLE_EXPOSURE, false))
* { if (!safeMode) { int minExposure =
* parameters.getMinExposureCompensation(); int maxExposure =
* parameters.getMaxExposureCompensation(); if (minExposure != 0 ||
* maxExposure != 0) { float step =
* parameters.getExposureCompensationStep(); int desiredCompensation; if
* (newSetting) { // Light on; set low exposue compensation
* desiredCompensation = Math.max((int) (MIN_EXPOSURE_COMPENSATION /
* step), minExposure); } else { // Light off; set high compensation
* desiredCompensation = Math.min((int) (MAX_EXPOSURE_COMPENSATION /
* step), maxExposure); } Log.i(TAG, "Setting exposure compensation to "
* + desiredCompensation + " / " + (step * desiredCompensation));
* parameters.setExposureCompensation(desiredCompensation); } else {
* Log.i(TAG, "Camera does not support exposure compensation"); } } }
*/
}
/**
* Attempts to find a preview size that matches the provided width and height (which specify the
* dimensions of the encoded video). If it fails to find a match it just uses the default preview
* size.
*
* <p>TODO: should do a best-fit match.
*/
private static void choosePreviewSize(Camera.Parameters parms, int width, int height) {
// We should make sure that the requested MPEG size is less than the preferred
// size, and has the same aspect ratio.
Camera.Size ppsfv = parms.getPreferredPreviewSizeForVideo();
if (ppsfv != null) {
Log.d(TAG, "Camera preferred preview size for video is " + ppsfv.width + "x" + ppsfv.height);
}
// for (Camera.Size size : parms.getSupportedPreviewSizes()) {
// Log.d(TAG, "supported: " + size.width + "x" + size.height);
// }
for (Camera.Size size : parms.getSupportedPreviewSizes()) {
if (size.width == width && size.height == height) {
parms.setPreviewSize(width, height);
return;
}
}
Log.w(TAG, "Unable to set preview size to " + width + "x" + height);
if (ppsfv != null) {
parms.setPreviewSize(ppsfv.width, ppsfv.height);
}
// else use whatever the default size is
}
// Constructor
public AudioSynth(
final Camera camera,
AudioTrack redSynthesizer,
AudioTrack greenSynthesizer,
AudioTrack blueSynthesizer) {
mFinished = false;
mRGBData = null;
mRedSynthesizer = redSynthesizer;
mGreenSynthesizer = greenSynthesizer;
mBlueSynthesizer = blueSynthesizer;
redGeneratedSnd = new short[maxSamples];
greenGeneratedSnd = new short[maxSamples];
blueGeneratedSnd = new short[maxSamples];
mRedHistogram = new int[256];
mGreenHistogram = new int[256];
mBlueHistogram = new int[256];
mBinSquared = new double[256];
for (int bin = 0; bin < 256; bin++) {
mBinSquared[bin] = ((double) bin) * bin;
}
Camera.Parameters params = camera.getParameters();
mImageWidth = params.getPreviewSize().width;
mImageHeight = params.getPreviewSize().height;
int yStride = (int) Math.ceil(mImageWidth / 16.0) * 16;
int uvStride = (int) Math.ceil((yStride / 2) / 16.0) * 16;
int ySize = yStride * mImageHeight;
int uvSize = uvStride * mImageHeight / 2;
final int size = ySize + uvSize * 2;
mYUVBuffer = new byte[size];
camera.addCallbackBuffer(mYUVBuffer);
mRGBData = new int[mImageWidth * mImageHeight];
}
public void setupCameraParameters() {
Camera.Size optimalSize = getOptimalPreviewSize();
Camera.Parameters parameters = mCamera.getParameters();
parameters.setPreviewSize(optimalSize.width, optimalSize.height);
mCamera.setParameters(parameters);
adjustViewSize(optimalSize);
}
// Called when holder has changed
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
Camera.Parameters parameters = camera.getParameters();
List<String> focusModes = parameters.getSupportedFocusModes();
if (focusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO)) {
Log.d("camera", "focus_mode_auto");
parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
} else {
Log.d("camera", "focus_mode_macro");
parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_MACRO);
}
Log.d("camera", "orientation: " + getResources().getConfiguration().orientation);
int orientation = getResources().getConfiguration().orientation;
switch (orientation) {
case Surface.ROTATION_0:
Log.d("camera", "ROTATION_0");
camera.setDisplayOrientation(180);
break;
case Surface.ROTATION_90:
Log.d("camera", "ROTATION_90");
camera.setDisplayOrientation(90);
break;
case Surface.ROTATION_180:
Log.d("camera", "ROTATION_180");
camera.setDisplayOrientation(0);
break;
case Surface.ROTATION_270:
Log.d("camera", "ROTATION_270");
camera.setDisplayOrientation(270);
break;
}
camera.setParameters(parameters);
camera.startPreview();
}
/** Reads, one time, values from the camera that are needed by the app. */
void initFromCameraParameters(Camera camera) {
Camera.Parameters parameters = camera.getParameters();
previewFormat = parameters.getPreviewFormat();
previewFormatString = parameters.get("preview-format");
Log.d(TAG, "Default preview format: " + previewFormat + '/' + previewFormatString);
WindowManager manager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
Display display = manager.getDefaultDisplay();
screenResolution = new Point(display.getWidth(), display.getHeight());
Log.d(TAG, "Screen resolution: " + screenResolution);
// ���һЩ�ֻ���ɨ���BUG����������i9228��i9220.
Point screenResolutionForCamera = new Point();
screenResolutionForCamera.x = screenResolution.x;
screenResolutionForCamera.y = screenResolution.y;
// preview size is always something like 480*320, other 320*480
if (screenResolution.x < screenResolution.y) {
screenResolutionForCamera.x = screenResolution.y;
screenResolutionForCamera.y = screenResolution.x;
}
cameraResolution = getCameraResolution(parameters, screenResolutionForCamera);
// cameraResolution = getCameraResolution(parameters, screenResolution);
Log.d(TAG, "Camera resolution: " + screenResolution);
}
public void onPreviewFrame(byte[] data, Camera camera) {
Camera.Parameters parameters = camera.getParameters();
width = parameters.getPreviewSize().width;
height = parameters.getPreviewSize().height;
yuvImage = new YuvImage(data, ImageFormat.NV21, width, height, null);
looped += 1;
}
public void setCaptureQuality(int cameraType, String captureQuality) {
Camera camera = _cameras.get(cameraType);
if (camera == null) {
return;
}
Camera.Parameters parameters = camera.getParameters();
Camera.Size pictureSize = null;
switch (captureQuality) {
case RCTCameraModule.RCT_CAMERA_CAPTURE_QUALITY_LOW:
pictureSize = getSmallestSize(parameters.getSupportedPictureSizes());
break;
case RCTCameraModule.RCT_CAMERA_CAPTURE_QUALITY_MEDIUM:
List<Camera.Size> sizes = parameters.getSupportedPictureSizes();
pictureSize = sizes.get(sizes.size() / 2);
break;
case RCTCameraModule.RCT_CAMERA_CAPTURE_QUALITY_HIGH:
pictureSize =
getBestSize(
parameters.getSupportedPictureSizes(), Integer.MAX_VALUE, Integer.MAX_VALUE);
}
if (pictureSize != null) {
parameters.setPictureSize(pictureSize.width, pictureSize.height);
camera.setParameters(parameters);
}
}
private static Point getCameraResolution(Camera.Parameters parameters, Point screenResolution) {
String previewSizeValueString = parameters.get("preview-size-values");
// saw this on Xperia
if (previewSizeValueString == null) {
previewSizeValueString = parameters.get("preview-size-value");
}
Point cameraResolution = null;
if (CameraManager.mDesiredWidth == 0) CameraManager.mDesiredWidth = screenResolution.x;
if (CameraManager.mDesiredHeight == 0) CameraManager.mDesiredHeight = screenResolution.y;
List<Size> sizes = parameters.getSupportedPreviewSizes();
int minDif = 99999;
int minIndex = -1;
for (int i = 0; i < sizes.size(); i++) {
int dif =
Math.abs(sizes.get(i).width - CameraManager.mDesiredWidth)
+ Math.abs(sizes.get(i).height - CameraManager.mDesiredHeight);
if (dif < minDif) {
minDif = dif;
minIndex = i;
}
}
cameraResolution = new Point(sizes.get(minIndex).width, sizes.get(minIndex).height);
// cameraResolution = findBestPreviewSizeValue(previewSizeValueString,
// screenResolution);
return cameraResolution;
}
public void setFlashMode(int cameraType, int flashMode) {
Camera camera = _cameras.get(cameraType);
if (null == camera) {
return;
}
Camera.Parameters parameters = camera.getParameters();
String value = parameters.getFlashMode();
switch (flashMode) {
case RCTCameraModule.RCT_CAMERA_FLASH_MODE_AUTO:
value = Camera.Parameters.FLASH_MODE_AUTO;
break;
case RCTCameraModule.RCT_CAMERA_FLASH_MODE_ON:
value = Camera.Parameters.FLASH_MODE_ON;
break;
case RCTCameraModule.RCT_CAMERA_FLASH_MODE_OFF:
value = Camera.Parameters.FLASH_MODE_OFF;
break;
}
List<String> flashModes = parameters.getSupportedFlashModes();
if (flashModes != null && flashModes.contains(value)) {
parameters.setFlashMode(value);
camera.setParameters(parameters);
}
}
private void checkRearCamera() {
Camera camera = null;
try {
camera = Camera.open();
if (camera != null) {
assertAvailable(PackageManager.FEATURE_CAMERA);
Camera.Parameters params = camera.getParameters();
if (params.getSupportedFocusModes().contains(Parameters.FOCUS_MODE_AUTO)) {
assertAvailable(PackageManager.FEATURE_CAMERA_AUTOFOCUS);
} else {
assertNotAvailable(PackageManager.FEATURE_CAMERA_AUTOFOCUS);
}
if (params.getFlashMode() != null) {
assertAvailable(PackageManager.FEATURE_CAMERA_FLASH);
} else {
assertNotAvailable(PackageManager.FEATURE_CAMERA_FLASH);
}
} else {
assertNotAvailable(PackageManager.FEATURE_CAMERA);
assertNotAvailable(PackageManager.FEATURE_CAMERA_AUTOFOCUS);
assertNotAvailable(PackageManager.FEATURE_CAMERA_FLASH);
}
} finally {
if (camera != null) {
camera.release();
}
}
}
public int doZoom(float scale) {
synchronized (mCameraLock) {
if (mCamera == null) {
return 0;
}
int currentZoom = 0;
int maxZoom;
Camera.Parameters parameters = mCamera.getParameters();
if (!parameters.isZoomSupported()) {
Log.w(TAG, mContext.getString(R.string.zoom_not_supported));
return currentZoom;
}
maxZoom = parameters.getMaxZoom();
currentZoom = parameters.getZoom() + 1;
float newZoom;
if (scale > 1) {
newZoom = currentZoom + scale * (maxZoom / 10);
} else {
newZoom = currentZoom * scale;
}
currentZoom = Math.round(newZoom) - 1;
if (currentZoom < 0) {
currentZoom = 0;
} else if (currentZoom > maxZoom) {
currentZoom = maxZoom;
}
parameters.setZoom(currentZoom);
mCamera.setParameters(parameters);
return currentZoom;
}
}
private static Point getCameraResolution(Camera.Parameters parameters, Point screenResolution) {
String previewSizeValueString = parameters.get("preview-size-values");
// saw this on Xperia
if (previewSizeValueString == null) {
previewSizeValueString = parameters.get("preview-size-value");
}
Point cameraResolution = null;
if (previewSizeValueString != null) {
Log.d(TAG, "preview-size-values parameter: " + previewSizeValueString);
Log.d(TAG, "preview-size-values parameter: " + previewSizeValueString);
cameraResolution = findBestPreviewSizeValue(previewSizeValueString, screenResolution);
// cameraResolution = new Point(1280, 720);
Log.d(TAG, "BestPreviewSizeValue: " + cameraResolution);
}
if (cameraResolution == null) {
// Ensure that the camera resolution is a multiple of 8, as the screen may not be.
cameraResolution = new Point((screenResolution.x >> 3) << 3, (screenResolution.y >> 3) << 3);
}
return cameraResolution;
}
/**
* Generates a list of acceptable preview sizes. Preview sizes are not acceptable if there is not
* a corresponding picture size of the same aspect ratio. If there is a corresponding picture size
* of the same aspect ratio, the picture size is paired up with the preview size.
*
* <p>This is necessary because even if we don't use still pictures, the still picture size must
* be set to a size that is the same aspect ratio as the preview size we choose. Otherwise, the
* preview images may be distorted on some devices.
*/
private static List<SizePair> generateValidPreviewSizeList(Camera camera, Context context) {
Camera.Parameters parameters = camera.getParameters();
List<Camera.Size> supportedPreviewSizes = parameters.getSupportedPreviewSizes();
List<Camera.Size> supportedPictureSizes = parameters.getSupportedPictureSizes();
List<SizePair> validPreviewSizes = new ArrayList<>();
for (Camera.Size previewSize : supportedPreviewSizes) {
float previewAspectRatio = (float) previewSize.width / (float) previewSize.height;
// By looping through the picture sizes in order, we favor the higher resolutions.
// We choose the highest resolution in order to support taking the full resolution
// picture later.
for (Camera.Size pictureSize : supportedPictureSizes) {
float pictureAspectRatio = (float) pictureSize.width / (float) pictureSize.height;
if (Math.abs(previewAspectRatio - pictureAspectRatio) < ASPECT_RATIO_TOLERANCE) {
validPreviewSizes.add(new SizePair(previewSize, pictureSize));
break;
}
}
}
// If there are no picture sizes with the same aspect ratio as any preview sizes, allow all
// of the preview sizes and hope that the camera can handle it. Probably unlikely, but we
// still account for it.
if (validPreviewSizes.size() == 0) {
Log.w(TAG, context.getString(R.string.no_same_Aspect_ratio));
for (Camera.Size previewSize : supportedPreviewSizes) {
// The null picture size will let us know that we shouldn't set a picture size.
validPreviewSizes.add(new SizePair(previewSize, null));
}
}
return validPreviewSizes;
}
public void onPreviewFrame(byte[] data, Camera camera) {
Camera.Parameters parameters = camera.getParameters();
Camera.Size size = parameters.getPreviewSize();
Image barcode = new Image(size.width, size.height, "Y800");
barcode.setData(data);
int result = mScanner.scanImage(barcode);
if (result != 0) {
mCamera.cancelAutoFocus();
mCamera.setPreviewCallback(null);
mCamera.stopPreview();
mPreviewing = false;
SymbolSet syms = mScanner.getResults();
for (Symbol sym : syms) {
String symData = sym.getData();
if (!TextUtils.isEmpty(symData)) {
Intent dataIntent = new Intent();
dataIntent.putExtra(SCAN_RESULT, symData);
dataIntent.putExtra(SCAN_RESULT_TYPE, sym.getType());
setResult(Activity.RESULT_OK, dataIntent);
finish();
break;
}
}
}
}
private void doSetTorch(Camera.Parameters parameters, boolean newSetting, boolean safeMode) {
String flashMode;
if (newSetting) {
flashMode =
findSettableValue(
parameters.getSupportedFlashModes(),
Camera.Parameters.FLASH_MODE_TORCH,
Camera.Parameters.FLASH_MODE_ON);
} else {
flashMode =
findSettableValue(parameters.getSupportedFlashModes(), Camera.Parameters.FLASH_MODE_OFF);
}
if (flashMode != null) {
parameters.setFlashMode(flashMode);
}
/*
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
if (!prefs.getBoolean(PreferencesActivity.KEY_DISABLE_EXPOSURE, false)) {
if (!safeMode) {
ExposureInterface exposure = new ExposureManager().build();
exposure.setExposure(parameters, newSetting);
}
}
*/
}
public VideoHdrWidget(CameraManager cam, Context context) {
super(cam, context, R.drawable.ic_widget_placeholder); // TODO: Icon, video hdr
setVideoOnly(true);
// We cannot inflate from XML here, because there are device-specific keys and values
Camera.Parameters params = mCamManager.getParameters();
if (params == null) {
return;
}
if (params.get(KEY_SONY_VIDEO_HDR) != null) {
// Use Sony values
setKey(KEY_SONY_VIDEO_HDR);
addValue("off", R.drawable.ic_widget_hdr_off, context.getString(R.string.disabled));
addValue("on", R.drawable.ic_widget_hdr_on, context.getString(R.string.enabled));
} else if (params.get(KEY_QCOM_VIDEO_HDR) != null) {
// Use Qcom values
setKey(KEY_QCOM_VIDEO_HDR);
addValue("0", R.drawable.ic_widget_hdr_off, context.getString(R.string.disabled));
addValue("1", R.drawable.ic_widget_hdr_on, context.getString(R.string.enabled));
}
getToggleButton().setHintText(R.string.widget_videohdr);
}
private void initCamera() {
if (!isPreview) {
camera = Camera.open();
}
if (camera != null && !isPreview) {
streamIt = new StreamIt();
try {
Camera.Parameters parameters = camera.getParameters();
parameters.setPreviewSize(screenWidth, screenHeight); // 设置预览照片的大小
parameters.setPreviewFpsRange(20, 30); // 每秒显示20~30帧
parameters.setPictureFormat(ImageFormat.NV21); // 设置图片格式
parameters.setPictureSize(screenWidth, screenHeight); // 设置照片的大小
camera.setPreviewDisplay(surfaceHolder); // 通过SurfaceView显示取景画面
camera.setPreviewCallback(streamIt); // 设置回调的类
camera.startPreview(); // 开始预览
camera.autoFocus(null); // 自动对焦
} catch (Exception e) {
e.printStackTrace();
}
isPreview = true;
Thread postThread2 = new Thread(new postThread());
postThread2.start();
System.out.println("线程启动了@@@@@@@@@@@@@@@@@@@@@@@@@@");
}
}
public static void setBestExposure(Camera.Parameters parameters, boolean lightOn) {
int minExposure = parameters.getMinExposureCompensation();
int maxExposure = parameters.getMaxExposureCompensation();
float step = parameters.getExposureCompensationStep();
if ((minExposure != 0 || maxExposure != 0) && step > 0.0f) {
// Set low when light is on
float targetCompensation = lightOn ? MIN_EXPOSURE_COMPENSATION : MAX_EXPOSURE_COMPENSATION;
int compensationSteps = Math.round(targetCompensation / step);
float actualCompensation = step * compensationSteps;
// Clamp value:
compensationSteps = Math.max(Math.min(compensationSteps, maxExposure), minExposure);
if (parameters.getExposureCompensation() == compensationSteps) {
Log.i(
TAG,
"Exposure compensation already set to "
+ compensationSteps
+ " / "
+ actualCompensation);
} else {
Log.i(
TAG,
"Setting exposure compensation to " + compensationSteps + " / " + actualCompensation);
parameters.setExposureCompensation(compensationSteps);
}
} else {
Log.i(TAG, "Camera does not support exposure compensation");
}
}
@Override
public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i2, int i3) {
Log.e("ok", "surfaceChanged => w=" + i2 + ", h=" + i3);
// before changing the application orientation, you need to stop the preview, rotate and then
// start it again
if (surfaceHolder.getSurface() == null) // check if the surface is ready to receive camera data
return;
try {
mCamera.stopPreview();
} catch (Exception e) {
// this will happen when you are trying the camera if it's not running
}
// now, recreate the camera preview
try {
Camera.Parameters parameters = mCamera.getParameters();
List<String> focusModes = parameters.getSupportedFocusModes();
if (focusModes.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO)) {
parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
}
parameters.setPreviewSize(mPreviewSize.width, mPreviewSize.height);
mCamera.setParameters(parameters);
mCamera.setDisplayOrientation(90);
mCamera.startPreview(mHolder);
} catch (IOException e) {
Log.d("ERROR", "Camera error on surfaceChanged " + e.getMessage());
}
}
