How to run react native app on real android device?-CodePudding

I tried to run my app on an android device, but I got this error after usign npx react-native run-android in my vscode terminal:

PS C:\Users\user\Desktop\NewProgram\ReactN\my-app> npx react-native run-android info Running jetifier to migrate libraries to AndroidX. You can disable it using "--no-jetifier" flag. Jetifier found 863 file(s) to forward-jetify. Using 2 workers... info Starting JS server... "adb" no se reconoce como un comando interno o externo, programa o archivo por lotes ejecutable. info Launching emulator... error Failed to launch emulator. Reason: No emulators found as an output of emulator -list-avds. warn Please launch an emulator manually or connect a device. Otherwise app may fail to launch. info Installing the app... Downloading https://services.gradle.org/distributions/gradle-7.2-all.zip ..............10%...............20%...............30%...............40%...............50%...............60%...............70%...............80%...............90%...............100%

Welcome to Gradle 7.2!

Here are the highlights of this release:

Toolchain support for Scala
More cache hits when Java source files have platform-specific line endings
More resilient remote HTTP build cache behavior

For more details see https://docs.gradle.org/7.2/release-notes.html

Starting a Gradle Daemon (subsequent builds will be faster)

FAILURE: Build failed with an exception.

What went wrong: Could not determine the dependencies of task ':app:compileDebugJavaWithJavac'.

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 'C:\Users\user\Desktop\NewProgram\ReactN\my-app\android\local.properties'.

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 2m 53s

error Failed to install the app. Make sure you have the Android development environment set up: https://reactnative.dev/docs/environment-setup. Error: Command failed: gradlew.bat app:installDebug -PreactNativeDevServerPort=8081

FAILURE: Build failed with an exception.

What went wrong: Could not determine the dependencies of task ':app:compileDebugJavaWithJavac'.

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 'C:\Users\user\Desktop\NewProgram\ReactN\my-app\android\local.properties'.

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 2m 53s

at makeError (C:\Users\user\Desktop\NewProgram\ReactN\my-app\node_modules\@react-native-community\cli-platform-android\node_modules\execa\index.js:174:9)
at C:\Users\user\Desktop\NewProgram\ReactN\my-app\node_modules\@react-native-community\cli-platform-android\node_modules\execa\index.js:278:16
at processTicksAndRejections (node:internal/process/task_queues:96:5)
at async runOnAllDevices (C:\Users\user\Desktop\NewProgram\ReactN\my-app\node_modules\@react-native-community\cli-platform-android\build\commands\runAndroid\runOnAllDevices.js:109:5)
at async Command.handleAction (C:\Users\user\Desktop\NewProgram\ReactN\my-app\node_modules\@react-native-community\cli\build\index.js:192:9)

info Run CLI with --verbose flag for more details.

CodePudding user response：

Go to your React-native Project -> Android Create a file local.properties Open the file paste your Android SDK path like below

in Windows sdk.dir = C:\\Users\\USERNAME\\AppData\\Local\\Android\\sdk
in macOS sdk.dir = /Users/USERNAME/Library/Android/sdk
in linux sdk.dir = /home/USERNAME/Android/Sdk

Replace USERNAME with your user name

Now, Run the react-native run-android in your terminal.

CodePudding user response：

open android studio and choice your device and run