zxing 扫描二维码变形问题

修改 CameraConfigurationManager类中void initFromCameraParameters(Camera camera)方法；

如下：

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);

//    cameraResolution = getCameraResolution(parameters, screenResolution);

//    Log.d(TAG, "Camera resolution: " + screenResolution);

    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);