Im getting this error when trying to run a react-native up exception in thread main unknown exception anyone to help | SoloLearn: Learn to code for FREE!

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Im getting this error when trying to run a react-native up exception in thread main unknown exception anyone to help

4/5/2020 12:14:07 PM

calvin

17 Answers

New Answer

+4

Sorry Gordon, I can't help. I don't use Android Studio

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Javier Felipe Toribio Thanks for your reply.

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Alright, from the error message, you need an Android development environment. Follow the tutorials on this page: https://reactnative.dev/docs/environment-setup Go through the Expo CLI installation process. When testing your app, use a real Android device to scan the QR code to run the app.

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Development OS: Windows? Target OS: Android? Have you done step 3 and 4? Configure ANDROID_HOME environment variable Add platform-tools to Path This guy says in Jan 2020 that he has same problem as you, he solved by uninstalling and reinstalling Java https://stackoverflow.com/questions/59728755/command-failed-gradlew-bat-appinstalldebug-preactnativedevserverport-8081 `Turns out I had a problem with my Java. I uninstall JDK and JRE and reinstall the latest version and it worked out for me.` The Java JDK and JRE version must be latest.

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Not sure, havn't installed Java IDE on my computer. Danijel Ivanović, do you know about JRE version?

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calvin Don't worry, a Java expert will come up. Just in case Danijel is busy, let me find one more Java expert I know. Javier Felipe Toribio Is there something you can share with us, regarding JRE version, especially for Android Studio?

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What's the exception?

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Why is Gradle involved? Which tutorial are you following? Can you give me a link to examine?

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Have your been solved?

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Danijel Ivanović must have missed my tag yesterday Hello Danijel, have you used ReactNative with ReactNative CLI? Any chance you can help this asker? Gordon Sorry my friend, I didn't work with. calvin Maybe here you can find something useful : • https://reactnative.dev/docs/0.5/getting-started

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How do I post an image here

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Here is the error: Error failed to install the app. Make sure you have the Android development environment set up: https://reactnative Dev/docs/getting-started.html#android-development-environment. run cli with --verbose flag for more details. Error command failed: gradlew.bat app: installDebug-preactnativedevserverport=8081 Exception in thread "main" java.net.connectexception: connection timed out: connect

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Yah I know that I was trying to use react-native with Android studio because expo has some limitations and I did go through the tutorials on the page and did everything that was asked but it's still giving me an error I think it's something to do with gradle

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https://reactnative.dev/docs/environment-setup then you go to react-native cli quickstart

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Ok thanks

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I already have Java 14 installed maybe the problem is the jre but don't they come as a package?

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When I googled it it seems Java and jre version are the same