Dex Error while building the project

Question

I am getting the following error when I try to build my project. This error occurs when I was trying to add JavaMail api in my project.

     Error:Execution failed for task ':app:transformDexArchiveWithExternalLibsDexMergerForDebug'.
> com.android.builder.dexing.DexArchiveMergerException: Unable to merge dex

This is my gradle file:

    apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    defaultConfig {
        applicationId "com.persi.eatery"
        minSdkVersion 21
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

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

        exclude 'META-INF/mailcap.default'
        exclude 'META-INF/mimetypes.default'
    }
    defaultConfig {
        multiDexEnabled true
    }        
}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
    implementation 'com.android.support:design:26.1.0'
    implementation 'com.google.firebase:firebase-database:11.8.0'
    implementation 'com.google.firebase:firebase-auth:11.8.0'
    implementation 'com.sun.mail:android-mail:1.6.1'
    implementation 'com.sun.mail:android-activation:1.6.1'
    implementation project(':library')

}

apply plugin: 'com.google.gms.google-services'

My library gradle:

apply plugin: 'com.android.library'

android {
    compileSdkVersion 23
    buildToolsVersion '26.0.2'

    defaultConfig {
        minSdkVersion 8
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }

}

Project gradle file

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {

    repositories {
        google()
        jcenter()
        maven {
            url "https://maven.java.net/content/groups/public/"
        }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'
        classpath 'com.google.gms:google-services:3.1.1'


        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

P.S I have already tried Clean project followed by rebuild project as suggested in other answers but its still not working.Thanks in advance Unable to merge dex

you can try to remove line from library gradle "buildToolsVersion '26.0.2'" just try. — Saif, Feb 19 '18 at 11:22
also try to change your library "compileSdkVersion " and "targetSdkVersion " to 26 — Saif, Feb 19 '18 at 13:00

score 0 · Answer 1 · edited Mar 07 '18 at 15:25

0

You have a dependencies conflict. Try to see your dependencies via command ./gradlew app:dependencies (Details here ). And you will see the next situation:

As you can see android-mail depends on android-activation. I think you don't need to use the line implementation 'com.sun.mail:android-activation:1.6.1'

P.S. For debugging builds you can use the next flag "--stacktrace". Then you can see more information about your issue.

edited Mar 07 '18 at 15:25

mikhail-t

4,103
7
36
56

answered Mar 07 '18 at 15:05

Den

23
5

Updated your post. To make your images show please use "Add Image" (Ctrl + G) button in the answer editor, it will insert correct markdown code. – mikhail-t Mar 07 '18 at 15:27
1

@mik-t Thanks. I have too little reputation to do that. I can add only a link. – Den Mar 07 '18 at 16:03
oh! I didn't realize that you need certain reputation for full images, good to know. – mikhail-t Mar 07 '18 at 21:11

Dex Error while building the project

1 Answers1