android sdk sdkmanger无界面使用方法（命令行更新SDK）
刚刚部署安装sdk最新版本发现已经没有GUI界面了，只能使用命令去下载更新，版本号26.0.2（MAC）
主要使用的更新命令：
sdkmanager --update
sdkmanager "platform-tools" "platforms;android-26"
全部的下载内容可以使用sdkmanager -list查看
还可以通过“sdkmanager --package_file=下载清单文件路径”进行批量下载
下载清单只需要放置-list中的名称，每个换行
详细使用方式可以参考官方文档，链接如下，不能的同学可以参考下面的黏贴：
https://developer.android.com/studio/command-line/sdkmanager.html
The sdkmanager is a command line tool that allows you to view, install, update, and uninstall packages for the Android SDK. If you're using Android Studio, then you do not need to use this tool and you can instead manage your SDK packages from the IDE.
The sdkmanager tool is provided in the Android SDK Tools package (25.2.3 and higher) and is located inandroid_sdk/tools/bin/.
Usage
You can use the sdkmanager to perform the following tasks.
List installed and available packages
sdkmanager --list [options]
Install packages
sdkmanager packages [options]
The packages argument is an SDK-style path as shown with the --list command, wrapped in quotes (for example, "build-tools;26.0.2" or"platforms;android-26"). You can pass multiple package paths, separated with a space, but they must each be wrapped in their own set of quotes.
For example, here's how to install the latest platform tools (which includes adb and fastboot) and the SDK tools for API level 26:
sdkmanager "platform-tools" "platforms;android-26"
Alternatively, you can pass a text file that specifies all packages:
sdkmanager --package_file=package_file [options]
The package_file argument is the location of a text file in which each line is an SDK-style path of a package to install (without quotes).
To uninstall, simply add the --uninstall flag:
sdkmanager --uninstall packages [options] sdkmanager --uninstall --package_file=package_file [options]
Update all installed packages
sdkmanager --update [options]
Options
The following table lists the available options for the above commands.
| Option | Description |
|---|---|
--sdk_root=path |
Use the specified SDK path instead of the SDK containing this tool |
--channel=channel_id |
Include packages in channels up to channel_id. Available channels are:
|
--include_obsolete |
Include obsolete packages in the package listing or package updates. For use with --list and --updateonly. |
--no_https |
Force all connections to use HTTP rather than HTTPS. |
--verbose |
Verbose output mode. Errors, warnings and informational messages are printed. |
--proxy={http | socks} |
Connect via a proxy of the given type: either http for high level protocols such as HTTP or FTP, or socks for a SOCKS (V4 or V5) proxy. |
--proxy_host={IP_address |DNS_address} |
IP or DNS address of the proxy to use. |
--proxy_port=port_number |
Proxy port number to connect to. |
REPO_OS_OVERRIDE environment variable to either "windows", "macosx", or "linux".