1、环境配置：https://developer.android.com/training/basics/firstapp/creating-project?hl=zh-cn
2、Android 概述 | 菜鸟教程
3、常见问题和解决方案
1）vc-complex-type.2.4.a: Invalid content was found starting with element ‘base-extension‘
AS报错：cvc-complex-type.2.4.a: Invalid content was found starting with element ‘base-extension‘._小鹰信息技术服务部的博客-CSDN博客
2）Gradle sync failed: Unable to load class 'javax.xml.bind.annotation.XmlSchema
更新AS导致更新gradle导致的问题：Gradle sync failed: Unable to load class 'javax.xml.bind.annotation.XmlSchema_Lengfeld的博客-CSDN博客
