android 源码

源码下载：

git clone http://android.googlesource.com/platform/frameworks/base

在线源码：

http://androidxref.com/

http://grepcode.com/search/?query=google+android&entity=project

http://grepcode.com/project/repository.grepcode.com/java/ext/com.google.android/android/

http://tool.oschina.net/apidocs/apidoc?api=android/reference