Activity in Android

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An Activity can be understood as a screen that performs a very particular action in an Android application (for example, we use an Activity to log in or to modify our profile). The activities interact with the user, they present a window and present an interactive UI inside (this is done through the function setContentView() ). Activities are typically full-screen or also as a floating screen. They have their own cycle, and are pilled within a stack of Activities handle by the operative system.

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