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4.0.3 and up
Android OS
了解Android的教程
Applications - Contains the applications, like the Browser, Camera, Gallery, Music and Phone
Application framework - An API which allows high-level interactions with the Android system
Libraries and runtime - The libraries for many common framework functions, like graphic rendering, data storage, web browsing. Also contains the Android runtime, as well as the core Java libraries for running Android applications.
Linux kernel - Communication layer for the underlying hardware.