ZXing 2.2 掃描框豎屏修改

1、修改AndroidManifest.xml文件，將CaptureActivity的android:screenOrientation屬性改爲portrait
        android:screenOrientation="portrait"

2、在DecodeHandler.java中，修改decode方法
 PlanarYUVLuminanceSource source = CameraManager.get().buildLuminanceSource(data, width, height); 爲

byte[] rotatedData = new byte[data.length];
    for (int y = 0; y < height; y++) {
        for (int x = 0; x < width; x++)
            rotatedData[x * height + height - y - 1] = data[x + y * width];
    }
    int tmp = width;
    width = height;
    height = tmp;
    data = rotatedData; 
    PlanarYUVLuminanceSource source = activity.getCameraManager().buildLuminanceSource(data, width, height);

3、找到CameraManager.java 修改代碼如下

/*      rect.left = rect.left * cameraResolution.x / screenResolution.x;
      rect.right = rect.right * cameraResolution.x / screenResolution.x;
      rect.top = rect.top * cameraResolution.y / screenResolution.y;
      rect.bottom = rect.bottom * cameraResolution.y / screenResolution.y;
      */ 
      rect.left = rect.left * cameraResolution.y / screenResolution.x;
      rect.right = rect.right * cameraResolution.y / screenResolution.x;
      rect.top = rect.top * cameraResolution.x / screenResolution.y;
      rect.bottom = rect.bottom * cameraResolution.x / screenResolution.y;

4、找到CameraConfigurationManager.java，在setDesiredCameraParameters()在中的camera.setParameters(parameters);之前加入
  camera.setDisplayOrientation(90);

5、在CameraConfigurationManager.java裏找到initFromCameraParameters(Camera camera)方法，改爲：

 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();
      if (width < height) {
           int temp = width;
           width = height;
           height = temp;
    }
    screenResolution = new Point(height, width);
    Log.i(TAG, "Screen resolution: " + screenResolution);
    cameraResolution = findBestPreviewSizeValue(parameters, new Point(width, height));
    Log.i(TAG, "Camera resolution: " + cameraResolution);