Does anyone have a working example of sharing an image to Google+ from Android?

Question

Google

I read this: https://developers.google.com/+/mobile/android/sha...
I did it by analogy, except without choosing a picture, I just take the saved one: Uri.fromFile(new File(localFilePath))
But, then the pictures after posting suddenly shrink to 180x320, then in the posting activity itself in G + the preview of the picture is displayed on the left (from somewhere in the cache, or what?)