问题
Is it possible to get the public +1 counts for a specific url from google+ as json or xml? (Something similar to the functionality of the +1 button)
回答1:
no, there is no API for getting +1s for a URL. For now, you can only get plusoners for an activity via activity.get or people.listByActivity. We've had reports lately of people.listByActivity not returning the full list, so until we get that fixed I'd stick with pulling the count from activity.get.
回答2:
Currently there is no public API method for this. You can show Google that you want such a method by staring the feature request.
来源：https://stackoverflow.com/questions/8198478/google-1-count-as-json-for-a-url