How to solve Error: ':app:transformClassesWithJarMergingForDebug'.?

Question

I have been tried all solutions, which are all related my question in the stack overflow and google too. i fed up with this error as long.

Am using lib for scanning qr code which is added in the below gradle file, so upon i add this lib only am getting the following error

this is my build.gradle

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.2"

    defaultConfig {
        applicationId "com.inspirenetz.app.inpartner"
        minSdkVersion 19
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
        multiDexEnabled true
        testInstrumentationRunner "com.google.android.apps.common.testing.testrunner.GoogleInstrumentationTestRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    packagingOptions {
        exclude 'META-INF/DEPENDENCIES.txt'
        exclude 'META-INF/LICENSE.txt'
        exclude 'META-INF/NOTICE.txt'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/DEPENDENCIES'
        exclude 'META-INF/notice.txt'
        exclude 'META-INF/license.txt'
        exclude 'META-INF/dependencies.txt'
        exclude 'META-INF/LGPL2.1'
    }

    testOptions {
        unitTests.returnDefaultValues = true
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    testCompile 'org.json:json:20140107'
    compile 'com.android.support:appcompat-v7:23.1.0'
    compile 'com.android.support:design:23.1.0'
    compile 'com.android.support:support-v4:23.1.0'
    compile 'com.github.satyan:sugar:1.4'
    compile 'com.google.code.gson:gson:2.4'
    compile 'com.fasterxml.jackson.core:jackson-core:2.4.1'
    compile 'com.fasterxml.jackson.core:jackson-annotations:2.4.1'
    compile 'com.fasterxml.jackson.core:jackson-databind:2.4.1'
    compile group: 'cz.msebera.android' , name: 'httpclient', version: '4.4.1.1'

    compile 'com.embarkmobile:zxing-android-minimal:2.0.0@aar'
    compile 'com.embarkmobile:zxing-android-integration:2.0.0@aar'
    compile 'com.google.zxing:core:3.2.1'

    // Avoid the 64K limit, Multidex support for Android 5.0 and higher
    compile 'com.android.support:multidex:1.0.1'

    compile files('libs/mswiperAPIVer2.0.jar')

    repositories { mavenCentral()
        maven { url "https://raw.github.com/embarkmobile/zxing-android-minimal/mvn-repo/maven-repository/" }
    }

}

Here hell of the error killing me

Error:Execution failed for task ':app:transformClassesWithJarMergingForDebug'.

com.android.build.api.transform.TransformException: java.util.zip.ZipException: duplicate entry: com/google/zxing/aztec/AztecDetectorResult.class

Would really appreciated some expected solution will solve many related questions too

Thanks in advance.!

This is in no way an answer to your problem but.. If the problem lies in `zxing`, then you can always switch to e.g. the `google.vision.barcode` instead. It's the Google default barcode library shipped in the support lib. Probably [this post](https://www.varvet.com/blog/android-qr-code-reader-made-easy/) will get you up and running with a QR reader in no time! — Algar, Nov 25 '16 at 09:26
oh my goodness at last i got reply on this question thanks.!, but may i know are you using this code and about its performance — Raju, Nov 25 '16 at 09:34
actually the above lib also working well for me one project but upon i try to add another project its throws this error — Raju, Nov 25 '16 at 09:36
Was that a question in your first reply...? And yeah, or course `zxing` should work, I'm not sure what your error is due to. — Algar, Nov 25 '16 at 10:10
your post also not help same error from long days i can't solve this — Raju, Dec 02 '16 at 15:07

score 0 · Accepted Answer · edited May 23 '17 at 12:08

At last i found the solution of my question from this post after long days back. and i have changed the lib for QR/Bar code scanner as well.

Problem: I using the jar externally name as core.jar. so, the AztecDetectorResult.class already contain in core.jar and in my scanner lib dependency core-3.2.1 too. so its throws the duplicate entry error as below.

com.android.build.api.transform.TransformException: 
java.util.zip.ZipException: duplicate entry: com/google/zxing/aztec/AztecDetectorResult.class

Solution: I tried to exclude it from the core.jar as below.

configurations{
    all*.exclude module: 'core'
}

And i have changed my new lib too ZXing Android Embedded for efficient QR/Bar code scanner.

Now its working like charm.!

score 0 · Answer 2 · edited Sep 05 '17 at 04:19

0

Problem:

I find out I am not only contain core.jar ,but also compile zxing related remote repository, so it result in the error above.

Solution:

The solution is deleting the core.jar file then it's ok.

edited Sep 05 '17 at 04:19

answered Sep 05 '17 at 01:59

peter chen

21
2

I'm not quite sure **what** this is; it appears to be both an unrelated question and the solution to the unrelated question. You should write this as a new question (possibly linking to this question as reference), and then answer with your solution. You can find more information about self-answering questions [**here**](https://stackoverflow.com/help/self-answer). – Obsidian Age Sep 05 '17 at 03:35

How to solve Error: ':app:transformClassesWithJarMergingForDebug'.?

2 Answers2