Too many method references; max is 65536.

Question

Hi,

After adding yet another fat Android plugin the build got broken:

 Error building Player: CommandInvokationFailure:
     Unable to convert classes into dex format...
 stderr[    
 trouble writing output: Too many method references: 68573; max is 65536.

I know about Dalvik limitations and have read related topics.

How can I solve the problem?

I need to build the game on continuous integration server, so manual exporting and editing Eclipse project does not suit me.

There are suggestions over the internet to modify ProGuard build step but I haven't succeeded with this optimization.

Probably I should strip large jars somehow, but I don't know how. The most fat are (with size in bytes):

 4599100  google-play-services.jar
  995624  android-support-v4.jar
  925432  everyplay.jar
  852733  FlurryAds.jar
  687508  vunglePub.jar
  552394  facebooksdk.jar
  504254  gamecirclesdk.jar
  246509  login-with-amazon-sdk.jar
  215040  AmazonInsights-android-sdk-2.1.26.jar
  147242  unity-ads.jar

Any concrete suggestions would be very much appreciated. Thanks!

Unity 4.6.5p1
Windows 8.1 Pro

Answer 1

Answer by BigToe · Nov 20, 2015 at 06:56 AM

This is really late, but if anyone else is looking this should help.

Google changed their native play-game-services plugin to use AAR files instead of one huge .jar. This reduces the method calls and should allow you to build.

https://github.com/playgameservices/play-games-plugin-for-unity

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Answer 2

Answer by nitaym · Mar 16, 2017 at 08:24 PM

This is quite an old topic, but this was a big problem for me that was solved using this project https://github.com/googlesamples/unity-jar-resolver#usage It's a tool to download only what you need from Google play services.

This worked well for me. I hope this helps someone else

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Answer 3

Answer by Mantiz-GS · Sep 18, 2017 at 10:47 PM

I had the same problem. Try this: If you have aar files exploded (using Play Services Resolver) you can change in each android manifest (is created a folder per plugin) the attribute "package" in tag "manifest" by you main package name (established in player settings), this worked for me. (Mike Flores)

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mpaxman · Oct 06, 2017 at 09:59 PM 0

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Thanks @Mantiz-GS ! Your suggestion to go through the manifests and unify the package name they are all using worked well for me. I guess for some plugins it doesn't matter what the package name in the manifest is set to?

$$anonymous$$ · Oct 11, 2017 at 04:30 PM 0

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will changing the package name cuz issues in the functions of the sdks ?what will the package name affect

alirezakhaan · Oct 18, 2017 at 05:59 AM 0

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i'm using heyzap sdk 13.4 with mediation UnityAds, Vungle, Admob,Facebook Audience ,inmobi plus using Facebook sdk V7.9 and unityPurchasing and Firebase Version 4.20 . thats worked for me thanks a lot

mtlyy · Dec 12, 2018 at 11:15 AM 0

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Thank you very much @Mantiz-GS,I solved the big problem in your way

Answer 4

Answer by $$anonymous$$ · Nov 09, 2017 at 11:25 AM

Since in my project I'm using a lot of SDK the solution was to use Gradle on build , a new option unity added in 5.5+ .Gradle job is to reduce the DEX limit and also by this i can enable multi-dexing which also reduces the dex limit , the drawback here is Gradle is quite picky and when it reaches a duplicate files or anything alike it throws an error but everything is fixable.

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Too many method references; max is 65536.

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