Navigating on Android is vastly different -- it's designed so every activity (screen) is uniquely identifiable and can be referenced by other apps, browser URLs

Navigating on Android is vastly different -- it's designed so every activity (screen) is uniquely identifiable and can be referenced by other apps, browser URLs, etc. Activities can register which intents they support in AndroidManifest.xml, so it's not dynamic, but not heavy-weight either. Sharing from a third-party or launching from inside your own app, it's largely the same thing to an activity. As you navigate, it's like a web browser, your back button keeps a history of where you've been across apps that will work different than controls within the app to navigate back (Up). You can also pass content between activities, just as you would for sharing or viewing actions. Primarily, navigation to different activities is via Intents: http://developer.android.com/guide/components/intents-filters.html http://developer.android.com/guide/components/intents-filter... You can explicitly tell it which activity to load (as if using URLs) or you can identify the action (view or share) and mime/type of your text or binary data. http://developer.android.com/training/sharing/send.html http://developer.android.com/training/sharing/send.html Common intents: http://developer.android.com/guide/components/intents-common.html http://developer.android.com/guide/components/intents-common... So "sharing" or interacting between apps, or within your own app, or your app and system apps, is... basically baked in to Android, and far more common than you'd expect. It's like a more powerful version of "Open With" that isn't restricted to files saved to disk. I'm not sure you can send more than one type of data at a time, though it wouldn't surprise me if there's an Intent/Action for that as well. The counter to this is incredibly long lists of apps to pick from, prompts for which app to view something in (like a URL or media type) and other annoyances that you get with increased flexibility. It's pretty cool though. You can even have certain URLs open certain apps as you browse in Chrome, so if your Google search takes you to a blog that links you to Netflix, you could hop directly from the Google app, to the Chrome app, to the Netflix app and it could feel seamless, one screen to the next.