Duplicate files copied in APK error when integrating with existing Android project

I’m trying to add React Native to an existing Android project using Gradle. I followed the instructions here: https://facebook.github.io/react-native/docs/integration-with-existing-apps.html

When I try to run my app from Android Studio I get this error:

> com.android.build.api.transform.TransformException: com.android.builder.packaging.DuplicateFileException: Duplicate files copied in APK lib/armeabi-v7a/libgnustl_shared.so
    File1: .../build/intermediates/exploded-aar/com.facebook.react/react-native/0.20.1/jni
    File2: .../build/intermediates/exploded-aar/com.spotify/spotify-player/1.0.0-beta12/jni

It looks like both React Native and the Spotify dependencies require the same file: libgnustl_shared.so.

There is a Stack Overflow post with a hacky fix for this, but I’m guessing there should be a more elegant solution than this: http://stackoverflow.com/a/37201791/62

It would be nice to document the solution for this in the React Native page I linked above, as this could happen to many people when first trying to integrate React Native.

I’m on Mac OS X 10.11.6.

[lyahdav]

I was able to resolve this and documented my solution here: http://stackoverflow.com/a/39584838/62

It would be nice if React Native could solve this though.

[EflakeEver]

Finally i found the mistake cause by the step of re-zip, I should re-zip all files instead of outer folder, it was success now, thanks for you help @lyahdav