Unsupported major minor version 52 0 in my app

Question

I m trying to compile my Android project and I m getting this error   INFO  Exception in thread  main  java lang UnsupportedClassVersionError  com android dx command Main   Unsupported major minor version 52 0  INFO   at java lang ClassLoader defineClass1 Native Method   INFO   at java lang ClassLoader defineClass ClassLoader java 800   INFO   at java security SecureClassLoader defineClass SecureClassLoader java 142   INFO   at java net URLClassLoader defineClass URLClassLoader java 449   INFO   at java net URLClassLoader access 100 URLClassLoader java 71   INFO   at java net URLClassLoader 1 run URLClassLoader java 361   INFO   at java net URLClassLoader 1 run URLClassLoader java 355   INFO   at java security AccessController doPrivileged Native Method   INFO   at java net URLClassLoader findClass URLClassLoader java 354   INFO   at java lang ClassLoader loadClass ClassLoader java 425   INFO   at sun misc Launcher AppClassLoader loadClass Launcher java 308   INFO   at java lang ClassLoader loadClass ClassLoader java 358   INFO   at sun launcher LauncherHelper checkAndLoadMain LauncherHelper java 482   INFO  ------------------------------------------------------------------------  INFO  BUILD FAILURE  INFO  ------------------------------------------------------------------------   I ve been reading in other post that try to compile with Java 8 might cause that error but not my case  I have the following Java version   java version  1 7 0 79  OpenJDK Runtime Environment  IcedTea 2 5 5   7u79-2 5 5-0ubuntu0 14 04 2  OpenJDK 64-Bit Server VM  build 24 79-b02  mixed mode    OS  Linux Mint  I m not have Java 8 installed   Build  MAVEN  Can anyone help me with this

User · Answer

unsupported-major-minor-version error can be because of unsupported JDK version  Update JDK  Go to Module Settings and change the JDK path to the new one  In most of the cases  it fixes the error

User · Answer

Initially I had downgraded buildToolsVersion from 24 0 0 rc3 to 23 0 3  as specified in Rudy Kurniawan s answer  Then I have noticed that I have jdk 7 specified in my project settings  I have changed it to jdk 8 and now build tools 24 0 0 rc3 work     It s also important to have compile options set to java7   android               compileOptions           sourceCompatibility JavaVersion VERSION 1 7         targetCompatibility JavaVersion VERSION 1 7

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I am on cordova  here s what I ve done   -  rename your android project  so that there s space for new one -  update JAVA Development Kit to 1 8  latest one in time of writing this  -  run cordova platform add android     Should work without problems now  Your app hash will change  so if you are using it f e  for facbeook login  you will need to update it

User · Answer

Get this error message on the travis build server   I fixed my travis build with  buildToolsVersion  24 0 2  using this     travis build  language  android  jdk    - oraclejdk8  android    components      - tools     - build-tools-24 0 2     - android-23      - add-on     - extra  script    - jdk switcher use oraclejdk8   -   gradlew assemble

User · Answer

You need to go into your SDK installation directory  and make sure that the  build-tools sub-directory matches the buildToolsVersion in your app s build gradle file

User · Answer

I had the same problem with my IntelliJ Maven build  My  solution  was to go into the build tools and remove the build tools 24 0 0 folder  I found it in the  android-sdk-location  build-tools  directory  This is not a long term fix  but this should at least get your project building again  Upgrading to Java 8 as many have suggested will be better long term

User · Answer

52 is the code for JDK 8   You can see that here  http   javarevisited blogspot com 2015 05 fixing-unsupported-majorminor-version html   So Gradle is expecting you to have JDK 8 as the default Java version on your machine   Newest versions of Gradle for Android won t work with Java 7   The solution is simple  make Java 8 the default jdk version on your machine

User · Answer

Got the same issue outside of Android Studio  when trying to build for Cordova using the sdk from command line  cordova build android     The solution provided by Rudy works in this case too  You just don t downgrade the version of Build Tools from Android Studio but you do it using the android sdk manager ui

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Thanks everyone for solution   I could solve my same problem using below solution   In my project  I added jar which were created in Java8  And my project was referring to JRE 7  When i changed project JRE to 8  My problem solved   Steps  In eclipse  right click on project name in project explorer   build path   Libraries   click on jre version   click edit   installed JRE   add   standerd VM   select JRE home click-path  path should be localePath java jdk1 8 0 25 jre    provide name   save   select same JRE for project   finish   ok Refresh build project once   try to run your java file  it should work

User · Answer

I just encountered this problem   Reverting from the  Preview Channel  versions of the SDK tools and build tools to the latest stable version fixed it

User · Answer

Your Android build tools are not properly installed  Try installing some other version of build tools and give that version in the gradle file  or you can go to this directory  C  Users  AppData Local Android sdk build-tools   and see which build tools is installed  Try changing the build tool version in the gradle file and compile the app to see if it is working   i had 22 0 1 23 0 02 and 24 0 0 versions of build tools and only the old 22 0 1 version worked   source  i tried it myself and it worked for me

User · Answer

This problem stems from the fact that your build tool version and JDK won t work together  I was using JDK version 7 with build tool 24 0 1  Of course lowering build tool version may fix the problem but it is not a real fix  as upgrading your build tools in future will break it again   You should make sure build tool version and JDK work together  I upgraded my build tool to latest  24 0 1  and installed jdk8  Make sure to set your JAVA HOME to latest and then try clean build

User · Answer

I had two versions of java jdk installed  Once I pointed to right version of java jdk in File- Project Structure -  SDK Location to the latest version which I had in JAVA HOME environment variable  the issue went away

User · Answer

I am on Android Studio 2 0 and facing the same problem   The solution provided by Rudy Kurniawan sorted out this issue  The affected file can be located by    Project  -   Android  -   Gradle Scripts  -   build gradle Module app    The   Project  pane is default on the left  To find it  inspect the name of the side tabs  click it  then use the top pull down box to get to  Android   Expand the tree in the pane to find the target file  Double-click it to edit

User · Answer

The Simplest  solution is you have to update your JDK to latest  version   Because  Cordova supports only latest JDK     1  First of all you have to update your Android SDK  Then   2  If you are not  able to update through your terminal    Got to your Software center of Linux destro and  search the Latest  which one you want to install  and install  that one    Then again run Cordova build      It will  solve the problem    In  my case it worked

User · Answer

I had the same problem and tried to change the version  sometimes is for the version of Android Studio in Project  Gradle Scripts  build gradle Module app  you can change the version  For example   android       compileSdkVersion   23       buildToolsVersion    23 0 3         defaultConfig           applicationId  com example android myapplication          minSdkVersion   19           targetSdkVersion   23           versionCode   1           versionName    1 0

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Check that you have the latest version of the SDK installed in either C  Program Files Java or C  Program Files  x86  Java  Then go to VS2015 and follow the path tools - options - Xamarin - Android settings and in the section JDK location select change and go to look for the version you have either x64 or x32

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The problem specified      Exception in thread  main  java lang UnsupportedClassVersionError    com android dx command Main   Unsupported major minor version 52    is caused when is declared inside the build gradle  buildToolsVersion 24 and we don  t have Java 8 installed that is required for this version  To solve this problem we have to change from buildToolsVersion from 24 to maximum 23     Java 8 must be required in the future for Android Studio  so we have to start using Java 8

User · Answer

From this question   You can try to change your compiler level back to 1 7 in the IDE you re using    If you re on Eclipse  go to Windows ---  Prefences then select Java and expand it then select Compiler and change the compliance level to 1 7  If you re on Android Studio  you can add this to your build gradle   android       compileSdkVersion 19     buildToolsVersion  19 0 0       defaultConfig           minSdkVersion 7         targetSdkVersion 19            compileOptions           sourceCompatibility JavaVersion VERSION 1 7         targetCompatibility JavaVersion VERSION 1 7            If this doesn t help  try checking other s answer in the link mentioned above and let us know what helped you

User · Answer

Gradle Scripts    build gradle  Module app   Change buildToolsVersion  24 0 0  to buildToolsVersion  23 0 3   source   experience

User · Answer

Sorry for the late reply Hope it helps someone else  This problem is related with your SDK  not with your JDK  You can check your version information from      Help   About   Show Details   You will get something like      Xamarin Android Version  6 0 2 1  Starter Edition  Android SDK    X  Android android-sdk      Supported Android versions       4 0 3  API level 15       4 4  API level 19       6 0  API level 23        SDK Tools Version  24 4 1       SDK Platform Tools Version  23 0 1       SDK Build Tools Version  24 rc2      Java SDK  X  Program Files  x86  Java jdk1 7 0 71       java version  1 7 0 71        Java TM  SE Runtime Environment  build 1 7 0 71-b14       Java HotSpot TM  Client VM  build 24 71-b01  mixed mode  sharing    If you are using preview tools for building  then you will get similar errors all over   What to do now   goto     Tools -  SDK manager    Select all items in preview channels including Android SDK build tools with rev 24rc2 or 24rc4 latest  Click on Delete  n  packages   How to turn off preview channel   In SDK manager  select      Tools   options  Uncheck Enable preview tools   And what  Back to your code  Clean all and rebuild  In rare cases  you have to select build-tools from project settings page

User · Answer

I d had this issue for too long  SO etc hadn t helped  and only just solved it  using sdk 25    -The local properties file proguard dir var was not applying with ant  I d specified 5 3 2  but a command line call and signed export build  eclipse  was using 4 7  from the sdk dir only 5  supports java 8   My solution was to replace the proguard jars  android-sdk tools proguard libs directory  in the sdk with a current  5   version of proguard

User · Answer

Changing com android tools build gradle 2 2 0-beta1 to com android tools build gradle 2 1 2 fixed it for me   My Android Studio version is 2 1 2  perhaps that s why

User · Answer

I face this problem too when making new project from android studio   I ve been able to resolve this by downgrading buildToolsVersion in app gradle  setting  change  module-name  build gradle line     buildToolsVersion  24 0 0 rc1    to      buildToolsVersion  23 0 3      Edit   In Android Studio 2 1 Go to File-  Project Structure- App -  Build Tool Version  Change it to 23 0 3  Do the method above  only when you are using java version 7 and for some reason do not want to upgrade to java 8 yet    Hope this helps

User · Answer

I also faced this problem when making a new project in eclipse    Open your eclipse installation directory  Open the file eclipse ini Modify   Dosgi requiredJavaVersion 1 6    to  Dosgi requiredJavaVersion 1 7    Hope this helps

User · Answer

What no one here is saying is that with Build Tools 24 0 0  Java 8 is required and most people have either 1 6 or 1 7    So yeah  setting the build tool to 23 x x would  solve  the problem but the root cause is the Java version on your system    On the long term  you might want to upgrade your dev environment to use JDK8 to make use the new language enhancements and the jack compiler

User · Answer

In my case the default jdk was 1 7 then I changed it to 1 8 by browsing to the exact folder where the updated jdk is found in

User · Answer

I installed Android Studio alongside to Xamarin Visual Studio  was already installed   After the installation  excluded SDK  because they were already installed  I started Android Studio and it downloaded  installed and added missing SDKs  after giving the path to the SDK location   As a result I got the error message on build     java lang UnsupportedClassVersionError  com android dx command Main     Unsupported major minor version 52 0   As a solution I installed jdk-8u101-windows-i586 exe without JRE  because it was already installed   Before I tried the x64 version  but it disappeared     Then you have to change the Java Development Kit location     This is done in Visual Studio by clicking Tools   Options   Xamarin   Android Settings  Here you can navigate to the correct location  In my case it was C  Program Files  x86  Java jdk1 8 0 101   Finally  clean your project and make a new build  -

[java] Unsupported major.minor version 52.0 in my app

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