React原生，为什么react-native run-android不工作？

Question

我试图运行命令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，我认为这不是选择路径，而是它设置如文档所示。谁能告诉我出什么事了吗？

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

Answer 1

做这些。

1. 确保JDK版本为8或更高。
2. 确保android路径设置正确。
3. 删除Android/build和Android/app/build文件夹。

编辑：如果JDK版本为14，而gradle版本小于6.3，则必须将JDK降级到11，或者将gradle升级到6.3以上