(Android is an open source mobile operating system based on Linux platform announced by Google on November 5, 2007. It includes an operating system, middleware and some important applications. It adopts the architecture of software stack (also called software stack), which is mainly divided into three parts. The bottom layer is based on the Linux kernel office, developed by C language, and only provides basic functions; The middle tier includes the function library Library and the Dalvik virtual machine, which are developed by C . The top layer is a variety of use software, including call programs, SMS programs, etc. The use software is developed by enterprises themselves, with Java as a part of the programming. There is no exclusive right to prevent the innovation of mobile industry in the past. It is said to be the first truly open and complete mobile software for mobile terminals! This document includes the following annexes:)
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