React native reavt native event.js 167错误//未知错误

我是第一次构建代码，在编译时遇到了这个错误。

---

此错误的任何解决方案？？？

这意味着您已经在使用端口8081，但您可以运行以下命令：

• sudo lsof-i:8081
• 杀死-9

    BUILD SUCCESSFUL in 14s
28 actionable tasks: 1 executed, 27 up-to-date
Running adb -s 988ad833354d59594330 reverse tcp:8081 tcp:8081
Starting the app on 988ad833354d59594330 (adb -s 988ad833354d59594330 shell am start -n com.celebrations/com.celebrations.MainActivity)...
Starting: Intent { cmp=com.celebrations/.MainActivity }
events.js:167
      throw er; // Unhandled 'error' event
      ^

Error: spawn cmd.exe ENOENT
    at Process.ChildProcess._handle.onexit (internal/child_process.js:232:19)
    at onErrorNT (internal/child_process.js:407:16)
    at process._tickCallback (internal/process/next_tick.js:63:19)
Emitted 'error' event at:
    at Process.ChildProcess._handle.onexit (internal/child_process.js:238:12)
    at onErrorNT (internal/child_process.js:407:16)
    at process._tickCallback (internal/process/next_tick.js:63:19)