Flutter build error for the first time :Could not open settings remapped class cache for 7yvt6la2007dno98lt3rzbguf

问题

I just downloaded flutter and try to learn emulator with the first default code which google offered. But it does not run at all!

I plug in dart and flutter. I also changed the order of jcenter() and google() too

like this:

buildscript {
    ext.kotlin_version = '1.3.50'
    repositories {
        jcenter()
        google()
    }


dependencies {
        classpath 'com.android.tools.build:gradle:3.5.0'

        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

allprojects {
    repositories {
        jcenter()
        google()

    }
}

And the error is:

Launching lib/main.dart on Android SDK built for x86 in debug mode... Running Gradle task 'assembleDebug'...

FAILURE: Build failed with an exception.

What went wrong: Could not open settings remapped class cache for 7yvt6la2007dno98lt3rzbguf (/Users/[myname]/.gradle/caches/5.6.2/scripts-remapped/settings_7iv4l88jiyzeatj2wku74hwcv/7yvt6la2007dno98lt3rzbguf/settings8410a2d21ed2f87c8a0398566330ee52).

Could not open settings generic class cache for settings file '/Users/[myname]/AndroidStudioProjects/test_app/android/settings.gradle' (/Users/[myname]/.gradle/caches/5.6.2/scripts/7yvt6la2007dno98lt3rzbguf/settings/settings8410a2d21ed2f87c8a0398566330ee52). BUG! exception in phase 'semantic analysis' in source unit 'BuildScript' Unsupported class file major version 57
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 568ms Finished with error: Gradle task assembleDebug failed with exit code 1

Any advice(( THANKS!

回答1:

I got it! My current java version was 12 and I downgraded it to Java 8. Then everything works fine.

I'll leave it, hoping it can help somebody struggling in the future will

来源：https://stackoverflow.com/questions/60142464/flutter-build-error-for-the-first-time-could-not-open-settings-remapped-class-c

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