I'm setting up Flutter for the first time and came across this error. I was told to find the java_home variable somewhere in a java folder but running automatic scans and manually searching has come up empty-handed. Do I have to download something external or is it just very hard to find? Any help is appreciated.
Launching lib\main.dart on AOSP on IA Emulator in debug mode...
Running Gradle task 'assembleDebug'...
ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation.
Exception: Gradle task assembleDebug failed with exit code 1
I think this might help.
https://confluence.atlassian.com/doc/setting-the-java_home-variable-in-windows-8895.html
You need to set the environment variable JAVA_HOME in your machine
I am a beginner in flutter application development. And when I Run my flutter default project code on emulator, I face this issue:
Launching lib\main.dart on AOSP on IA Emulator in debug mode...
Running Gradle task 'assembleDebug'...
FAILURE: Build failed with an exception.
What went wrong:
Could not open settings generic class cache for settings file 'C:\Users\Administrator\StudioProjects\myapp\android\settings.gradle' (C:\Users\Administrator.gradle\caches\6.7\scripts\1fnwrr8g4rohfp291nvlxj5qe).
BUG! exception in phase 'semantic analysis' in source unit 'BuildScript' Unsupported class file major version 60
Make sure you have the JAVA_HOME in your environment variables.
Example for path:
C:\Program Files\Java\jdk-16.0.2
And check that the flutter doctor is running successfully:
flutter doctor
a guide to setting the JAVA_HOME variable in Windows
https://confluence.atlassian.com/doc/setting-the-java_home-variable-in-windows-8895.html
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
I also had this problem So I did install java 8
You might have Java 13 So install Java 8
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
mainly you have jdk16 i tried to install java 8 and set env to java 8 it worked for me
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
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
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.
Try this!
Remove package android from the top of settings.gradle. This helped me out.
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.
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.
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
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
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
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.
You might want update your gradle version.
Check the supported gradle <-> kotlin <-> java version on their page.
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.
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
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/"]
}
Try to disable AVAST, check system vatiables path for JDK and SDK, clear cache with yarn.
when using the command flutter doctor --android-licenses
ERROR: JAVA_HOME is set to an invalid directory: C:\Program Files\Java\jdk-12.0.2
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation.
I did everything needed and the problem was not solved
Anyone here for help?
I am fairly new to React native and trying to set up Android environment with Visual studio. All the installation has been fairly successful, however, when I try to run the sample app on the android emulator executing the npx react-native run-android command it shows below error -
'C:\Users\Home' is not recognized as an internal or external command,
operable program or batch file.
error Failed to launch emulator. Reason: Could not start emulator within 30 seconds..
Starting a Gradle Daemon, 1 incompatible and 1 stopped Daemons could not be reused, use --status for details
java.lang.NoClassDefFoundError: Could not initialize class org.codehaus.groovy.vmplugin.v7.Java7
at org.codehaus.groovy.vmplugin.VMPluginFactory.<clinit>(VMPluginFactory.java:43)
at org.codehaus.groovy.reflection.GroovyClassValueFactory.<clinit>(GroovyClassValueFactory.java:35)
at org.codehaus.groovy.reflection.ClassInfo.<clinit>(ClassInfo.java:109)
However, when i execute adb devices on visual studio, it shows the list of emulator connected -
List of devices attached
emulator-5554 device
What could be the possible reason? Is this because my users name is Home PC? (Is this because there is a space in between) and it is not able to get the correct path?
This is because your java version is updated to the latest version and gradle is not supported with the installed version. what you can do is update the gradle as well
So go to gradle/wrapper folder inside the android folder
Edit gradle-wrapper.properties file and replace distributionUrl
with following value
https\://services.gradle.org/distributions/gradle-6.3-all.zip
distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-all.zip
I too faced the same issue.The problem is with the JDK. From JDK 14 i downgraded to JDK 11(LTS) version. And it worked.
Hope it helps.
Install Java 8 version, which is available Java 8 download
Gradle is not keeping up with the Java Latest versions, so roll back
to previous versions