android.hardware.Camera#setPreviewDisplay ( )源码实例Demo

下面列出了android.hardware.Camera#setPreviewDisplay ( ) 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。

源代码1 项目： LLApp 文件： CameraManager.java

/**
 * 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 void openDriver(SurfaceHolder holder) throws IOException {
	Camera theCamera = camera;
	if (theCamera == null) {
		theCamera = Camera.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;
		}
	}
	configManager.setDesiredCameraParameters(theCamera);

	SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
	reverseImage = prefs.getBoolean(KEY_REVERSE_IMAGE, false);
}

源代码2 项目： android-apps 文件： CameraManager.java

/**
 * 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 void openDriver(SurfaceHolder holder) throws IOException {
  Camera theCamera = camera;
  if (theCamera == null) {
    theCamera = Camera.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;
    }
  }
  configManager.setDesiredCameraParameters(theCamera);

  SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
  reverseImage = prefs.getBoolean(PreferencesActivity.KEY_REVERSE_IMAGE, false);
}

源代码3 项目： android-quick-response-code 文件： CameraManager.java

/**
 * 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 void openDriver(SurfaceHolder holder) throws IOException {
    Camera theCamera = camera;
    if (theCamera == null) {
        theCamera = Camera.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;
        }
    }
    configManager.setDesiredCameraParameters(theCamera);
}

源代码4 项目： Android 文件： CameraManager.java

/**
 * Initialize the camera
 */
public Camera initCamera(Activity activity, SurfaceHolder viewHolder) {
    this.viewHolder = viewHolder;
    Camera mCamera = getCameraInstance(0);
    try {
        setParametersCamera(activity, mCamera);
        // Determine whether to support flash
        List<String> features = mCamera.getParameters().getSupportedFlashModes();
        if (null == features || features.contains(Camera.Parameters.FLASH_MODE_ON)) {
            isLighting = false;
            isSupportedLight = true;
        }
        mCamera.setPreviewDisplay(viewHolder);
        mCamera.startPreview();
    } catch (Exception e) {
        e.printStackTrace();
    }
    return mCamera;
}

源代码5 项目： codeexamples-android 文件： CameraFragment.java

public void switchCamera(Camera camera) {
    setCamera(camera);
    try {
        camera.setPreviewDisplay(mHolder);
    } catch (IOException exception) {
        Log.e(TAG, "IOException caused by setPreviewDisplay()", exception);
    }
}

源代码6 项目： camera2QRcodeReader 文件： CameraManager.java

/**
 * 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, int viewWidth, int viewHeight) 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, viewWidth, viewHeight);
    }

    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");
            }
        }
    }

}

源代码7 项目： CameraView 文件： JCameraView.java

private void setStartPreview(Camera camera, SurfaceHolder holder) {
    try {
        Camera.Parameters parameters = mCamera.getParameters();
        parameters.setPictureFormat(ImageFormat.JPEG);
        List<Camera.Size> sizeList = parameters.getSupportedPreviewSizes();//获取所有支持的camera尺寸
        Iterator<Camera.Size> itor = sizeList.iterator();
        while (itor.hasNext()) {
            Camera.Size cur = itor.next();
            Log.i("CJT", "所有的  width = " + cur.width + " height = " + cur.height);
            if (cur.width >= width&& cur.height >= height) {
                width = cur.width;
                height = cur.height;
            }
        }
        Log.i("size", "width : height" + width + " : " + height + " ==== " + getWidth() + " : " + getHeight());
        parameters.setPreviewSize(width, height);//把camera.size赋值到parameters
        parameters.setPictureSize(width, height);
        parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
        camera.setParameters(parameters);

        camera.setPreviewDisplay(holder);
        camera.setDisplayOrientation(90);
        camera.startPreview();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

源代码8 项目： YZxing 文件： CameraManager.java

/**
 * 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
                    , requestedFramingRectTopPadding > 0 ? requestedFramingRectTopPadding : -1);
            requestedFramingRectWidth = 0;
            requestedFramingRectHeight = 0;
        }
    }

    Camera cameraObject = theCamera.getCamera();
    try {
        configManager.setDesiredCameraParameters(theCamera, false);
    } catch (RuntimeException re) {
    }
    cameraObject.setPreviewDisplay(holder);

}

源代码9 项目： androidtestdebug 文件： CameraFragment.java

public void switchCamera(Camera camera) {
    setCamera(camera);
    try {
        camera.setPreviewDisplay(mHolder);
    } catch (IOException exception) {
        Log.e(TAG, "IOException caused by setPreviewDisplay()", exception);
    }
    Camera.Parameters parameters = camera.getParameters();
    parameters.setPreviewSize(mPreviewSize.width, mPreviewSize.height);
    requestLayout();

    camera.setParameters(parameters);
}

源代码10 项目： codeexamples-android 文件： CameraFragment.java

public void switchCamera(Camera camera) {
    setCamera(camera);
    try {
        camera.setPreviewDisplay(mHolder);
    } catch (IOException exception) {
        Log.e(TAG, "IOException caused by setPreviewDisplay()", exception);
    }
}

源代码11 项目： AndroidWallet 文件： CameraManager.java

/**
 * 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");
			}
		}
	}

}

源代码12 项目： ZXingProject 文件： CameraManager.java

/**
 * 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");
			}
		}
	}

}

源代码13 项目： ScanZbar 文件： CameraManager.java

/**
 * Opens the camera driver and initializes the hardware parameters.
 * <p>
 * <p>
 * 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 = Camera.open();
        if (theCamera == null) {
            throw new IOException();
        }
        camera = theCamera;
    }
    // 设置摄像头预览view
    theCamera.setPreviewDisplay(holder);

    if (!initialized) {
        initialized = true;
        configManager.initFromCameraParameters(theCamera);
    }

    Camera.Parameters parameters = theCamera.getParameters();
    String parametersFlattened = parameters == null ? null : parameters.flatten(); // Save
    // 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");
            }
        }
    }

}

源代码14 项目： zxingfragmentlib 文件： CameraManager.java

/**
 * 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);
    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");
      }
    }
  }

}

源代码15 项目： moVirt 文件： CameraManager.java

/**
 * 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 = OpenCameraInterface.open(requestedCameraId);
        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");
            }
        }
    }
}

源代码16 项目： ScanZxing 文件： CameraManager.java

/**
 * 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);
		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");
			}
		}
	}

}

源代码17 项目： AndroidWebServ 文件： CameraManager.java

/**
 * 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");
            }
        }
    }

}

源代码18 项目： Study_Android_Demo 文件： CameraManager.java

/**
 * 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
    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);

}

源代码19 项目： BarcodeScanner 文件： CameraManager.java

/**
 * 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) {
		// 获取手机背面的摄像头
		theCamera = OpenCameraInterface.open();
		if (theCamera == null) {
			throw new IOException();
		}
		camera = theCamera;
	}

	// 设置摄像头预览view
	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");
			}
		}
	}

}

源代码20 项目： BarcodeEye 文件： CameraManager.java

/**
 * 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.
 * @throws InterruptedException
 */
public synchronized void openDriver(SurfaceHolder holder)
        throws IOException, InterruptedException {
    Camera theCamera = camera;
    if (theCamera == null) {
        theCamera = OpenCameraInterface.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");
            }
        }
    }

}