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Java 类android.hardware.Camera.Parameters 实例源码

项目：Nird2    文件：CameraView.java    
@UiThread
private void setFocusMode(Parameters params) {
    List<String> focusModes = params.getSupportedFocusModes();
    if (LOG.isLoggable(INFO)) LOG.info("Focus modes: " + focusModes);
    if (focusModes.contains(FOCUS_MODE_CONTINUOUS_PICTURE)) {
        params.setFocusMode(FOCUS_MODE_CONTINUOUS_PICTURE);
    } else if (focusModes.contains(FOCUS_MODE_CONTINUOUS_VIDEO)) {
        params.setFocusMode(FOCUS_MODE_CONTINUOUS_VIDEO);
    } else if (focusModes.contains(FOCUS_MODE_EDOF)) {
        params.setFocusMode(FOCUS_MODE_EDOF);
    } else if (focusModes.contains(FOCUS_MODE_MACRO)) {
        params.setFocusMode(FOCUS_MODE_MACRO);
    } else if (focusModes.contains(FOCUS_MODE_AUTO)) {
        params.setFocusMode(FOCUS_MODE_AUTO);
    } else if (focusModes.contains(FOCUS_MODE_FIXED)) {
        params.setFocusMode(FOCUS_MODE_FIXED);
    }
}
项目：Nird2    文件：CameraView.java    
@UiThread
private void setFocusMode(Parameters params) {
    List<String> focusModes = params.getSupportedFocusModes();
    if (LOG.isLoggable(INFO)) LOG.info("Focus modes: " + focusModes);
    if (focusModes.contains(FOCUS_MODE_CONTINUOUS_PICTURE)) {
        params.setFocusMode(FOCUS_MODE_CONTINUOUS_PICTURE);
    } else if (focusModes.contains(FOCUS_MODE_CONTINUOUS_VIDEO)) {
        params.setFocusMode(FOCUS_MODE_CONTINUOUS_VIDEO);
    } else if (focusModes.contains(FOCUS_MODE_EDOF)) {
        params.setFocusMode(FOCUS_MODE_EDOF);
    } else if (focusModes.contains(FOCUS_MODE_MACRO)) {
        params.setFocusMode(FOCUS_MODE_MACRO);
    } else if (focusModes.contains(FOCUS_MODE_AUTO)) {
        params.setFocusMode(FOCUS_MODE_AUTO);
    } else if (focusModes.contains(FOCUS_MODE_FIXED)) {
        params.setFocusMode(FOCUS_MODE_FIXED);
    }
}
项目：Zxing    文件：CameraManager.java    
/**
 * 通过设置Camera关闭闪光灯
 * 
 * @param mCamera
 */
public void turnLightOff() {
    if (camera == null) {
        return;
    }
    Parameters parameters = camera.getParameters();
    if (parameters == null) {
        return;
    }
    List<String> flashModes = parameters.getSupportedFlashModes();
    String flashMode = parameters.getFlashMode();
    // Check if camera flash exists
    if (flashModes == null) {
        return;
    }
    // 闪光灯打开状态
    if (!Parameters.FLASH_MODE_OFF.equals(flashMode)) {
        // Turn off the flash
        if (flashModes.contains(Parameters.FLASH_MODE_OFF)) {
            parameters.setFlashMode(Parameters.FLASH_MODE_OFF);
            camera.setParameters(parameters);
        } else {
            Log.e(TAG, "FLASH_MODE_OFF not supported");
        }
    }
}
项目：QRCodeScanner    文件：BarcodeCameraConfig.java    
public BarcodeCameraConfig configPreviewSize2(int viewWidth, int viewHeight) {
    Parameters params = camera.getParameters();
    List<Size> sizes = params.getSupportedPreviewSizes();
    if (sizes == null || sizes.size() <= 0) {
        return this;
    }

    Size bestSize = null;
    int diff = Integer.MAX_VALUE;

    for (Size tmpSize : sizes) {
        int newDiff = Math.abs(tmpSize.width - viewWidth) + Math.abs(tmpSize.height - viewHeight);
        if (newDiff == 0) {
            bestSize = tmpSize;
            break;
        } else if (newDiff < diff) {
            bestSize = tmpSize;
            diff = newDiff;
        }
    }
    params.setPreviewSize(bestSize.width, bestSize.height);
    camera.setParameters(params);
    return this;
}
项目：PeSanKita-android    文件：CameraView.java    
@Override
public void onOrientationChanged(int orientation) {
  if (camera.isPresent() && orientation != ORIENTATION_UNKNOWN) {
    int newOutputOrientation = getCameraPictureRotation(orientation);

    if (newOutputOrientation != outputOrientation) {
      outputOrientation = newOutputOrientation;

      Camera.Parameters params = camera.get().getParameters();

      params.setRotation(outputOrientation);

      try {
        camera.get().setParameters(params);
      }
      catch (Exception e) {
        Log.e(TAG, "Exception updating camera parameters in orientation change", e);
      }
    }
  }
}
项目：Nird2    文件：CameraView.java    
@UiThread
private void surfaceChangedUi(SurfaceHolder holder, int w, int h) {
    if (LOG.isLoggable(INFO)) LOG.info("Surface changed: " + w + "x" + h);
    if (surface != null && surface != holder.getSurface()) {
        LOG.info("Releasing old surface");
        surface.release();
    }
    surface = holder.getSurface();
    surfaceWidth = w;
    surfaceHeight = h;
    if (camera == null) return; // We are stopped
    stopPreview();
    try {
        Parameters params = camera.getParameters();
        setPreviewSize(params);
        camera.setParameters(params);
        logCameraParameters();
    } catch (RuntimeException e) {
        LOG.log(WARNING, "Error setting preview size", e);
    }
    startPreview(holder);
}
项目：Nird2    文件：CameraView.java    
@UiThread
private void surfaceChangedUi(SurfaceHolder holder, int w, int h) {
    if (LOG.isLoggable(INFO)) LOG.info("Surface changed: " + w + "x" + h);
    if (surface != null && surface != holder.getSurface()) {
        LOG.info("Releasing old surface");
        surface.release();
    }
    surface = holder.getSurface();
    surfaceWidth = w;
    surfaceHeight = h;
    if (camera == null) return; // We are stopped
    stopPreview();
    try {
        Parameters params = camera.getParameters();
        setPreviewSize(params);
        camera.setParameters(params);
        logCameraParameters();
    } catch (RuntimeException e) {
        LOG.log(WARNING, "Error setting preview size", e);
    }
    startPreview(holder);
}
项目：mao-android    文件：CameraRenderer.java    
public void setUpSurfaceTexture(final Camera camera) {
    runOnDraw(new Runnable() {
        @Override
        public void run() {
            try {
                Camera.Parameters param = camera.getParameters();
                param.setPreviewSize(1280, 720);//TODO
                if (param.getSupportedFocusModes().contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE)) {
                    param.setFocusMode(Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
                }
                camera.setParameters(param);
                int[] textures = new int[1];
                GLES20.glGenTextures(1, textures, 0);
                mSurfaceTexture = new SurfaceTexture(textures[0]);
                camera.setPreviewTexture(mSurfaceTexture);
                camera.setPreviewCallback(CameraRenderer.this);
                camera.startPreview();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    });
}
项目：mao-android    文件：CameraRenderer.java    
@Override
public void onSurfaceChanged(GL10 gl, int width, int height) {
    GLES20.glViewport(0, 0, width, height);
    try {
        mCamera.setPreviewTexture(mSurfaceTexture);
        Camera.Parameters param = mCamera.getParameters();
        param.setPreviewSize(1920, 1080);//TODO
        if (param.getSupportedFocusModes().contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE)) {
            param.setFocusMode(Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
        }
        mCamera.setParameters(param);
        mCamera.startPreview();
    } catch (IOException e) {
        e.printStackTrace();
    }
}
项目：treetracker-android    文件：CameraPreview.java    
@SuppressWarnings("deprecation")
    public CameraPreview(Context context, Camera camera) {
        super(context);
        mCamera = camera;


        Parameters parameters = mCamera.getParameters();
        parameters.setRotation(90);
        mCamera.setParameters(parameters);
//        mCamera.setParameters())
        // Install a SurfaceHolder.Callback so we get notified when the
        // underlying surface is created and destroyed.
        mHolder = getHolder();
        mHolder.addCallback(this);
        // deprecated setting, but required on Android versions prior to 3.0
        mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

    }
项目：boohee_v5.6    文件：BarcodeScannerView.java    
public void setFlash(boolean flag) {
    if (this.mCamera != null && CameraUtils.isFlashSupported(this.mCamera)) {
        Parameters parameters = this.mCamera.getParameters();
        if (flag) {
            if (!parameters.getFlashMode().equals("torch")) {
                parameters.setFlashMode("torch");
            } else {
                return;
            }
        } else if (!parameters.getFlashMode().equals("off")) {
            parameters.setFlashMode("off");
        } else {
            return;
        }
        this.mCamera.setParameters(parameters);
    }
}
项目：Cable-Android    文件：CameraView.java    
@Override
public void onOrientationChanged(int orientation) {
  if (camera.isPresent() && orientation != ORIENTATION_UNKNOWN) {
    int newOutputOrientation = getCameraPictureRotation(orientation);

    if (newOutputOrientation != outputOrientation) {
      outputOrientation = newOutputOrientation;

      Camera.Parameters params = camera.get().getParameters();

      params.setRotation(outputOrientation);

      try {
        camera.get().setParameters(params);
      }
      catch (Exception e) {
        Log.e(TAG, "Exception updating camera parameters in orientation change", e);
      }
    }
  }
}
项目：GCSApp    文件：RecorderVideoActivity.java    
@SuppressLint("NewApi")
private boolean initCamera() {
    try {
        if (frontCamera == 0) {
            mCamera = Camera.open(CameraInfo.CAMERA_FACING_BACK);
        } else {
            mCamera = Camera.open(CameraInfo.CAMERA_FACING_FRONT);
        }
        Parameters camParams = mCamera.getParameters();
        mCamera.lock();
        mSurfaceHolder = mVideoView.getHolder();
        mSurfaceHolder.addCallback(this);
        mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        mCamera.setDisplayOrientation(90);

    } catch (RuntimeException ex) {
        EMLog.e("video", "init Camera fail " + ex.getMessage());
        return false;
    }
    return true;
}
项目：QRCodeScanner    文件：BarcodeCameraConfig.java    
public BarcodeCameraConfig configFocusMode() {
    try {
        Parameters parameters = camera.getParameters();
        String focusMode = findValue(parameters.getSupportedFocusModes(),
                Parameters.FOCUS_MODE_AUTO,
                Parameters.FOCUS_MODE_MACRO);

        if (focusMode != null) {
            parameters.setFocusMode(focusMode);
        }

        camera.setParameters(parameters);
    } catch (Exception e) {
    }

    return this;
}
项目：SmartMath    文件：CameraPreview.java    
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
    try {
    if (mCamera != null) {
      // Now that the size is known, set up the camera parameters and begin
      // the preview.
      Camera.Parameters p = mCamera.getParameters();

      p.setPreviewSize(mPreviewSize.width, mPreviewSize.height);
      requestLayout();

      setCameraParams(mCamera, p);
      startPreview();
    }
    } catch (Exception exception) {
        Log.e(TAG, "Exception caused by surfaceChanged()", exception);
    }
}
项目：SmartMath    文件：CameraPreview.java    
public void startPreview() {
    if (mCamera != null) {
        // set flash mode
     if (msbSupportFlash) {
      Camera.Parameters p = mCamera.getParameters();
      if (((ActivityQuickRecog)getContext()).isTurnOnFlashChecked()) {
        p.setFlashMode(Parameters.FLASH_MODE_TORCH);
      } else {
        p.setFlashMode(Parameters.FLASH_MODE_OFF);
      }
      setCameraParams(mCamera, p);
     }
     // set call back.
     mCamera.setPreviewCallback(this);
     // start preview.
     mCamera.startPreview();    

    }
    ((ActivityQuickRecog)getContext()).onStartPreview();
}
项目：ROLF-EV3    文件：VideoStream.java    
/** Turns the LED on or off if phone has one. */
public synchronized void setFlashState(boolean state) {
    Log.d("flash", "flash called");
    // If the camera has already been opened, we apply the change immediately
    if (mCamera != null) {
        Log.d("flash", "camera not null");
        if (mStreaming && mMode == MODE_MEDIARECORDER_API) {
            lockCamera();
        }
        Parameters parameters = mCamera.getParameters();

        // We test if the phone has a flash
        if (parameters.getFlashMode()==null) {
            // The phone has no flash or the choosen camera can not toggle the flash
            throw new RuntimeException("Can't turn the flash on !");
        } else {
            parameters.setFlashMode(state?Parameters.FLASH_MODE_TORCH:Parameters.FLASH_MODE_OFF);
            try {
                mCamera.setParameters(parameters);
                mFlashEnabled = state;
            } catch (RuntimeException e) {
                mFlashEnabled = false;
                throw new RuntimeException("Can't turn the flash on !");
            } finally {
                if (mStreaming && mMode == MODE_MEDIARECORDER_API) {
                    unlockCamera();
                }
            }
        }
    } else {
        mFlashEnabled = state;
    }
}
项目：VideoCamera    文件：CameraWrapper.java    
@TargetApi(VERSION_CODES.HONEYCOMB)
protected List<Size> getSupportedVideoSizes(int currentSdkInt) {
    Parameters params = mNativeCamera.getNativeCameraParameters();

    List<Size> supportedVideoSizes;
    if (currentSdkInt < Build.VERSION_CODES.HONEYCOMB) {
        CLog.e(CLog.CAMERA, "Using supportedPreviewSizes iso supportedVideoSizes due to API restriction");
        supportedVideoSizes = params.getSupportedPreviewSizes();
    } else if (params.getSupportedVideoSizes() == null) {
        CLog.e(CLog.CAMERA, "Using supportedPreviewSizes because supportedVideoSizes is null");
        supportedVideoSizes = params.getSupportedPreviewSizes();
    } else {
        supportedVideoSizes = params.getSupportedVideoSizes();
    }

    return supportedVideoSizes;
}
项目：AndroidCamera    文件：ActivityCamera.java    
private void setUpCamera(final int id) {
    mCameraInstance = getCameraInstance(id);
    Parameters parameters = mCameraInstance.getParameters();
    // TODO adjust by getting supportedPreviewSizes and then choosing
    // the best one for screen size (best fill screen)
    if (parameters.getSupportedFocusModes().contains(
            Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE)) {
        parameters.setFocusMode(Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
    }
    mCameraInstance.setParameters(parameters);

    int orientation = mCameraHelper.getCameraDisplayOrientation(
            ActivityCamera.this, mCurrentCameraId);
    CameraInfo2 cameraInfo = new CameraInfo2();
    mCameraHelper.getCameraInfo(mCurrentCameraId, cameraInfo);
    boolean flipHorizontal = cameraInfo.facing == CameraInfo.CAMERA_FACING_FRONT;
    mGPUImage.setUpCamera(mCameraInstance, orientation, flipHorizontal, false);
}
项目：LLApp    文件：CameraView.java    
/**
 *  设置闪光灯类型
 *  @param flashMode
 */
@Override
public void setFlashMode(FlashMode flashMode) {
    if(mCamera==null) return;
    mFlashMode = flashMode;
    Parameters parameters=mCamera.getParameters();
    switch (flashMode) {
    case ON:
        parameters.setFlashMode(Parameters.FLASH_MODE_ON);
        break;
    case AUTO:
        parameters.setFlashMode(Parameters.FLASH_MODE_AUTO);
        break;
    case TORCH:
        parameters.setFlashMode(Parameters.FLASH_MODE_TORCH);
        break;
    default:
        parameters.setFlashMode(Parameters.FLASH_MODE_OFF);
        break;
    }
    mCamera.setParameters(parameters);
}
项目：LLApp    文件：CameraView.java    
/**
 *  设置相机缩放级别
 *  @param zoom
 */
@Override
public void setZoom(int zoom){
    if(mCamera==null) return;
    Parameters parameters;
    //注意此处为录像模式下的setZoom方式。在Camera.unlock之后，调用getParameters方法会引起android框架底层的异常
    //stackoverflow上看到的解释是由于多线程同时访问Camera导致的冲突，所以在此使用录像前保存的mParameters。
    if(mParameters!=null)
        parameters=mParameters;
    else {
        parameters=mCamera.getParameters();
    }

    if(!parameters.isZoomSupported()) return;
    parameters.setZoom(zoom);
    mCamera.setParameters(parameters);
    mZoom=zoom;
}
项目：LLApp    文件：CameraView.java    
/**
 *   根据当前朝向修改保存图片的旋转角度
 */
private void updateCameraOrientation(){
    if(mCamera!=null){
        Parameters parameters = mCamera.getParameters();
        //rotation参数为 0、90、180、270。水平方向为0。
        int rotation=90+mOrientation==360?0:90+mOrientation;
        //前置摄像头需要对垂直方向做变换，否则照片是颠倒的
        if(mIsFrontCamera){
            if(rotation==90) rotation=270;
            else if (rotation==270) rotation=90;
        }
        parameters.setRotation(rotation);//生成的图片转90°
        //预览图片旋转90°
        mCamera.setDisplayOrientation(90);//预览转90°
        mCamera.setParameters(parameters);
    }
}
项目：BigApp_Discuz_Android    文件：FlashlightManager.java    
public static void setFlashLightNormal(boolean active) {

        if (camera == null)
            camera = getCamera();


        Parameters params = camera.getParameters();
        if (active) {
            params.setFlashMode(Parameters.FLASH_MODE_TORCH);
            camera.setParameters(params);
            camera.startPreview(); // 开始亮灯;
        } else {
            params.setFlashMode(Parameters.FLASH_MODE_OFF);
            camera.stopPreview(); // 关掉亮灯
            camera.release(); // 关掉照相机
            camera =null;
        }

        ZogUtils.printLog(FlashlightManager.class, "setFlashLightNormal active:" + active);
    }
项目：cloudturbine    文件：CTandroidAV.java    
/**
 * A safe way to get an instance of the Camera object.
 */
public Camera getCameraInstance() {
    Camera c = null;
    try {
        c = Camera.open(cameraId); // attempt to get a Camera instance
    } catch (Exception e) {
        Log.e(TAG, "Error:  Camera not available!");
        // Camera is not available (in use or does not exist)
    }

    Parameters params = c.getParameters();
    params.setFlashMode(Parameters.FLASH_MODE_OFF);
    params.setPictureFormat(ImageFormat.JPEG);
    params.setJpegQuality(50);            // 1-100, 100 best
    c.setParameters(params);

    return c; // returns null if camera is unavailable
}
项目：DataDrivenBP    文件：BPActivity.java    
private void startPreview() {
    if (myCamera != null) {
        myCamera.stopPreview();
    } else {
        myCamera = getCameraInstance();
    }
    Parameters parameters = myCamera.getParameters();
    if (canOpenFlash) {
        if (camRecordEnabled) {
            parameters.setFlashMode(Parameters.FLASH_MODE_TORCH);
        }

    } else {
        parameters.setFlashMode(Parameters.FLASH_MODE_OFF);
    }

    parameters.setPreviewFormat(ImageFormat.NV21);
    myCamera.setParameters(parameters);
    myCamera.setPreviewCallbackWithBuffer(new MyPreview());
    myCamera.addCallbackBuffer(mCallbackBuf);
    myCamera.startPreview();
}
项目：JCL    文件：JCL_Camera.java    
public boolean prepare() {
        try {
            f = new SurfaceTexture(0);

//            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1) {
//                f.setDefaultBufferSize(10000, 10000);
//            }
           // SurfaceHolder h = new SurfaceView(JCL_ApplicationContext.getContext()).getHolder();
            //mCamera.setPreviewDisplay(h);
            mCamera.setPreviewTexture(f);
        } catch (IOException e1) {
            Log.e("JCLCAMERA", e1.getMessage());
            return false;
        }

        Parameters params = mCamera.getParameters();
        params.setPreviewSize(width, height);
        params.setPictureSize(width, height);

        params.setJpegQuality(50);
        params.setFlashMode(Parameters.FLASH_MODE_OFF);
        params.setPictureFormat(ImageFormat.JPEG);
        mCamera.setParameters(params);
        return true;
    }
项目：JCL    文件：JCL_Camera.java    
private static Object[] getMaxResolutionOnCamera() {
    Camera mCamera = getCameraInstance();
    Camera.Parameters param;
    param = mCamera.getParameters();

    Camera.Size bestSize = null;
    List<Camera.Size> sizeList = mCamera.getParameters().getSupportedPreviewSizes();
    bestSize = sizeList.get(0);
    for (int i = 1; i < sizeList.size(); i++) {
        if ((sizeList.get(i).width * sizeList.get(i).height) > (bestSize.width * bestSize.height)) {
            bestSize = sizeList.get(i);
        }
    }

    List<Integer> supportedPreviewFormats = param.getSupportedPreviewFormats();
    Iterator<Integer> supportedPreviewFormatsIterator = supportedPreviewFormats.iterator();
    while (supportedPreviewFormatsIterator.hasNext()) {
        Integer previewFormat = supportedPreviewFormatsIterator.next();
        if (previewFormat == ImageFormat.YV12) {
            param.setPreviewFormat(previewFormat);
        }
    }

    mCamera.release();
    return  new Object[]{bestSize.width, bestSize.height};
}
项目：Android_CCTV    文件：VideoStream.java    
protected synchronized void updateCamera() throws RuntimeException {
    if (mPreviewStarted) {
        mPreviewStarted = false;
        mCamera.stopPreview();
    }

    Parameters parameters = mCamera.getParameters();
    mQuality = VideoQuality.determineClosestSupportedResolution(parameters, mQuality);
    int[] max = VideoQuality.determineMaximumSupportedFramerate(parameters);
    parameters.setPreviewFormat(mCameraImageFormat);
    parameters.setPreviewSize(mQuality.resX, mQuality.resY);
    parameters.setPreviewFpsRange(max[0], max[1]);

    try {
        mCamera.setParameters(parameters);
        mCamera.setDisplayOrientation(mOrientation);
        mCamera.startPreview();
        mPreviewStarted = true;
    } catch (RuntimeException e) {
        destroyCamera();
        throw e;
    }
}
项目：ChatDemoUI3.0    文件：RecorderVideoActivity.java    
@SuppressLint("NewApi")
private boolean initCamera() {
    try {
        if (frontCamera == 0) {
            mCamera = Camera.open(CameraInfo.CAMERA_FACING_BACK);
        } else {
            mCamera = Camera.open(CameraInfo.CAMERA_FACING_FRONT);
        }
        Camera.Parameters camParams = mCamera.getParameters();
        mCamera.lock();
        mSurfaceHolder = mVideoView.getHolder();
        mSurfaceHolder.addCallback(this);
        mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        mCamera.setDisplayOrientation(90);

    } catch (RuntimeException ex) {
        EMLog.e("video", "init Camera fail " + ex.getMessage());
        return false;
    }
    return true;
}
项目：Rocket.Chat-android    文件：CameraManager.java    
public void setupCameraAndStartPreview(SurfaceHolder sf, Size sz, int displayRotation) {
    stopCameraPreview();

    cameraRotationDegree = CameraHelper.setCameraDisplayOrientation(defaultCameraID, camera, displayRotation);

    chooseCamcorderProfile(sz);

    // tweak profile
    profile.fileFormat = MediaRecorder.OutputFormat.THREE_GPP;
    profile.audioSampleRate = 16000;
    profile.audioChannels = 1;
    profile.audioBitRate = 96000;

    Parameters param = camera.getParameters();

    param.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
    param.setPreviewSize(profile.videoFrameWidth, profile.videoFrameHeight);
       if (Build.VERSION.SDK_INT >= 14)
           param.setRecordingHint(true);
    camera.setParameters(param);

    if (setDisplay(sf)) {
        startCameraPreview();
    }   
}
项目：RemoteEye    文件：VideoStream.java    
protected synchronized void updateCamera() throws RuntimeException {
    if (mPreviewStarted) {
        mPreviewStarted = false;
        mCamera.stopPreview();
    }

    Parameters parameters = mCamera.getParameters();
    mQuality = VideoQuality.determineClosestSupportedResolution(parameters, mQuality);
    int[] max = VideoQuality.determineMaximumSupportedFramerate(parameters);
    parameters.setPreviewFormat(mCameraImageFormat);
    parameters.setPreviewSize(mQuality.resX, mQuality.resY);
    parameters.setPreviewFpsRange(max[0], max[1]);

    try {
        mCamera.setParameters(parameters);
        mCamera.setDisplayOrientation(mOrientation);
        mCamera.startPreview();
        mPreviewStarted = true;
    } catch (RuntimeException e) {
        destroyCamera();
        throw e;
    }
}
项目：iTester    文件：FlashlightManager.java    
/** 
 * ͨ������Camera������� 
 * @param mCamera 
 */  

public static boolean hasFlashlight(Camera mCamera)
{
    if (mCamera == null) {  
        return false;  
    }  
    Parameters parameters = mCamera.getParameters();  
    if (parameters == null) {  
        return false;  
    }  
List<String> flashModes = parameters.getSupportedFlashModes();  
    // Check if camera flash exists  
    if (flashModes == null) {  
        // Use the screen as a flashlight (next best thing)  
        return false;  
    }
    else return true;
}
项目：iTester    文件：FlashlightManager.java    
public static void turnLightOn(Camera mCamera) {  
    if (mCamera == null) {  
        return;  
    }  
    Parameters parameters = mCamera.getParameters();  
    if (parameters == null) {  
        return;  
    }  
List<String> flashModes = parameters.getSupportedFlashModes();  
    // Check if camera flash exists  
    if (flashModes == null) {  
        // Use the screen as a flashlight (next best thing)  
        return;  
    }  
    String flashMode = parameters.getFlashMode();  
    Log.i(TAG, "Flash mode: " + flashMode);  
    Log.i(TAG, "Flash modes: " + flashModes);  
    if (!Parameters.FLASH_MODE_TORCH.equals(flashMode)) {  
        // Turn on the flash  
        if (flashModes.contains(Parameters.FLASH_MODE_TORCH)) {  
            parameters.setFlashMode(Parameters.FLASH_MODE_TORCH);  
            mCamera.setParameters(parameters);  
        } else {  
        }  
    }  
}
项目：sdkdemoapp3.0_android    文件：RecorderVideoActivity.java    
@SuppressLint("NewApi")
private boolean initCamera() {
    try {
        if (frontCamera == 0) {
            mCamera = Camera.open(CameraInfo.CAMERA_FACING_BACK);
        } else {
            mCamera = Camera.open(CameraInfo.CAMERA_FACING_FRONT);
        }
        Camera.Parameters camParams = mCamera.getParameters();
        mCamera.lock();
        mSurfaceHolder = mVideoView.getHolder();
        mSurfaceHolder.addCallback(this);
        mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        mCamera.setDisplayOrientation(90);

    } catch (RuntimeException ex) {
        EMLog.e("video", "init Camera fail " + ex.getMessage());
        return false;
    }
    return true;
}
项目：DeviceConnect-Android    文件：CameraOverlay.java    
/**
 * フラッシュライト消灯.
 */
public synchronized void turnOffFlashLight() {
    if (mCamera != null && isFlashLightState()) {
        Parameters p = mCamera.getParameters();
        p.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);
        mCamera.setParameters(p);

        if (!isShow()) {
            mCamera.stopPreview();
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                try {
                    mCamera.setPreviewTexture(null);
                } catch (IOException e) {
                    if (BuildConfig.DEBUG) {
                        e.printStackTrace();
                    }
                }
            }
            mCamera.release();
            mParams = null;
            mCamera = null;
        }
    }
    mFlashLightState = false;
    mUseFlashLight = false;
}
项目：GuessMusic    文件：Light.java    
private void openlight() {
    try {
        playSounds(R.raw.click);// �����ť������
        ca = Camera.open(); // �������
        pa = ca.getParameters();
        pa.setFlashMode(Parameters.FLASH_MODE_TORCH);// ѡ���ֵ�Ͳģʽ
        ca.setParameters(pa);
        ca.autoFocus(new Camera.AutoFocusCallback() { // �Զ��Խ������ӳɹ���
            public void onAutoFocus(boolean success, Camera camera) {
            }
        });
        ca.startPreview();
        state = false;
        b.setBackground(getResources().getDrawable(R.drawable.on));
    } catch (Exception e) {
    }
}
项目：WiCamera3D    文件：Util.java    
public static void setRotationParameter(Parameters parameters,
            int cameraId, int orientation) {
        // See android.hardware.Camera.Parameters.setRotation for
        // documentation.
        int rotation = 0;
        if (orientation != OrientationEventListener.ORIENTATION_UNKNOWN) {
             CameraInfo info =
             CameraHolder.instance().getCameraInfo()[cameraId];
//          CameraInfo info = new CameraInfo();
//          Camera.getCameraInfo(cameraId, info);
            if (info.facing == CameraInfo.CAMERA_FACING_FRONT) {
                rotation = (info.orientation - orientation + 360) % 360;
            } else { // back-facing camera
                rotation = (info.orientation + orientation) % 360;
            }
        }
        parameters.setRotation(rotation);
    }
项目：PerchBroadcast-Android-SDK    文件：CameraEncoder.java    
/**
 * Resets per-recording state. This excludes {@link EglStateSaver},
 * which should be re-used across recordings made by this CameraEncoder instance.
 *
 * @param config the desired parameters for the next recording.
 */
private void init(@NonNull SessionConfig config) {
    mEncodedFirstFrame = false;
    mReadyForFrames = false;
    mRecording = false;
    mEosRequested = false;

    mCurrentCamera = -1;
    mDesiredCamera = Camera.CameraInfo.CAMERA_FACING_BACK;

    mCurrentFlash = Parameters.FLASH_MODE_OFF;
    mDesiredFlash = null;

    mCurrentFilter = -1;
    mNewFilter = Filters.FILTER_NONE;

    mThumbnailRequested = false;
    mThumbnailRequestedOnFrame = -1;

    mSessionConfig = config;
}
项目：WiCamera3D    文件：CameraView.java    
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
    Camera.Parameters parameters = mCamera.getParameters();

    List<Size> sizes = parameters.getSupportedPreviewSizes();
    Size optimalSize = getOptimalPreviewSize(sizes, w, h);
    parameters.setPreviewSize(640, 480);
    String s = String.format("surface w: %d  h: %d", w, h);
    mScreenWidth = w;
    mScreenHeight = h;
    Log.i("info", s);

    // 创建用于预览合成的图片
    mbmp_previewL = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);// 创建bitmap对象
    mBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);

    // mCamera.setParameters(parameters);
    mCamera.startPreview();

}
项目：easyLight    文件：FlashlightHolder.java    
public synchronized void close()
{
    try{
        if(mCam == null) {
            return;
        }
        mCamParams.setFlashMode(Parameters.FLASH_MODE_OFF);
        mCam.setParameters(mCamParams);
        mCam.setPreviewCallback(null);
        mCam.stopPreview();
        mCam.release();
        mCam = null;
        mInstance = null;
    } catch(Exception e)
    {
         Log.d(Utils.APPNAME, "Exception closing flashlight " + e.getMessage());
    }
}