Android app - Facebook integration

Facebook integration Currently there is no Facebook integration. The app simply pulls album images off Facebook. The app needs to have the ability for users to log into Facebook, so they can tag, comment on and like photos as well. What do I need to do to get this started? Do I need to register app with Facebook? Where does this login go? Can the buttons (described below ask for login)? Can the app remember login? Can we just ask for login once? If need be, we can add a new view under the settings button to change login details (or log out) Image tagging In the gallery section, when a user touches an image to view that image the image is displayed full screen with a toolbar at the bottom of the screen. That toolbar currently holds two buttons for navigating forward and back through the image gallery. Expected Changes Much like the current Facebook app Add new button to the toolbar so the user can tag themselves in the picture Nice to have Add new button to the toolbar to "Like" a photo Add new button (and relevant views) to comment on a photo