Talking about Android 01

<span id="Label3"></p><p><span style="font-size: 14pt;">Android<span style="font-family: 宋体;"><span style="font-family: 宋体;">is to secure the</span></span><span style="font-family: Calibri;"><span style="font-family: Calibri;">Linux</span></span><span style="font-family: 宋体;"><span style="font-family: 宋体;">based on the operating system, a rich application development library is built on Top. A total of four layers of system architecture, each layer from the bottom up to provide the corresponding services, the bottom is</span></span><span style="font-family: Calibri;"><span style="font-family: Calibri;">Linux Kernel</span></span><span style="font-family: 宋体;"><span style="font-family: 宋体;">, by</span></span><span style="font-family: Calibri;"><span style="font-family: Calibri;">Linux</span></span><span style="font-family: 宋体;">the <span style="font-family: 宋体;">underlying system provides a variety of drivers for dealing with mobile hardware, such as</span></span><span style="font-family: Calibri;"><span style="font-family: Calibri;">Camera Driver</span></span><span style="font-family: 宋体;"><span style="font-family: 宋体;">the last layer is</span></span><span style="font-family: Calibri;"><span style="font-family: Calibri;">LIBRARIES</span></span><span style="font-family: 宋体;"><span style="font-family: 宋体;">, it means</span></span><span style="font-family: Calibri;"><span style="font-family: Calibri;">Android</span></span><span style="font-family: 宋体;"><span style="font-family: 宋体;">Third-party components in the system, such as</span></span><span style="font-family: Calibri;"><span style="font-family: Calibri;">SQLite</span></span><span style="font-family: 宋体;"><span style="font-family: 宋体;">(built-in database),</span></span><span style="font-family: Calibri;"><span style="font-family: Calibri;">Android Runtime</span></span><span style="font-family: 宋体;"><span style="font-family: 宋体;">(to</span></span><span style="font-family: Calibri;"><span style="font-family: Calibri;">Java</span></span><span style="font-family: 宋体;"><span style="font-family: 宋体;">Virtual Machine re-implemented</span></span><span style="font-family: Calibri;"><span style="font-family: Calibri;">DVM</span></span><span style="font-family: 宋体;"><span style="font-family: 宋体;">Virtual machines); The second layer is</span></span><span style="font-family: Calibri;"><span style="font-family: Calibri;">Application Framework</span></span><span style="font-family: 宋体;"><span style="font-family: 宋体;">, which provides the management components of various programs, such as</span></span><span style="font-family: Calibri;"><span style="font-family: Calibri;">Window Manager</span></span><span style="font-family: 宋体;"><span style="font-family: 宋体;">the first layer is</span></span><span style="font-family: Calibri;"><span style="font-family: Calibri;">Applications</span></span><span style="font-family: 宋体;"><span style="font-family: 宋体;">layer, There</span></span><span style="font-family: Calibri;"><span style="font-family: Calibri;">Android</span></span><span style="font-family: 宋体;">Some of the embedded applications, as well as applications that are <span style="font-family: 宋体;">implemented by programmers themselves, cannot be counted at this level of the Program. This complete architecture provides developers with the Convenience. </span></span><span style="font-family: Calibri;"><span style="font-family: Calibri;">Android</span></span><span style="font-family: 宋体;"><span style="font-family: 宋体;">the same features are open and free, which makes</span></span><span style="font-family: Calibri;"><span style="font-family: Calibri;">Android</span></span><span style="font-family: 宋体;"><span style="font-family: 宋体;">has the widest audience. </span></span></span></p><p><p><span style="font-size: 14pt;">Android <span style="font-family: 宋体;">operation and System was originally developed by</span> <span style="font-family: Calibri;">Andy Rubin</span> <span style="font-family: 宋体;">, which mainly supports mobile Phones. It was later funded by</span> <span style="font-family: Calibri;">Google</span> , <span style="font-family: 宋体;">and components opened up Mobile Alliance development, and then gradually expanded to tablet computers and other Areas. </span></span></p></p><p><p>Talking about Android 01</p></p></span>