还是这个接手项目，二维码扫描集成的是zxing，扫描界面的图像有明显的拉伸变形。
这种问题，根据以往的经验，一般是x，y轴错位引起的，处理好x，y轴的问题，一般可以解决问题。
由于这个问题，之前有很多人遇到，并分享在网上了，所以，我这里也就不需要重复造轮子了。
这里看了一篇博客：Android Zxing二维码扫描图片拉伸，用了上面的办法，
成功的解决图片拉伸问题。
解决方法如下：
修改CameraConfigurationManager.Java里面的initFromCameraParameters方法：
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);
//added
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);
}
