android - How to solve (Could not initialize class org.codehaus.groovy.reflection.ReflectionCache) issue in react native

Question

$ npx react-native run-android 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... error Failed to launch the emulator. Reason: Could not start an emulator within 30 seconds. warn Please launch an emulator manually or connect a device. Otherwise, the app may fail to launch. info Installing the app...

FAILURE: Build failed with an exception.

• What went wrong: Could not initialize class org.codehaus.groovy.runtime.InvokerHelper

• 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 1m 23s

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

FAILURE: Build failed with an exception.

• What went wrong: Could not initialize class org.codehaus.groovy.runtime.InvokerHelper

• 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 1m 23s

at checkExecSyncError (child_process.js:629:11)
at execFileSync (child_process.js:647:13)
at runOnAllDevices (E:work
eact-nativeAwesomeProject1
ode_modules@react-native-communitycli-platform-androiduildcommands
unAndroid
unOnAllDevices.js:94:39)

Answer 1

I think I had the same issue. After installing RN (May 20th, 2020), I bumped into this error. I found this solution on https://github.com/gradle/gradle/issues/10248.

In short:

1. Go to /android/gradle/wrapper/gradle-wrapper.properties file in your RN project

2. Find this line that starts with distributionUrl. Change the gradle version into gradle-6.3-all.zip.

In my project, it was:

distributionUrl=https://services.gradle.org/distributions/gradle-6.0.1-all.zip

and I changed it into:

distributionUrl=https://services.gradle.org/distributions/gradle-6.3-all.zip

That's it.