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I didn't change anything in my Flutter application and it was running perfectly but when i tried running on real device i got this exception FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':bluetoothadapter:compileDebugJavaWithJavac'.
> Could not find tools.jar. Please check that C:\Program Files\Java\jre1.8.0_321 contains a valid JDK installation.

BUILD FAILED in 13s
Exception: Gradle task assembleDebug failed with exit code 1
Muhammed Ramadan
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1 Answers1

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Check out this post for a workaround:

tools.jar seems to be not in Android Studio classpath on Windows 8

It seems, the tools.jar is not present on every version of Java 8 anymore. Also make sure to use a JDK and not a pure JRE for development.

Maybe it is worth downloading a current version of the JDK from https://adoptopenjdk.net

Tim Brückner
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