react-native run-android fails from terminal

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D:\ReactNative\AwesomeProject>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 4 workers... info Starting JS server... 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... :ReactNative:Cannot run program "npx": CreateProcess error=2, The system cannot find the file specified :ReactNative:Automatic import of native modules failed.

FAILURE: Build failed with an exception.

  • Where: Script 'D:\ReactNative\AwesomeProject\node_modules@react-native-community\cli-platform-android\native_modules.gradle' line: 169

  • What went wrong: A problem occurred evaluating script.

    Cannot invoke method getErrorStream() on null object

  • 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 1s

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.

  • Where: Script 'D:\ReactNative\AwesomeProject\node_modules@react-native-community\cli-platform-android\native_modules.gradle' line: 169

  • What went wrong: A problem occurred evaluating script.

    Cannot invoke method getErrorStream() on null object

  • 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 1s

at checkExecSyncError (child_process.js:621:11)
at execFileSync (child_process.js:639:15)
at runOnAllDevices (D:\ReactNative\AwesomeProject\node_modules\@react-native-community\cli-platform-android\build\commands\runAndroid\runOnAllDevices.js:94:39)
at processTicksAndRejections (internal/process/task_queues.js:93:5)
react-native
9 Answers

For me the problem was over this cli: 

@react-native-community/cli-platform-android

The problematic version: 

3.0.0-alpha.7

Just run this to install the latest stable release:

npm i @react-native-community/cli-platform-android@2.9.0

UPDATE 2020:

if this workaround doesn't work now, take a look over this link to use the latest version from the repo, and look the version of your cli to compare and use the correct one:

https://www.npmjs.com/package/@react-native-community/cli-platform-android
user_7529000

Had the same problem on linux. All I had to do was just installing npx globally to my machine, that's all.

sudo npm install -g npx

This happens because of lines 155 and 159 in native_modules.gradle:

def command = "${npx} --quiet react-native config"

...

cmdProcess = Runtime.getRuntime().exec(command)

It tries to execute the command but command npx is not found.

user_9872440

I have copied and replaced this file from the older project and it did the trick for now.

node_modules@react-native-community\cli-platform-android\native_modules.gradle'

user_94770940

For me, I had not closed a tag in my AndroidManifest.xml file.

user_98475020

I had same issue and to get it sorted you have downgrade your react-native version or create project with custom react-native version .
react-native init AwesomeProject --version X.XX.X
react-native init myfirstProject --version 0.60.0
(from official react native documentation) .
https://facebook.github.io/react-native/docs/getting-started
Now you can either run it directly from Command line or open Android studio and then open Android folder of react native app in that ( it will sync gradles files and build ).

user_68378170

A temporary fix was suggested on github about making changes to your native_modules.gradle file. You need to go to that file location YourProjectDir\node_modules@react-native-community\cli-platform-android\native_modules.gradle and at line 153, change npx --quiet react-native config to npx.cmd --quiet react-native config.

Original answer

user_47414700
user_102577670

In Windows

Set environment variable

System Variable > Path > C:\Users\ ankit\ .WebStorm2019.3\config\node\node-v12.13.1-win-x64

user_34061350

For solove this preblem first use this command

yarn install

then,

npx react-native start

and ,

npx react-native run-android
user_94990240
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