I have an android project contains a module.
I added a library named lib to the project, then I added a jar (jar I have created in an other project). then clicked file –> project structure –> choose my module –> dependencies –> added a jar dependency. When I try to create the apk I get the following error:

Execution failed for task ‘:app:preDexDebug’. com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process ‘command ‘C:Program FilesJavajdk1.8.0_60binjava.exe” finished with non-zero exit value 1

I have tried to change the scope dependency to provided, which did not helped, Also I have tried to create new module the have a dependency in the jar, that did not work.
my build.gradle:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 22
    buildToolsVersion "23.0.1"
    defaultConfig {
        applicationId "com.myprj"
        minSdkVersion 15
        targetSdkVersion 22
        versionCode 1
        versionName "1.0"

    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    productFlavors {
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile 'com.android.support:appcompat-v7:22.2.0'
    compile 'com.android.support:support-v4:22.2.0'
    'com.sun.jersey:jersey-client:1.18.1'
    'com.sun.jersey:jersey-json:1.18.1'
    'org.codehaus.jackson:jackson-jaxrs:1.1.1'
    'com.owlike:genson:0.99'
    provided files('libs/MyJar.jar')
}

any suggestions?

UPDATE

I solved my problem, the other jar was compiled with java 1.8 settings, I changed it to 1.7 and recreated the jar, that solved my problem.

Answer

Remove this line:

provided files('libs/MyJar.jar')

You’re already including every .jar in libs directory a couple of lines above:

compile fileTree(include: ['*.jar'], dir: 'libs')