用迅雷下载如下的SDK包和API文档，然后存放到Android SDK目录的temp文件夹 ，然后运行SDK Manager点击更新该组件，OK...

https://dl-ssl.google.com/android/repository/sysimg_armv7a-19_r02.zip

https://dl-ssl.google.com/android/repository/docs-19_r02.zip

https://dl-ssl.google.com/android/repository/sysimg_x86-19_r01.zip

http://dl-ssl.google.com/android/repository/google_apis-19_r05.zip