Adding plain java lib .jar to Android project throws bad class file magic or version

Question

So I have an executable Android project, it runs and works well. I have made a library for it, separate project, only using java, not Android framework.

No I would like to make a .jar from my library and add it to my Android Proejct.

I have made it so far, but when I run it I get the following error:

in short:

Caused by: com.android.dx.cf.iface.ParseException: bad class file magic (cafebabe) or version (0034.0000)

In long.

I have added the .jar dependency to my gradle file: (It is the task_server_core.jar)

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile files('libs/task_server_core.jar')
    compile 'com.android.support:appcompat-v7:21.+'
}

And both projects made with java 1.8.0_45

What m I doing wrong?

Possible duplicate of [Bad class file magic or version](http://stackoverflow.com/questions/24662801/bad-class-file-magic-or-version) — OneCricketeer, Apr 18 '16 at 12:29
@cricket_007 Should I just change to java 7 for both projects and do it again and it should work? — Adam Varhegyi, Apr 18 '16 at 12:34
I don't have your jar file, but it's worth trying. There are a few things in that link you can do, also — OneCricketeer, Apr 18 '16 at 12:36

score 0 · Answer 1 · answered Apr 18 '16 at 13:41

0

Changed both Android project's and java lib project's JAVA version to 1.7 solved the problem.

answered Apr 18 '16 at 13:41

Adam Varhegyi

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Adding plain java lib .jar to Android project throws bad class file magic or version

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