| PlusOneButton.OnPlusOneClickListener | A listener for +1 button clicks. |
| GooglePlusUtil | Utility class for verifying that the Google+ app is available and up-to-date on this device. |
| PlusClient | The main entry point for Google+ integration. |
| PlusOneButton | The +1 button to recommend a URL on Google+. |
| PlusShare | Utility class for including resources in posts shared on Google+ through
an ACTION_SEND intent. |
| PlusShare.Builder | |
| PlusSignInButton | The Google+ sign-in button to authenticate the user. |