Opersys is happy to provide you with online tools to help you with your Android development.
Opersys AOSP Cross Reference allows you to easily browse various versions of Google's AOSP source tree. You can also search per reference and per project.
Opersys AOSP Changelog allows you to see what has changed between various versions of Google's AOSP source tree. We support all releases and provide you with the list of every simgle change that happened.