Android Studio 3 0 Execution failed for task unable to merge dex

Question

android studio was getting build error while build execution with following       Error Execution failed for task   app transformDexArchiveWithExternalLibsDexMergerForDebug   java lang RuntimeException  java lang RuntimeException  com android builder dexing DexArchiveMergerException  Unable to merge dex    My app build gradle file   apply plugin   com android application   android       compileSdkVersion 26     buildToolsVersion  26 0 2      defaultConfig           applicationId  com pdroid foodieschoice          minSdkVersion 16         targetSdkVersion 25         versionCode 1         versionName  1 0          testInstrumentationRunner  android support test runner AndroidJUnitRunner            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 constraint constraint-layout 1 0 2      compile  com firebaseui firebase-ui-auth 2 3 0       testCompile  junit junit 4 12    configurations all       resolutionStrategy           force  com android support appcompat-v7 26 0 1          force  com android support support-compat 26 0 1          force  com android support support-core-ui 26 0 1          force  com android support support-annotations 26 0 1          force  com android support recyclerview-v7 26 0 1           apply plugin   com google gms google-services    any solutions  Edit  i have done with sample through firebase github site and solved

User · Answer

You can always revert to DX for now via this setting in your project's gradle.properties file:

android.enableD8=false

For more info, see https://android-developers.googleblog.com/2018/04/android-studio-switching-to-d8-dexer.html

User · Answer

Same thing happened to me  figured out that I was in the middle of updating to AS 3 0 1 and after I did the update  cleaned and rebuilt the app  everything was fixed

User · Answer

When the version of Android Studio is 3 0 1  Gradle Version is 4 1 and Android PluginVersion is 3 0 0  it will encounter this problem  Then I downgrade Gradle Version is 3 3  Android Android is zero  there is no such problem

User · Answer

I tried many solutions as mentioned above including the multiDexEnabled true but none of that worked for me   Here is the solution which worked for me - copy this code in app build gradle file  configurations all       resolutionStrategy eachDependency   DependencyResolveDetails details - gt          def requested   details requested         if  requested group     com android support   amp  amp  requested name     multidex                 details useVersion    rootProject ext supportLibVersion                       Make sure to run gradlew clean before running the code

User · Answer

Resolution   Refer to this link  As there are various options to shut the warning off depending on the minSdkVersion  it is set below 20    android        defaultConfig                         minSdkVersion 15           targetSdkVersion 26          multiDexEnabled true                     dependencies     compile  com android support multidex 1 0 3      If you have a minSdkVersion greater than 20 in your build gradle set use the following to shut down the warning     android         defaultConfig                           minSdkVersion 21            targetSdkVersion 26           multiDexEnabled true                       Update dependencies as follows         dependencies           implementation  com android support multidex 1 0 3           Again the only difference is the keywords in dependencies   minSdkVersion below 20  use compile  minSdkVersion above 20  use implementation   I hope this was helpful  please upvote if it solved your issue  Thank you for your time  Also for more info  on why this occurs  please read the first paragraph in the link  it will explain thoroughly why  and what does this warning mean

User · Answer

I also got the similar error      Problem          Solution      Main root cause for this issue ismultiDex is not enabled  So in the Project android app build gradle  enable the multiDex  For further information refer the documentation  https   developer android com studio build multidex mdex-gradle

User · Answer

This error happens when you add an external library which may not be compatible with your compileSdkVersion    Be careful when you are adding an external library   I spent 2 days on this problem and finally it got solved following these steps    Make sure all your support libraries are same as compileSdkVersion of your build gradle Module app  in my case it is 26   In your defaultConfig category type multiDexEnabled true  This is the important part   Go to File   Settings   Build  Execution  Deployment   Instant Run and try to Enable Disable Instant Run to hot swap    and click okay  Sync Your project  Lastly  Go to Build   click on Rebuild Project  Note  Rebuild Project first cleans and then builds the project

User · Answer

I had this when requested SDK version didn t match the dependencies  You can click the line highlighted and fix this clicking the red light bulb  No need to find the actual version  just let the IDE figure it out for you  And add google repo to maven config

User · Answer

Are you in between SDK or platform updates  If yes complete those completely and then try to continue   I normally update the individual packages that need to be updated as to taking the entire update which could go up to 2 5 GB sometimes  Doing this complete update sometimes fails  I had a number of SDK updates once I upgraded to Android Studio 3 0 and was getting the above error since all packages had not been updated  Once I updated all packages the above error was gone

User · Answer

1 Please add multiDexEnabled true 2 if you get compilation error then check your app level build gradle weather same dependencies are implemented with different versions  3 Remove one if you find same dependencies    android       compileSdkVersion 28     defaultConfig        minSdkVersion 17     targetSdkVersion 28     versionCode 1     versionName  1 0      testInstrumentationRunner  android support test runner AndroidJUnitRunner      multiDexEnabled true     hope it works fine    Happy Coding

User · Answer

The easiest way to avoid suck kind of error is   -Change library combilesdkversion as same as your app compilesdkversion  -Change library s supportLibrary version as same as your build gradle app

User · Answer

Try to add this in gradle      android         defaultConfig           multiDexEnabled true

User · Answer

In my case changing firebase library version from 2 6 0 to 2 4 2 fixed the issue

User · Answer

I Have Done and fixed this issue by just doing this jobs in my code   Open - build gradle Change value  from   compile  com google code gson gson 2 6 1    to  compile  com google code gson gson 2 8 2

User · Answer

Simply try doing a  Build -  Clean Project   That solved the problem for me

User · Answer

Use  multiDexEnabled true as below      minSdkVersion 17     targetSdkVersion 28     versionCode 1     versionName  1 0      testInstrumentationRunner  android support test runner AndroidJUnitRunner      multiDexEnabled true     and   implementation  com android support multidex 1 0 3    this Solution worked for me

User · Answer

For me  adding   multiDexEnabled true   and   packagingOptions           exclude  META-INF NOTICE           exclude  META-INF LICENSE          exclude  META-INF notice          exclude  META-INF notice txt          exclude  META-INF license          exclude  META-INF license txt          into the app level Build gradle file solved the issue

User · Answer

Go to your module level build gradle file and add the following lines to the code      defaultConfig                       minSdkVersion 15          targetSdkVersion 28         multiDexEnabled true                  dependencies     implementation  com android support multidex 1 0 3      That solved the problem easily  Check this documentation

User · Answer

To remove this Dex issue just implement one dependency  This issue occur when we are using multiple different service from the same server  Suppose we are using ads and Firestore in a project and both have a repository maven  so we need to call different data with on repository we need dex dependency to implement  The new update Dependency -   implementation  com android support multidex 1 0 3    I m sure it will resolve your issue permanent

User · Answer

For me what fixed this error was changing one line in my app s gradle dependencies   from this   compile  com google android gms play-services-gcm           force   true     To this   compile  com google android gms play-services-gcm 11 8 0         force   true

User · Answer

Same problem  I have enabled multidex       defaultConfig           applicationId  xxx xxx xxxx          minSdkVersion 24         targetSdkVersion 26         multiDexEnabled true  I have cleared cache  ran gradle clean  rebuild  make  tried to make sure no conflicts in imported libraries  Removed all transitive dependencies  and made all updates  Still      Error Execution failed for task   app transformDexArchiveWithExternalLibsDexMergerForDebug     java lang RuntimeException  com android builder dexing DexArchiveMergerException  Unable to merge dex    Turns out the build did not like  implementation  org slf4j slf4j-android 1 7 21

User · Answer

I was receiving the same error and in my case  the error was resolved when I fixed a build error which was associated with a different build variant than the one I was currently building    I was building the build variant I was looking at just fine with no errors  but attempting to debug caused a app transformDexArchiveWithExternalLibsDexMergerForDebug error  Once I switched to build the other build variant  I caught my error in the build process and fixed it  This seemed to resolve my app transformDexArchiveWithExternalLibsDexMergerForDebug issue for all build variants    Note that this error wasn t within the referenced external module but within a distinct source set of a build variant which referenced an external module  Hope that s helpful to someone who may be seeing the same case as me

User · Answer

For me  the problem was the use of Java 1 8 in a module  but not in the app module  I added this to the app build gradle and worked   android      compileOptions           sourceCompatibility JavaVersion VERSION 1 8         targetCompatibility JavaVersion VERSION 1 8

User · Answer

For Cordova based project  run cordova clean android before build again  as  mkimmet suggested

User · Answer

Also be sure your app is subclassing MultiDexApplication  import android support multidex MultiDexApplication  class App   MultiDexApplication     or if not subclassing Application class  add to AndroidManifest xml   lt application   android name  android support multidex MultiDexApplication

User · Answer

This is what works for me  clean prepare and run    cordova clean android  ionic cordova prepare andriod  ionic cordova run andriod    hope it helps

[android] Android Studio 3.0 Execution failed for task: unable to merge dex

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