Could not open settings generic class cache for settings file ' - flutter

Question

I reinstalled my android studio since the sdk was not found and so on. After re installing java jdk and android studio , everything worked well until I got an error saying 'Could not initialize class org.codehaus.groovy.runtime.InvokerHelper' which I solved by changing the Gradle version. And now the error is 'Type 'FlutterTask' property 'assets' is missing an input or output annotation.'
FAILURE: Build failed with an exception.
What went wrong:
Could not open settings generic class cache for settings file 'C:\Users\loran\ASProjects\xylophone-flutter\android\settings.gradle' (C:\Users\loran.gradle\caches\6.8.2\scripts\4mawlyb2l5e9tefyvnpxva1kg).
BUG! exception in phase 'semantic analysis' in source unit 'BuildScript' Unsupported class file major version 60
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 46s
Exception: Gradle task assembleDebug failed with exit code 1

Answer 1

I also had this problem So I did install java 8
You might have Java 13 So install Java 8

Answer 2

Java JDK 16 is the one that seems to lead to this issue try downgrading by downloading a lower version of JDK preferable JDK 8 or 11
To future individuals who will run to this error. Here is the link to download the JDK enjoy your coding experience don't forget to change the path too.
https://www.oracle.com/java/technologies/javase-downloads.html

Answer 3

mainly you have jdk16 i tried to install java 8 and set env to java 8 it worked for me

Answer 4

Try installing the latest Gradle package gradle-7.1.1, if you are using Java JDK 16 installed. To do this open android/gradle/wrapper/gradle-wrapper.properties file and under distribution url, update the gradle version to 7.1.1 (or the latest). After that, inside your Flutter project directory, run the following command in the terminal:
cd android && ./gradlew

Answer 5

I removed the JAVA_HOME path to the JAVA download and changed JAVA_HOME path to the following:
C:\Program Files\Android\Android Studio\jre
I am now coding

Answer 6

FOUND IT !
No need to change your JDK version, follow the steps to resolve the issue:
check your java version and remember it, use "java -version" in terminal
go to your android studio path installation
then in: Android Studio/jre/ open the file named "release"
take attention of the value of JAVA_VERSION field
if it's not the same as the java version on your computer, just change it with the version installed on your computer.
That's it, i hope it will resolve your issue like it resolves mine.
Try it and give a feedback.

Answer 7

Try this!
Remove package android from the top of settings.gradle. This helped me out.

Answer 8

If this error occurs, this might because you have installed the latest JDK such as JDK 16. You download and install JDK 8 and uninstall JDK 16. Then restart the desktop/laptop and try launch and run flutter run again. It should be working fine.

Answer 9

In my case, on Windows 10, my JAVA_HOME was set to JAVA SE 16 C:\Program Files\Java\jdk-16 and when I looked at the release file in java jre in android studio, C:\Program Files\Android\Android Studio\jre\release, I found that the the JAVA_VERSION WAS "11.0.10" (java 11) for short. So I changed the java installation on my PC to Java 11, update JAVA_HOME in my environment variables to point to the new java (C:\Program Files\Java\jdk-11.0.12) and restarted android studio, Then everything worked.
You can get your java 11 from here.
https://www.oracle.com/java/technologies/javase-jdk11-downloads.html. Change 11 to 8, 16 etc to get the download link for the java version you need.

Answer 10

The problem has to do with having Java 13 or 16 installed on your computer. The current version of Flutter does not work with Java 13 and 16. Just uninstall either of these that you may have installed and installed Java 8 or Java 11. Restart your computer to effect the update. Everything should be fine afterwards

Answer 11

I got this error when using flutter. I fixed it ensuring the android-studio-dir path was set correctly.
You set it up using flutter config --android-studio-dir="android studio path".
Then run flutter doctor and ensure flutter can see Android Studio

Answer 12

In 'adnroid/gradle/wrapper/gradle-wrapper.properties'
Change distributionUrl to version 7.0.1
In 'android/build.gradle'
Change 'com.android.tools.build:gradle' to version 4.2.0

Answer 13

Java 11 is the only supported version by Flutter as for now. It compiles and installs.
Previously I had this error using Java 19 and Java 8.

Answer 14

You might want update your gradle version.
Check the supported gradle <-> kotlin <-> java version on their page.

Answer 15

You can try this, it works for me.
Open the android module to a new window and automatically download all necessary libraries after successfully building finished run the app.

Answer 16

Simply go to your Android Studio path -> C:\Program Files\Android\Android Studio
open jbr folder -> copy all files -> then go back -> paste all the files in the jre folder and "replace the files in the destination".
It works for me in two different laptops. I have latest jdk version - 19.0.2

Answer 17

The error message you're seeing is related to the flutter build process and it occurs when a required input or output annotation is missing from the assets property of the FlutterTask.
task buildFlutter(type: FlutterTask) {
// Add the #Input annotation to the assets property
#Input List<String> assets = ["assets/images/", "assets/fonts/"]
}

Answer 18

Try to disable AVAST, check system vatiables path for JDK and SDK, clear cache with yarn.