UPDATE
最新版本介绍sdkmanager，一个命令行工具，允许您查看、安装、更新和卸载 Android SDK 的包。
The sdkmanagerAndroid SDK 工具包中提供了该工具（25.2.3 及更高版本）并且位于android_sdk/tools/bin/.
sdkmanager [--uninstall] [<common args>] [--package_file <file>] [<packages>...]
sdkmanager --update [<common args>]
sdkmanager --list [<common args>]
sdkmanager --licenses [<common args>]
In its first form, installs, or uninstalls, or updates packages.
By default, the listed packages are installed or (if already installed)
updated to the latest version.
--uninstall: uninstalled listed packages.
<package> is a sdk-style path (e.g. "build-tools;23.0.0" or
"platforms;android-23").
<package-file> is a text file where each line is a sdk-style path
of a package to install or uninstall.
Multiple --package_file arguments may be specified in combination
with explicit paths.
In its second form (with --update), all installed packages are
updated to the latest version.
In its third form, all installed and available packages are printed
out.
In its fourth form (with --licenses), show and offer the option to
accept licenses for all available packages that have not already been
accepted.
Common Arguments:
--sdk_root=<sdkRootPath>: Use the specified SDK root instead of the SDK
containing this tool
--channel=<channelId>: Include packages in channels up to <channelId>.
Common channels are:
0 (Stable), 1 (Beta), 2 (Dev), and 3 (Canary).
--include_obsolete: With --list, show obsolete packages in the
package listing. With --update, update obsolete
packages as well as non-obsolete.
--no_https: Force all connections to use http rather than https.
--proxy=<http | socks>: Connect via a proxy of the given type.
--proxy_host=<IP or DNS address>: IP or DNS address of the proxy to use.
--proxy_port=<port #>: Proxy port to connect to.
* If the env var REPO_OS_OVERRIDE is set to "windows",
"macosx", or "linux", packages will be downloaded for that OS.
因此，要更新软件包，请运行
sdkmanager --update
要接受许可证，
yes | sdkmanager --licenses
旧答案
（请注意：android命令已弃用！）
距离自动化越近的可能是：
android update sdk --no-ui
android提供以下自动更新选项：
Action "update sdk":
Updates the SDK by suggesting new platforms to install if available.
Options:
-f --force Forces replacement of a package or its parts, even if something has been modified
-u --no-ui Updates from command-line (does not display the GUI)
-o --obsolete Installs obsolete packages
-t --filter A filter that limits the update to the specified types of packages in the form of
a comma-separated list of [platform, tool, platform-tool, doc, sample, extra]
-s --no-https Uses HTTP instead of HTTPS (the default) for downloads
-n --dry-mode Simulates the update but does not download or install anything
如果您想列出哪些软件包可供安装，您可以使用
android list sdk
您将获得一个有序的软件包列表，例如
Packages available for installation or update: 9
1- ARM EABI v7a System Image, Android API 15, revision 2
2- Intel x86 Atom System Image, Android API 15, revision 1
3- Android Support, revision 8
4- Google AdMob Ads SDK, revision 6
5- Google Analytics SDK, revision 2
6- Google Play APK Expansion Library, revision 1
7- Google Play Billing Library, revision 2
8- Google Play Licensing Library, revision 2
9- Google Web Driver, revision 2
此外，如果您使用--filter option
android update sdk --filter <component> --no-ui
其中组件是以下一项或多项
- 返回的数字
android list sdk (i.e. 1， 也叫作封装索引)
- add-on
- doc
- extra
- platform
- 平台工具
- sample
- source
- 系统映像
- tool
或者可以是一个或多个特定标识符。例如，如果您只想下载一小组特定的软件包，您可以这样做：
android update sdk -u --filter platform-tools,android-16,extra-android-support
您只需获得平台工具、API 级别 16 和支持包 JAR 文件。如果您仅构建构建机器并且必须付费下载所有您永远不会使用的额外内容，那么这非常方便。
要查看可用选项，您可以使用 --help，例如
android --help list sdk
Usage:
android [global options] list sdk [action options]
Global options:
-h --help : Help on a specific command.
-v --verbose : Verbose mode, shows errors, warnings and all messages.
--clear-cache: Clear the SDK Manager repository manifest cache.
-s --silent : Silent mode, shows errors only.
Action "list sdk":
Lists remote SDK repository.
Options:
-o --obsolete : Deprecated. Please use --all instead.
-a --all : Lists all available packages (including obsolete and
installed ones)
--proxy-host: HTTP/HTTPS proxy host (overrides settings if defined)
--proxy-port: HTTP/HTTPS proxy port (overrides settings if defined)
-s --no-https : Uses HTTP instead of HTTPS (the default) for downloads.
-e --extended : Displays extended details on each package
-u --no-ui : Displays list result on console (no GUI) [Default: true]
