MultiDex NoClassDefFound error

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Your AppWrapper class fails to load because the retrofit.ErrorHandler interface is not included in main dex file.

How do you calculate which classes to put in your main-dex-list file?
There’s a script that can generate it for you. I wrote a blogpost that shows how to use it.

Update (10/31/2014):
Gradle plugin v0.14.0 now does it automatically. See my answer here.

Update (24/04/2017):
The developer guide explains how to pick specific classes with a gradle option if it doesn’t pick all the right ones automatically.

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