Android Gradle failed Multiple dex files define okhttp

Question

I have the following dependencies:

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:25.3.1'
    compile 'com.squareup.retrofit2:retrofit:2.3.0'
    compile 'com.squareup.retrofit2:converter-moshi:2.3.0'
    compile('com.github.eoinsha:JavaPhoenixChannels:0.2') {
        exclude module: 'groovy-all'
    }
}

And the following dependency tree:

+--- com.android.support:appcompat-v7:25.3.1
|    +--- com.android.support:support-annotations:25.3.1
|    +--- com.android.support:support-v4:25.3.1
|    |    +--- com.android.support:support-compat:25.3.1
|    |    |    \--- com.android.support:support-annotations:25.3.1
|    |    +--- com.android.support:support-media-compat:25.3.1
|    |    |    +--- com.android.support:support-annotations:25.3.1
|    |    |    \--- com.android.support:support-compat:25.3.1 (*)
|    |    +--- com.android.support:support-core-utils:25.3.1
|    |    |    +--- com.android.support:support-annotations:25.3.1
|    |    |    \--- com.android.support:support-compat:25.3.1 (*)
|    |    +--- com.android.support:support-core-ui:25.3.1
|    |    |    +--- com.android.support:support-annotations:25.3.1
|    |    |    \--- com.android.support:support-compat:25.3.1 (*)
|    |    \--- com.android.support:support-fragment:25.3.1
|    |         +--- com.android.support:support-compat:25.3.1 (*)
|    |         +--- com.android.support:support-media-compat:25.3.1 (*)
|    |         +--- com.android.support:support-core-ui:25.3.1 (*)
|    |         \--- com.android.support:support-core-utils:25.3.1 (*)
|    +--- com.android.support:support-vector-drawable:25.3.1
|    |    +--- com.android.support:support-annotations:25.3.1
|    |    \--- com.android.support:support-compat:25.3.1 (*)
|    \--- com.android.support:animated-vector-drawable:25.3.1
|         \--- com.android.support:support-vector-drawable:25.3.1 (*)
+--- com.squareup.retrofit2:retrofit:2.3.0
|    \--- com.squareup.okhttp3:okhttp:3.8.0
|         \--- com.squareup.okio:okio:1.13.0
+--- com.squareup.retrofit2:converter-moshi:2.3.0
|    +--- com.squareup.retrofit2:retrofit:2.3.0 (*)
|    \--- com.squareup.moshi:moshi:1.4.0
|         \--- com.squareup.okio:okio:1.11.0 -> 1.13.0
\--- com.github.eoinsha:JavaPhoenixChannels:0.2
     +--- com.fasterxml.jackson.core:jackson-databind:2.8.3
     |    +--- com.fasterxml.jackson.core:jackson-annotations:2.8.0
     |    \--- com.fasterxml.jackson.core:jackson-core:2.8.3
     \--- com.squareup.okhttp3:okhttp-ws:3.4.1
          \--- com.squareup.okhttp3:okhttp:3.4.1 -> 3.8.0 (*)

I get this error while trying to build the project:

Error:Execution failed for task ':app:transformClassesWithDexForDebug'.
> com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.dex.DexException: Multiple dex files define Lokhttp3/internal/ws/WebSocketReader$FrameCallback;

This is supposedly caused by the presence of two different versions of the okhttp library on the classpath:

3.4.1 by com.squareup.okhttp3:okhttp-ws which is a dependency of JavaPhoenixChannels
3.8.0 by retrofit

Gradle should be able to automatically resolve this, so I wonder what's the probelm. I tried to fix it by excluding okhttp and okhttp-ws from their respective first class dependencies and compile them separately but that doesn't seem to help.

Some explanation on why such errors would pop up is also appreciated.

did you add defaultConfig { multiDexEnabled true } in build.gradle file in app module ? then clean the project and try to build again. — Rohit Padma, Jul 14 '17 at 21:01
@RohitPadma That seems irrelevant here. I'm not running into method limit issues. — Paghillect, Jul 14 '17 at 21:07
https://stackoverflow.com/questions/20989317/multiple-dex-files-define-landroid-support-v4-accessibilityservice-accessibility/21100040 — Nouman Ghaffar, Jul 14 '17 at 21:12
https://stackoverflow.com/questions/22851103/android-studio-gradle-error-multiple-dex-files-define — Nouman Ghaffar, Jul 14 '17 at 21:13
Starting from okhttp 3.5 okhttp-ws is part of okhttp itself... Take a source of this library and compile it by yourself... You may also try to exclude okhttp-ws, but there is a chance that the version in okhttp 3.8.0 has no compatible interface — Selvin, Jul 14 '17 at 21:23
@NoumanGhaffar Already seen those question but didn't solve my problem. — Paghillect, Jul 14 '17 at 21:25
@Selvin Thanks! solved the issue. You could consider writing this as an answer for future reference. — Paghillect, Jul 14 '17 at 21:35

score 1 · Accepted Answer · answered Jul 17 '17 at 00:39

As pointed out by @Selvin in the comments, the issue is caused by the fact that okhtt-ws has been moved inside the core project since version 3.5 and hence specifying both a newer version of the okhttp and an old version of okhttp-ws would result in two different copies of the okhttp-ws library ending up on the classpath. To gradle, these would be different libraries using the same package hierarchy and hence it won't exclude one automatically.

TL;DR the error is fixed by excluding the okhttp-ws dependency as it is already available in version 3.8 of the okhttp itself:

compile 'com.squareup.okhttp3:okhttp:3.8.0'
compile('com.github.eoinsha:JavaPhoenixChannels:0.2') {
    exclude module: 'okhttp-ws'
}

Android Gradle failed Multiple dex files define okhttp

1 Answers1