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         


        

Answer 1

Gradle Scripts >> build.gradle (Module app)

Change buildToolsVersion "24.0.0" to buildToolsVersion "23.0.3"

source : experience

Answer 2

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 :-)

Answer 3

I also faced this problem when making a new project in eclipse.

1. Open your eclipse installation directory
2. Open the file eclipse.ini

3. Modify

   Dosgi.requiredJavaVersion=1.6 
   

   to

   Dosgi.requiredJavaVersion=1.7
   

Hope this helps

Answer 4

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.

Answer 5

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.

Answer 6

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.