一。android 环境搭建,hello world

1.sdk(java development kit) 1.7+, 安装及环境变量配置   javac 

https://www.oracle.com/java/technologies/downloads/#jdk18-windows

2 androud studio (include android sdk)

https://developer.android.google.cn/studio#downloads

3.AMD cpu 安装的模拟器

https://www.genymotion.com/download/ AMD cpu 安装的模拟器