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

Question

我正在尝试运行命令react-native run-android，但它抛出错误。我正在关注我遵循的每一步的文档，但它不起作用，我认为它没有选择路径，但它设置为 doc 中所示。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.这是我在 android 中运行 react native 后得到的错误

Answer 1

做这些。

1. 确保 JDK 版本为 8 或更新版本。

2. 确保正确设置了 android 路径。

3. 删除 android/build 和 android/app/build 文件夹。

编辑：如果 JDK 版本是 14并且 gradle 版本低于 6.3您必须将 JDK 降级到 11 或将 gradle 升级到 6.3 以上

Answer 2

你有 RN 启动模拟器时遇到问题。所以你可能需要自己启动它，或者连接真实设备