Android是基于Linux内核的操作系统，是Google公司在2007年11月5日公布的手机操作系统，早期由Google开发，后由开放手持设备联盟（Open Handset Alliance）开发。它采用了软件堆层（software stack，又名以软件叠层）的架构，主要分为三部分。底层Linux内核只提供基本功能；其他的应用软件则由各公司自行开发，部分程序以Java编写。-Android is an operating system based on Linux kernel is Google Inc. in November 5, 2007 announced mobile operating system developed by Google earlier, after the opening handhelds Alliance (Open Handset Alliance) development. It uses a software stacks (software stack, also known as a software stack) architecture is divided into three parts. Underlying Linux kernel only provides the basic functions　other application software developed by the companies themselves, part of the program written in Java.