how to run android emulator use command line
从命令行启动 Android 模拟器
$ emulator @avd_name
$ emulator -avd avd_name
https://developer.android.com/studio/run/emulator-commandline
AVD Manager
demo
$ emulator @A5.1
$ emulator -avd A5.1
$ ./emulator @A5.1
$ ~/Library/Android/sdk/tools/emulator @A5.1
zsh: command not found: emulator
https://gist.github.com/xgqfrms/fec166c9e3fab5832310cbf102a076fd