（求助）本地Android源码与网上他人文章所述不一样

向大家请教个问题，还望大家不吝赐教。

我之前通过git在https://android.googlesource.com/ 下载了
Android的部分代码，在阅读代码过程中，发现与网上他人
分析的代码流程及贴出的代码片段很不同。

请问是版本问题吗？如何知道自己的代码版本？

我本地： \platform\frameworks\av\camera\camera.cpp里面的connect为：

sp<Camera> Camera::connect(int cameraId, const String16& clientPackageName,
        int clientUid)
{
    return CameraBaseT::connect(cameraId, clientPackageName, clientUid);
}

网上别人贴出的片段（与我朋友在公司看到的一样）为：

===>>>frameworks/av/camera/Camera.cpp

sp<Camera>Camera::connect(int cameraId)

{

ALOGV("connect");

sp<Camera> c = new Camera();

const sp<ICameraService>& cs =getCameraService();

if (cs != 0) {

c->mCamera = cs->connect(c,cameraId);

}

if (c->mCamera != 0) {

c->mCamera->asBinder()->linkToDeath(c);

c->mStatus = NO_ERROR;

} else {

c.clear();

}

return c;

}

希望各位XDJM可以看看自己的源码，帮忙确认下我的代码有问题没。
本来比较菜，要是源码都跟别人很不一样，就不知道该怎么继续了。。

谢谢各位了！！！
android源码 --------------------编程问答-------------------- 通过查看platform\build\core\version_defaults.mk ，

ifeq "" "$(PLATFORM_VERSION)"
  # This is the canonical definition of the platform version,
  # which is the version that we reveal to the end user.
  # Update this value when the platform version changes (rather
  # than overriding it somewhere else).  Can be an arbitrary string.
  PLATFORM_VERSION := 4.3.2.1.000.000
endif

ifeq "" "$(PLATFORM_SDK_VERSION)"
  # This is the canonical definition of the SDK version, which defines
  # the set of APIs and functionality available in the platform.  It
  # is a single integer that increases monotonically as updates to
  # the SDK are released.  It should only be incremented when the APIs for
  # the new release are frozen (so that developers don't write apps against
  # intermediate builds).  During development, this number remains at the
  # SDK version the branch is based on and PLATFORM_VERSION_CODENAME holds
  # the code-name of the new development work.
  PLATFORM_SDK_VERSION := 18
endif

得知，我的PLATFORM_VERSION := 4.3.2.1.000.000
          PLATFORM_SDK_VERSION := 18

补充：移动开发 ,  Android