mutlidex: duplicate class okhttp3/Address.class even when all other inclusions of okhttp have been excluded

I’ve got an app which uses okhttp in this combination

def okhttp_version = '3.0.0'

compile  "com.squareup.okhttp3:okhttp:$okhttp_version"
compile  "com.squareup.okhttp3:okhttp-urlconnection:$okhttp_version"
compile  "com.squareup.picasso:picasso:2.5.2"
compile  "com.jakewharton.picasso:picasso2-okhttp3-downloader:1.0.1"

When building the multidex artifact i get

java.util.zip.ZipException: duplicate entry: okhttp3/Address.class

So i thought: well maybe i just have to exclude the transitive dependencies on okhttp and did:

compile  "com.squareup.okhttp3:okhttp:$okhttp_version"
compile  ("com.squareup.okhttp3:okhttp-urlconnection:$okhttp_version") {
   exclude group: "com.squareup.okhttp3"
}
compile  "com.squareup.picasso:picasso:2.5.2"
compile  ("com.jakewharton.picasso:picasso2-okhttp3-downloader:1.0.1") {
    exclude group: "com.squareup.okhttp3"
}

But i’m still getting that error… However moving back to okhttp version 3.0.0-RC1 so it looks liek this:

def okhttp_version = '3.0.0-RC1'

compile  "com.squareup.okhttp3:okhttp:$okhttp_version"
compile  "com.squareup.okhttp3:okhttp-urlconnection:$okhttp_version"
compile  "com.squareup.picasso:picasso:2.5.2"
compile  "com.jakewharton.picasso:picasso2-okhttp3-downloader:1.0.1"

And everything will compile & run fine

[JakeWharton]

It wasn’t because of transitive dependencies, it was a mispackaged dependency. Also remove okhttp-urlconnection dependency, it isn’t needed.

On Sun, Jan 17, 2016, 9:42 AM Marty Glaubitz [e-mail] wrote:

alright, i’ll give it a run tomorow. Still, where could the duplicate Address.class come from? I mean, i’ve essentially excluded the entire package from the transient dependencies…

— Reply to this email directly or view it on GitHub https://github.com/JakeWharton/picasso2-okhttp3-downloader/issues/1#issuecomment-172330164 .

[boatImpish]

It happened to me, and I just to make sure all the version of the same dependency in the whole project is the same. If you use jar, please delete it and add it in the dependency in the build.gradle file. for me, it worked fine. and I get the release apk. I think the reason why this happened is because the project has duplicated file. To solve this we need to make sure the dependency is unique.