Transitioning Between Activities with Intents


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As previously mentioned, Android applications can have multiple entry points.There is no main() function, such as you find in iPhone development. Instead, a specific Activity can be designated as the main Activity to launch by default within the AndroidManifest.xml file; we talk more about this file in Chapter 5,"Defining Your Application Using the Android Manifest File."

Other Activities might be designated to launch under specific circumstances. For example, a music application might designate a generic Activity to launch by default from the Application menu, but also define specific alternative entry point Activities for accessing specific music playlists by playlist ID or artists by name.

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