title: Duplicate files copied in APK lib/x86/librealm-jni.so
body: <p>When I try to run my app, I get this error:</p>
  
  <pre><code>Error:Execution failed for task ':app:transformNativeLibsWithMergeJniLibsForDebug'.
  &gt; com.android.build.api.transform.TransformException: com.android.builder.packaging.DuplicateFileException: Duplicate files copied in APK lib/x86/librealm-jni.so
  File1: /home/redsolver/.gradle/caches/modules-2/files-2.1/io.realm/realm-android/0.84.1/b86074e6240f0f876701810a047b0261f7bd060e/realm-android-0.84.1.jar
  File2: /home/redsolver/.android/build-cache/d261e339af4d29c93448691068c64db176d00257/output/jni
  </code></pre>
  
  <p>I got this error after adding the realm database to my project.</p>
  
  <p>My app build.gradle:</p>
  
  <pre><code>apply plugin: 'com.android.application'
  apply plugin: 'realm-android'
      android {
          compileSdkVersion 25
          buildToolsVersion "25.0.2"
          defaultConfig {
              applicationId "net.redsolver.solver"
              minSdkVersion 19
              targetSdkVersion 25
              versionCode 1
              versionName "1.0"
              testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
              vectorDrawables.useSupportLibrary = true
          }
          buildTypes {
              release {
                  minifyEnabled false
                  proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
              }
          }
      }
  
  dependencies {
      compile fileTree(dir: 'libs', include: ['*.jar'])
      androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2',                 {
      exclude group: 'com.android.support', module: 'support-annotations'
      })
      compile 'com.android.support:appcompat-v7:25.1.1'
      compile 'com.android.support.constraint:constraint-layout:1.0.0-beta4'
      compile 'com.google.firebase:firebase-auth:10.0.1'
      compile 'com.google.firebase:firebase-database:10.0.1'
      compile 'com.google.android.gms:play-services-auth:10.0.1'
      compile 'com.google.firebase:firebase-storage:10.0.1'
      compile 'com.vistrav:ask:2.5'
      compile 'com.android.support:support-v4:25.3.1'
      compile 'com.android.support:support-vector-drawable:25.3.1'
      compile 'com.android.support:design:25.3.1'
      compile 'io.paperdb:paperdb:2.1'
      compile 'io.realm:realm-android:0.84.1'
      compile 'com.google.firebase:firebase-crash:10.0.1'
      testCompile 'junit:junit:4.12'
  }
  
  apply plugin: 'com.google.gms.google-services'
  repositories {
      mavenCentral()
  }
  </code></pre>
  
  <p>My project build.gradle:</p>
  
  <pre><code>buildscript {
      ext.kotlin_version = '1.1.3'
      repositories {
          jcenter()
      }
      dependencies {
          classpath 'com.android.tools.build:gradle:2.3.3'
  
  
          classpath 'com.google.gms:google-services:3.0.0'
          classpath 'io.realm:realm-gradle-plugin:3.5.0'
      }
  }
  
  allprojects {
      repositories {
          jcenter()
      }
  }
  
  task clean(type: Delete) {
      delete rootProject.buildDir
  }
  </code></pre>
  
  <p>I think that the library destroyed something, but I don't know how to fix it.</p>