在我的例子中，我关心的是C:驱动器磁盘空间。 所以我所做的就是复制。Avd "文件夹(不是文件)到其他驱动器，并留下".ini"文件，但改变它指向移动

用于Windows 10上的Visual Studio 2017

复制C:\Users\ YOURUSERNAME \。android文件夹到(例如)E:\avd

打开环境变量窗口:

进入设置，点击系统。 2 .在界面左侧单击“关于”，在界面右侧选择“系统信息” 底部。 在新窗口中，单击“Advanced system” 左边的设置。 点击环境变量 结果窗口的底部。

添加一个新变量:

变量名:ANDROID_SDK_HOME 变量值:一个目录的路径(例如E:\avd)

不要在变量值中包含.android。

重新启动Visual Studio。

更改SDK和NDK位置到:

工具->选项-> Xamarin -> Android设置

根据官方文档https://developer.android.com/studio/command-line/variables.html，您应该更改ANDROID_AVD_HOME environment var:

Emulator Environment Variables By default, the emulator stores configuration files under $HOME/.android/ and AVD data under $HOME/.android/avd/. You can override the defaults by setting the following environment variables. The emulator -avd command searches the avd directory in the order of the values in $ANDROID_AVD_HOME, $ANDROID_SDK_HOME/.android/avd/, and $HOME/.android/avd/. For emulator environment variable help, type emulator -help-environment at the command line. For information about emulator command-line options, see Control the Emulator from the Command Line. ANDROID_EMULATOR_HOME: Sets the path to the user-specific emulator configuration directory. The default location is $ANDROID_SDK_HOME/.android/. ANDROID_AVD_HOME: Sets the path to the directory that contains all AVD-specific files, which mostly consist of very large disk images. The default location is $ANDROID_EMULATOR_HOME/avd/. You might want to specify a new location if the default location is low on disk space.

在修改或设置ANDROID_AVD_HOME后，你必须将所有内容移动到~user/。Android /avd/到你的新位置，并改变路径到每个模拟器的ini文件，只需用你的新路径替换它

修改“C:\Documents and Settings{your windows login}.android\avd\”中的“virtual_android2.2.ini”文件:

target=android-8
path=E:\android_workspace\avd\virtual_android2.2.avd

移动文件夹virtual_android2.2。从“C:\文档和设置{您的windows登录}。android\avd\变成E:\android_workspace\avd\。

进入Android tools目录。编辑android.bat命令文件。在命令文件的末尾，找到类似于

call %java_exe% -Djava.ext.dirs=%java_ext_dirs% -Dcom.android.sdkmanager.toolsdir="%tools_dir%" -Dcom.android.sdkmanager.workdir="%work_dir%" -jar %jar_path% %*

和替换

call %java_exe%

with

call %java_exe% -Duser.home={your_prefer_dir}

{your_prefer_dire}是您的首选目录，不带大括号，但添加双引号，

如。

call %java_exe% -Duser.home="E:\Program Files (x86)\android-sdk-windows"

In Windows 10 I had that problem because My C Drive was getting full and I had needed free Space, AVD folder had 14 gig space so I needed to move that folder to another driver, first answer not work for Me so I tested another way to fix it this problem, I make a picture for you if you have the same problem, you don't need to move all of the files in .android folder to another drive (this way not work) just move avd folders in ....android\avd to another drive and open .ini files and change avd folder path from that file to the new path. Like this image:

我希望这对你有用。

注意:小心在ini文件的路径之前和之后有一个你看不到的单独的字符，如果你删除了那个字符，它就不起作用了