在Windows7 64bit上也有同样的问题。它没有的原因是sdk/tools下缺少模拟器-x86.exe文件。通过使用Android SDK管理器删除Android SDK工具并重新安装来修复。该文件现在存在，模拟器按预期工作。

Windows 10, 5.29.18:

使用命令提示符，我刚刚进入模拟器目录:

cd C:\Android\sdk\emulator

然后输入命令:

emulator -avd Nexus_S_API_27

Nexus_S_API_27是自定义模拟器的名称。

否则会滥用:

PANIC: Missing emulator engine program for 'x86' CPU.

在macOS Mojave 10.14.5上测试。

原因及解决方法:

我们使用sdk/tools/emulator，我们应该使用sdk/emulator。

WM-C02WM0T3HTD8:~ zgong$ emulator -avd Pixel_3_XL_API_Q_x86
PANIC: Unknown AVD name [Pixel_3_XL_API_Q_x86], use -list-avds to see valid list.
HOME is defined but there is no file Pixel_3_XL_API_Q_x86.ini in $HOME/.android/avd
(Note: Directories are searched in the order $ANDROID_AVD_HOME, $ANDROID_SDK_HOME/avd, and $HOME/.android/avd)
WM-C02WM0T3HTD8:~ zgong$ emulator -avd Pixel_3_XL_API_Q
PANIC: Missing emulator engine program for 'x86' CPU.

我们可以检查模拟器的位置:

WM-C02WM0T3HTD8:~ zgong$ which emulator
/Users/zgong/Library/Android/sdk/tools/emulator

我在谷歌上搜索了一下，大部分答案都是关于 在终端中正确设置路径，结果是 与SDK最新版本的转变有关，其中模拟器 App位于/emulator而不是/tools。把这个留在这里 Case也遇到了同样的问题。

我们需要使用如下:

{sdk location}/ avd -模拟器{avd}

以下是实际输出:

WM-C02WM0T3HTD8:~ zgong$ /Users/zgong/Library/Android/sdk/emulator/emulator -avd Pixel_3_XL_API_Q
pc_memory_init: above 4g size: 40000000
emulator: WARNING: UpdateCheck: Failure: Error
emulator: WARNING: UpdateCheck: failed to get the latest version, skipping check (current version '29.2.1-5889189')
emulator: WARNING: UpdateCheck: Failure: Error
WebSocketServer listening on port 55850
Qt WebEngine ICU data not found at /Users/joshuaduong/qt-build-5.12.1/install-darwin-x86_64/resources. Trying parent directory...
Qt WebEngine ICU data not found at /Users/joshuaduong/qt-build-5.12.1/install-darwin-x86_64/resources. Trying parent directory...
Qt WebEngine ICU data not found at /Users/joshuaduong/qt-build-5.12.1/install-darwin-x86_64. Trying application directory...
Qt WebEngine ICU data not found at /Users/joshuaduong/qt-build-5.12.1/install-darwin-x86_64. Trying application directory...
Installed Qt WebEngine locales directory not found at location /Users/joshuaduong/qt-build-5.12.1/install-darwin-x86_64/translations/qtwebengine_locales. Trying application directory...
Qt WebEngine locales directory not found at location /Users/zgong/Library/Android/sdk/emulator/lib64/qt/libexec/qtwebengine_locales. Trying fallback directory... Translations MAY NOT not be correct.
Installed Qt WebEngine locales directory not found at location /Users/joshuaduong/qt-build-5.12.1/install-darwin-x86_64/translations/qtwebengine_locales. Trying application directory...
Qt WebEngine locales directory not found at location /Users/zgong/Library/Android/sdk/emulator/lib64/qt/libexec/qtwebengine_locales. Trying fallback directory... Translations MAY NOT not be correct.
Path override failed for key ui::DIR_LOCALES and path '/Users/zgong/.QtWebEngineProcess'
Path override failed for key ui::DIR_LOCALES and path '/Users/zgong/.QtWebEngineProcess'
Qt WebEngine resources not found at /Users/joshuaduong/qt-build-5.12.1/install-darwin-x86_64/resources. Trying parent directory...
Qt WebEngine resources not found at /Users/joshuaduong/qt-build-5.12.1/install-darwin-x86_64. Trying application directory...
Qt WebEngine resources not found at /Users/joshuaduong/qt-build-5.12.1/install-darwin-x86_64/resources. Trying parent directory...
Qt WebEngine resources not found at /Users/joshuaduong/qt-build-5.12.1/install-darwin-x86_64. Trying application directory...
[0403/154905.171893:WARNING:resource_bundle_qt.cpp(116)] locale_file_path.empty() for locale
[0403/154905.171871:WARNING:resource_bundle_qt.cpp(116)] locale_file_path.empty() for locale
Qt WebEngine ICU data not found at /Users/joshuaduong/qt-build-5.12.1/install-darwin-x86_64/resources. Trying parent directory...
Qt WebEngine ICU data not found at /Users/joshuaduong/qt-build-5.12.1/install-darwin-x86_64. Trying application directory...
Installed Qt WebEngine locales directory not found at location /Users/joshuaduong/qt-build-5.12.1/install-darwin-x86_64/translations/qtwebengine_locales. Trying application directory...
Qt WebEngine locales directory not found at location /Users/zgong/Library/Android/sdk/emulator/lib64/qt/libexec/qtwebengine_locales. Trying fallback directory... Translations MAY NOT not be correct.
Path override failed for key ui::DIR_LOCALES and path '/Users/zgong/.QtWebEngineProcess'
Qt WebEngine resources not found at /Users/joshuaduong/qt-build-5.12.1/install-darwin-x86_64/resources. Trying parent directory...
Qt WebEngine resources not found at /Users/joshuaduong/qt-build-5.12.1/install-darwin-x86_64. Trying application directory...
[0403/154907.393116:WARNING:resource_bundle_qt.cpp(116)] locale_file_path.empty() for locale

参考: https://www.reddit.com/r/androiddev/comments/a978kx/mac_can_run_emulator_fine_through_android_studio/

这在macOS上很管用:

echo 'export PATH=$PATH:'$HOME'/Library/Android/sdk/emulator:'$HOME'/Library/Android/sdk/tools:'$HOME'/Library/Android/sdk/platform-tools' >> ~/.bash_profile
source ~/.bash_profile

点击下面的命令。这对我很管用。Android已经将模拟器目录从/tools更改为sdk/emulator

/Users/yourusername/Library/Android/sdk/emulator/emulator -avd Pixel_API_27

尝试以下方法启动模拟器-x86:

export LD_LIBRARY_PATH=$SDK/tools/lib:$LD_LIBRARY_PATH
$SDK/tools/emulator-x86 <your-other-options>

其中$SDK是SDK安装的路径。这就是“模拟器”试图做的事情。你可能想启动emulator64-x86而不是simulator -x86(如果前者存在的话)。