Stuck on an issue?
Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.
And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.
"Could not find tools.jar." error with react-native run-android
See original GitHub issueIssue Description
Is this a bug report?
Yes
Have you read the Contributing Guidelines?
Yes
Environment
Environment: OS: Windows 10 Node: 8.9.1 Yarn: 1.3.2 npm: 5.5.1 Watchman: Not Found Xcode: N/A Android Studio: Version 2.3.0.0 AI-162.4069837
Packages: (wanted => installed) react: 16.0.0 => 16.0.0 react-native: 0.50.3 => 0.50.3
Target Platform: Android
Steps to Reproduce
react-native init AwesomeProject cd AwesomeProject react-native run-android
Expected Behavior
The app is built and installed on my running VM.
Actual Behavior
I get this error:
Could not find tools.jar. Please check that "C:\Program Files\Java\jre1.8.0_151" contains a valid JDK installation.
I had to set JAVA_HOME in my system environment variables to make it work.
What happens is that in gradlew.bat RN checks for java.exe to test if it has found a valid JDK folder. But in my case it has found java.exe in a JRE folder which does not contain tools.jar.
Documentation should be updated on this page https://facebook.github.io/react-native/docs/getting-started.html and/or the error message should be improved adding “… or set JAVA_HOME to a valid one.”.
Issue Analytics
- State:
- Created 5 years ago
- Reactions:3
- Comments:5
Top Results From Across the Web
Top Related Medium Post
Top Related StackOverflow Question
Troubleshoot Live Code
Top Related Reddit Thread
Top Related Hackernoon Post
Top Related Tweet
Top Related Dev.to Post
Top Related Hashnode Post
I experience similar error when i was setting up react-native for window OS/Android. I followed the steps on how to setup reactive-native using the option that support the use of android studio emulator to display app https://facebook.github.io/react-native/docs/getting-started.html
In one of the steps I’m require to run this code choco install -y nodejs.install python2 jdk8
I got this error
Other packages (node.js & python) was successfully installed but JDK8 always fail to install. This was the fix that I used.
Follow the instruction and JDK8 will be successfully install. Then you can run react-native init AwesomeProject cd AwesomeProject react-native run-android
I’ve research a lot on this issue. working event for me : I removed Jdk, set it up again, and the problem is solved.