npx react-native run-android 不会启动模拟器，并且如果模拟器正在运行也不会运行

Question

我已经使用react-native 0.63创建了一个新项目\n当我在ios模拟器上运行时一切正常\n但是当尝试在android上运行它时，它不起作用并给我这个错误

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FAILURE: Build failed with an exception.\n\n* What went wrong:\nCould not determine the dependencies of task \':app:installDebug\'.\n> SDK location not found. Define location with an ANDROID_SDK_ROOT environment variable or by setting the sdk.dir path in your project\'s local properties file at \'/Volumes/SSD2/developer/MyProject/AwesomeProject/android/local.properties\'.\n\n* Try:\nRun 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.\n\n* Get more help at https://help.gradle.org\n\nBUILD FAILED in 2s\n\nerror 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.\nError: Command failed: ./gradlew app:installDebug -PreactNativeDevServerPort=8081\n

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我安装反应本机像\n React-Native 设置

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这是我的本地反应医生的输出

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\xe2\x9c\x93 Node.js\n \xe2\x9c\x93 npm\n \xe2\x9c\x93 Watchman - Used for watching changes in the filesystem when in development mode\n\nAndroid\n \xe2\x9c\x93 JDK\n \xe2\x9c\x93 Android Studio - Required for building and installing your app on Android\n \xe2\x9c\x96 Android SDK - Required for building and installing your app on Android\n   - Versions found: N/A\n   - Version supported: 29.0.2\n \xe2\x9c\x96 ANDROID_HOME\n\niOS\n \xe2\x9c\x93 Xcode - Required for building and installing your app on iOS\n \xe2\x9c\x93 CocoaPods - Required for installing iOS dependencies\n \xe2\x9c\x93 ios-deploy - Required for installing your app on a physical device with the CLI\n\nErrors:   2\nWarnings: 0\n

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如果我运行 npx react-native start 那么应用程序可以从 android studio 顺利运行。

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编辑\n如果我从终端源 .bash_profile 运行项目

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模拟器启动但项目未运行

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"--no-jetifier" flag.\nJetifier found 5194 file(s) to forward-jetify. Using 12 workers...\ninfo JS server already running.\ninfo Installing the app...\nenv: sh\\r: No such file or directory\n\nerror 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.\nError: Command failed: ./gradlew app:installDebug -PreactNativeDevServerPort=8081\nenv: sh\\r: No such file or directory\n

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Answer 1

看起来您需要设置 ANDROID_HOME 环境变量。

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将以下行添加到 $HOME/.bash_profile 或 $HOME/.bashrc （如果您使用 zsh，则使用 ~/.zprofile 或 ~/.zshrc）配置文件：

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export ANDROID_HOME=$HOME/Library/Android/sdk\nexport PATH=$PATH:$ANDROID_HOME/emulator\nexport PATH=$PATH:$ANDROID_HOME/tools\nexport PATH=$PATH:$ANDROID_HOME/tools/bin\nexport PATH=$PATH:$ANDROID_HOME/platform-tools\n

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键入 source $HOME/.bash_profile for bash 或 source $HOME/.zprofile 将配置加载到当前 shell 中。通过运行 echo $ANDROID_HOME 验证 ANDROID_HOME 是否已设置，并且通过运行 echo $PATH 已将适当的目录添加到您的路径中。

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请确保您使用正确的 Android SDK 路径。您可以在 Android Studio“首选项”对话框中的外观和行为 \xe2\x86\x92 系统设置 \xe2\x86\x92 Android SDK 下找到 SDK 的实际位置。

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参考：

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• https://reactnative.dev/docs/environment-setup 3.配置ANDROID_HOME环境变量
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