title: com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives:
body: <p>I cannot compile my project, scenario i converted one of my activity to kotlin using Android Studio's "Convert Java File to Kotlin File" and fixed all errors for code that was not properly converted.</p>
  
  <p>Java complier log:</p>
  
  <blockquote>
    <p>Caused by: java.lang.RuntimeException: com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives: 
    <BR><BR><BR>
    com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives:<br>
    <BR><BR><BR>
    com.android.tools.r8.CompilationFailedException: Compilation failed to complete<br>
    <BR><BR><BR>
    com.android.tools.r8.utils.AbortException: Error: null, Cannot fit requested classes in a single dex file (# methods: 110666 > 65536 ; # fields: 67264 > 65536)   </p>
  </blockquote>
  
  <p><BR>
  <b>build.gradle (app)</b></p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  apply plugin: 'kotlin-android'
  
  apply plugin: 'kotlin-android-extensions'
  
  apply plugin: 'io.fabric'
  
  android {
      compileSdkVersion 28
      buildToolsVersion "28.0.3"
  
      defaultConfig {
          versionName "2.2.4"
          versionCode 13
  
          minSdkVersion 16
          targetSdkVersion 27
  
          testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
          vectorDrawables.useSupportLibrary = true
      }
  
      buildTypes {
          debug {
              applicationIdSuffix ".debug"
              versionNameSuffix ".d.5"
          }
  
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }
  
      flavorDimensions "server"
  
      productFlavors {
          prod {
              applicationId "com.test.test"
              dimension "server"
  
              buildConfigField "String", "SERVER_HOST", "\"http://www.test.com\""
          }
  
          dev {
              applicationId "dev.test.test"
              versionNameSuffix ".dev"
              dimension "server"
  
              buildConfigField "String", "SERVER_HOST", "\"http://localhost/test\""
          }
      }
  }
  
  dependencies {
      implementation fileTree(include: ['*.jar'], dir: 'libs')
      androidTestImplementation('androidx.test.espresso:espresso-core:3.1.0-alpha4', {
          exclude group: 'com.android.support', module: 'support-annotations'
      })
      implementation('com.crashlytics.sdk.android:crashlytics:2.7.1@aar') {
          transitive = true
      }
  
      implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
      implementation 'com.schibstedspain.android:leku:6.0.0'
  
      implementation 'com.github.sparklit:adbutler-android-sdk:1.0'
      implementation 'com.j256.ormlite:ormlite-core:5.0'
      implementation 'com.j256.ormlite:ormlite-android:5.0'
      implementation 'com.squareup.okhttp:okhttp:2.4.0'
      implementation 'androidx.appcompat:appcompat:1.0.0-beta01'
      implementation 'androidx.cardview:cardview:1.0.0-beta01'
      implementation 'androidx.recyclerview:recyclerview:1.0.0-beta01'
      implementation 'com.google.android.material:material:1.0.0-beta01'
      implementation 'androidx.vectordrawable:vectordrawable:1.0.0-beta01'
      implementation 'androidx.constraintlayout:constraintlayout:1.1.2'
      implementation 'androidx.legacy:legacy-support-v4:1.0.0-beta01'
      implementation 'com.google.android.gms:play-services-location:16.0.0'
      implementation 'com.google.firebase:firebase-core:16.0.7'
      implementation 'com.facebook.fresco:fresco:1.9.0'
      implementation 'com.jakewharton.timber:timber:4.7.0'
      implementation 'com.google.android.gms:play-services-maps:16.1.0'
      testImplementation 'junit:junit:4.12'
      def nav_version = "1.0.0-alpha09"
      implementation "android.arch.navigation:navigation-fragment:$nav_version"
      // use -ktx for Kotlin
      implementation "android.arch.navigation:navigation-ui:$nav_version"
      // use -ktx for Kotlin
  
      implementation 'pub.devrel:easypermissions:1.1.1'
      implementation 'devlight.io:navigationtabbar:1.2.5'
  }
  
  configurations.all {
      exclude group: 'com.google.guava', module: 'listenablefuture'
  }
  
  apply plugin: 'com.google.gms.google-services'
  
  repositories {
      mavenCentral()
  }
  </code></pre>
  
  <p><BR>
  <b>build.gradle (project)</b></p>
  
  <pre><code>buildscript {
      ext.kotlin_version = '1.3.11'
      repositories {
          google()
          jcenter()
          maven { url 'https://maven.fabric.io/public' }
      }
      dependencies {
          classpath 'com.android.tools.build:gradle:3.3.0'
          classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
          classpath 'com.google.gms:google-services:4.2.0'
          classpath 'io.fabric.tools:gradle:1.27.0'
      }
  }
  
  allprojects {
      repositories {
          google()
          jcenter()
          maven { url 'https://jitpack.io' }
          maven { url "https://maven.google.com" }
      }
  }
  
  task clean(type: Delete) {
      delete rootProject.buildDir
  }
  </code></pre>