The Android SDK archive now only contains the tools. It no longer comes populated with a specific Android platform or Google add-on. Instead you use the SDK Manager to install or update SDK components such as platforms, tools, add-ons, and documentation.
google现在提供的是类似chrome下载方式的那种东东了
populated with a specific Android platform or Google add-on. Instead you
use the SDK Manager to install or update SDK components such as platforms,
tools, add-ons, and documentation.