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Learning Mobile App Development: A Hands-on Guide to Building Apps with iOS and Android by Michael Eierman, Jakob Iversen

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Activities, Layouts, and Intents

The primary structural components for an Android app are Activities and Layouts. These objects work together to present a display that the user can interact with. Intents are objects that are used to switch between activities in an app. All three objects are used as the basis for the structure of your app. Understanding the role and responsibilities of these objects is very important to effective development of an Android app.

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