Define location with an ANDROID_SDK_ROOT environment variable or by setting the sdk.dir

updated Sep 27, 2021created Sep 27, 2021

エラー

bash
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 app:installDebug -PreactNativeDevServerPort=8081 FAILURE: Build failed with an exception. * What went wrong: Could not determine the dependencies of task ':app:installDebug'. > 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 '/Users/user/your-app/android/local.properties'.

というWarningが発生し、React NativeのビルドがFAILEDになっていた。

解決策

.zshrcなどにANDROID_SDK_ROOTを定義するかlocal.propertiesファイルを作成し、sdk.dirを定義する。今回は、local.propertiesを作成する方で対応した。

bash
touch /Users/user/your-app/android/local.properties
local.properties
## This file must *NOT* be checked into Version Control Systems, # as it contains information specific to your local configuration. # # Location of the SDK. This is only used by Gradle. # For customization when using a Version Control System, please read the # header note. #Thu Dec 10 16:26:54 JST 2020 sdk.dir=/Users/user/Library/Android/sdk

参考

android - Where is android_sdk_root? and how do I set it.? - Stack Overflow