ANDROID_SDK_HOME在Windows 8 x64上也适用 也找到所有的位置(在我的情况下，它是d:\.android)并删除它。你不再需要它了。

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

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

我关注了https://www.mysysadmintips.com/windows/clients/761-move-android-studio-avd-folder-to-a-new-location。

Start copying a folder "C:\Users\user\.android\avd" to "D:\Android\.android\avd" (or something else). Close Android Studio and running emulators. Press Win + Break and open Advanced System Settings. Then press Environment Variables. Add a user variable ANDROID_SDK_HOME. (I didn't experiment with ANDROID_AVD_HOME.) In Variable value field write D:\Android. If you also moved SDK to another folder, change ANDROID_HOME (I forgot to change it and some emulators didn't launch, see https://stackoverflow.com/a/57408085/2914140). Wait until the folder will finish copying and start Android Studio. Open Android Virtual Device Manager and see a list of emulators. If you don't see emulators and they existed, then probably you entered wrong path into user variable value in step 3. In this case close AS, change the variable and open AS again. Start any emulator. It will try to restore it's state, but it sometimes fails. A black screen can appear instead of Android wallpaper. In this case you can: a. Restart your emulator. To do this close running emulator, then in AVD Manager click Cold Boot Now.

b.如果这没有帮助，打开模拟器设置，在文件“D:\Android\. Android\ avd\Pixel_API_27.ini”中找到。

更改路径到一个新的AVD文件夹。重新启动模拟器。

删除旧的AVD文件夹从“C:\Users\user\.android\ AVD”

在AVD管理器中，使用谷歌api的目标设置AVD后，运行时得到错误。

详细信息显示:“AVD未知目标'谷歌Inc.:谷歌api:......”

在安装期间(在Win7系统上)，我选择了一个SDK目录位置，而不是接受c:\ users \… 然后我将该目录添加到环境变量path中 命令行:android列表目标确实显示了两个谷歌api。

设置ANDROID_SDK_HOME到我的安装路径修复了avd运行错误。

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