Inside Gmail, there is a small function called "Task". It can allow me to enter a to-do-list. I'm wondering if there is any official / unofficial Google API to access / update the list by Java language?
The official Google Task API has been released in May 2011 (Well, it's in Labs, but it is official)
https://developers.google.com/google-apps/tasks/
Here are the Java specific libraries:
The official Google Tasks API doesn't exist as of now. There is a feature request open at http://code.google.com/p/gdata-issues/issues/detail?id=987.
If you sort the Google API issues by number of stars, this feature is overwhelmingly at the top of the list. There must be some political reason why they're not providing an API - this has been on the tracker for nearly 2 years now (added Jan 18, 2009).
Type Priority Stars Summary
Enhancement Medium 4810 Request API for Tasks (in the Google Mail Interface)
Enhancement Low 158 structured fields wanted for postal addresses
Enhancement Medium 133 embed several private calendars in one iframe
Defect High 100 Lack of Individual Name Fields Causes Synchronization Problems with Mobile Devices
Enhancement ---- 77 Upload arbitrary file types to standard accounts
Its a perl module. Check it if it can help you.
Update - it seems as if it is on their task list for 2011, see this post from 13 January 2011:
http://gmailblog.blogspot.com/2011/01/top-tasks-for-google-tasks.html
Finally, they released the API : http://code.google.com/intl/uk/apis/tasks/index.html
Apparently it's getting close. http://code.google.com/p/gdata-issues/issues/detail?id=987
来源：https://stackoverflow.com/questions/1485822/gmail-task-api-exist