我是React-Native开发的新手。我尝试了一个来自Facebook git hub的简单react原生项目。我已经遵循了所有的步骤，但当我试图运行该项目键入
react-native run-android它只是显示以下错误：
info Running jetifier to migrate libraries to AndroidX. You can disable it using "--no-jetifier" flag.
Jetifier found 864 file(s) to forward-jetify. Using 4 workers...
info Starting JS server...
info Launching emulator...
info Successfully launched emulator.
info Installing the app...
Warning: No leading - on line 1 of `C:\Program Files\Java\jdk-13\lib\jvm.cfg'
error Failed to install the app. Make sure you have the Android development environment set up: https://facebook.github.io/react-native/docs/getting-started.html#android-development-environment. Run CLI with --verbose flag for more details.
Error: Command failed: gradlew.bat app:installDebug -PreactNativeDevServerPort=8081
Warning: No leading - on line 1 of `C:\Program Files\Java\jdk-13\lib\jvm.cfg'
at checkExecSyncError (child_process.js:611:11)
at execFileSync (child_process.js:629:15)
at runOnAllDevices (C:\Users\Toshiba\Documents\AwesomeProject\node_modules\@react-native-community\cli-platform-android\build\commands\runAndroid\runOnAllDevices.js:94:39)
at processTicksAndRejections (internal/process/task_queues.js:97:5)
at async Command.handleAction (C:\Users\Toshiba\Documents\AwesomeProject\node_modules\react-native\node_modules\@react-native-community\cli\build\index.js:164:9)
4条答案
按热度按时间k7fdbhmy1#
原来我的Java有问题。我卸载了JDK和JRE，重新安装了最新版本，它对我很有效。
wlzqhblo2#
尝试这些一次：
希望它能帮助
qcbq4gxm3#
如果您使用的是最新版本的Java Development Kit，则需要更改项目的Gradle版本，以便它能够识别JDK。您可以通过转到**{项目根文件夹}\android\gradle\wrapper\gradle-wrapper. properties并更改distributionUrl**值来升级Gradle版本。你可以在这里查看Gradle的lastest releases
jyztefdp4#
您遇到的错误消息表明，在运行“./gradlew clean”命令时，在React Native中配置项目“：rn-fetch-blob”时出现问题。具体来说，它提到无法从该高速缓存加载位于“D：\D-drive\移动的\mkc-student-app\node_modules\rn-fetch-blob\android\build.gradle”的构建文件的编译类。
要解决此问题，您可以尝试以下步骤：
**2.**导航至以下目录删除Gradle缓存：
**3.**删除该高速缓存后，再次运行“./gradlew clean”命令。