Javascript React-Native，为什么React-Native运行的android不工作？

我试图运行command

react native run android

，但它抛出了一个错误。我在遵循文档，我遵循了每一步，但它不起作用，我认为它没有选择路径，但它设置为如文档所示。谁能告诉我怎么了

info Running jetifier to migrate libraries to AndroidX. You can disable it using "--no-jetifier" flag.
(node:12536) Warning: Accessing non-existent property 'padLevels' of module exports inside circular dependency
(Use `node --trace-warnings ...` to show where the warning was created)
Jetifier found 967 file(s) to forward-jetify. Using 4 workers...
info Starting JS server...
'C:\Users\Danger' is not recognized as an internal or external command,
operable program or batch file.
info Launching emulator...
'C:\Users\Danger' is not recognized as an internal or external command,
operable program or batch file.
'C:\Users\Danger' is not recognized as an internal or external command,
operable program or batch file.
'C:\Users\Danger' is not recognized as an internal or external command,
operable program or batch file.
'C:\Users\Danger' is not recognized as an internal or external command,
operable program or batch file.
'C:\Users\Danger' is not recognized as an internal or external command,
operable program or batch file.
'C:\Users\Danger' is not recognized as an internal or external command,
operable program or batch file.
'C:\Users\Danger' is not recognized as an internal or external command,
operable program or batch file.
'C:\Users\Danger' is not recognized as an internal or external command,
operable program or batch file.
'C:\Users\Danger' is not recognized as an internal or external command,
operable program or batch file.
'C:\Users\Danger' is not recognized as an internal or external command,
operable program or batch file.
'C:\Users\Danger' is not recognized as an internal or external command,
operable program or batch file.
'C:\Users\Danger' is not recognized as an internal or external command,
operable program or batch file.
'C:\Users\Danger' is not recognized as an internal or external command,
operable program or batch file.
'C:\Users\Danger' is not recognized as an internal or external command,
operable program or batch file.
'C:\Users\Danger' is not recognized as an internal or external command,
operable program or batch file.
'C:\Users\Danger' is not recognized as an internal or external command,
operable program or batch file.
'C:\Users\Danger' is not recognized as an internal or external command,
operable program or batch file.
error Failed to launch emulator. Reason: Could not start emulator within 30 seconds..
warn Please launch an emulator manually or connect a device. Otherwise app may fail to launch.
info Installing the app...

FAILURE: Build failed with an exception.

* What went wrong:
Could not initialize class org.codehaus.groovy.runtime.InvokerHelper

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights. 

* Get more help at https://help.gradle.org

BUILD FAILED in 17s

error Failed to install the app. Make sure you have the Android development environment set up: https://reactnative.dev/docs/environment-setup. Run CLI with --verbose flag for more details.
Error: Command failed: gradlew.bat app:installDebug -PreactNativeDevServerPort=8081

这就是我在android中运行react native后遇到的错误，请执行这些操作

确保JDK版本为8或更高版本

确保android路径设置正确

删除android/build和android/app/build文件夹

编辑：

---

如果JDK版本为14，而gradle版本低于6.3，则必须将JDK降级至11或将gradle升级至6.3以上。您的问题似乎与以下方面有关：

---

它还说您在启动模拟器时遇到了问题。所以你可能需要自己启动它，或者连接真正的设备

试试这个链接一定会帮助你没有工作为什么它显示，

'C:\Users\Danger'没有被识别为内部或外部命令，可操作程序或批处理文件

JDK版本是14，我按照docs正确设置了路径，build.grade one？好，Jdk v14与gradle存在问题。我更新了我的答案。我很高兴它更新了：）RN lauch emulator，但之后什么也没有发生，它只是抛出错误以及为什么该错误

'C:\Users\Danger'未被识别为内部或外部命令、可操作的程序或批处理文件。

？您使用的是什么节点版本？我使用的是节点v14.14.0是否正确设置了所有路径：