$ cd $ANROID_HOME
$ tools/android update sdk -u -s
参数
-s --no-https : Uses HTTP instead of HTTPS (the default) for downloads.
-u --no-ui : Displays list result on console (no GUI) [Default: true]
-t --filter : A filter that limits the update to the specified types of
packages in the form of a comma-separated list of
[platform, system-image, tool, platform-tool, doc, sample,
source]. This also accepts the identifiers returned by
'list sdk --extended'.