Android Build Error : Unable to convert classes into dex format. ( Too many field references )

CommandInvokationFailure: Unable to convert classes into dex format.
/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/bin/java -Xmx2048M -Dcom.android.sdkmanager.toolsdir="/Users/calvinchan/Library/Android/sdk/tools" -Dfile.encoding=UTF8 -jar "/Applications/Unity/PlaybackEngines/AndroidPlayer/Tools/sdktools.jar" -

stderr[

trouble writing output: Too many field references: 79518; max is 65536.
You may try using --multi-dex option.
References by package:
2 android.accounts
30 android.app
5 android.content
47 android.content.pm
7 android.content.res
3 android.database
51 android.graphics
6 android.hardware
10 android.media
1 android.media.browse
4 android.net
3 android.opengl
38 android.os
3 android.print
3 android.provider
2104 android.support.customtabs
2193 android.support.graphics.drawable
2040 android.support.graphics.drawable.animated
2040 android.support.v4
13 android.support.v4.accessibilityservice
17 android.support.v4.animation
770 android.support.v4.app
110 android.support.v4.content
1 android.support.v4.content.pm
9 android.support.v4.graphics
42 android.support.v4.graphics.drawable
4 android.support.v4.hardware.display
12 android.support.v4.hardware.fingerprint
9 android.support.v4.internal.view
337 android.support.v4.media
272 android.support.v4.media.session
5 android.support.v4.net
19 android.support.v4.os
49 android.support.v4.print
9 android.support.v4.provider
5 android.support.v4.speech.tts
55 android.support.v4.text
74 android.support.v4.util
385 android.support.v4.view
112 android.support.v4.view.accessibility
8 android.support.v4.view.animation
495 android.support.v4.widget
378 android.support.v7.app
2040 android.support.v7.appcompat
2040 android.support.v7.cardview
18 android.support.v7.graphics.drawable
1 android.support.v7.text
2 android.support.v7.transition
77 android.support.v7.view
191 android.support.v7.view.menu
835 android.support.v7.widget
5 android.text
17 android.util
15 android.view
3 android.webkit
23 android.widget
2 bitter.jnibridge
158 bolts
2 com.ablar.common.json
223 com.adjust.sdk
1 com.amazon.android.framework.task.pipeline
2 com.amazon.android.framework.util
4 com.amazon.device.iap
12 com.amazon.device.iap.internal
6 com.amazon.device.iap.internal.a
32 com.amazon.device.iap.internal.b
2 com.amazon.device.iap.internal.b.a
6 com.amazon.device.iap.internal.b.b
5 com.amazon.device.iap.internal.b.c
4 com.amazon.device.iap.internal.b.d
4 com.amazon.device.iap.internal.b.e
4 com.amazon.device.iap.internal.b.g
16 com.amazon.device.iap.internal.c
32 com.amazon.device.iap.internal.model
17 com.amazon.device.iap.internal.util
93 com.amazon.device.iap.model
7 com.android.vending.billing
307 com.digits.sdk.android
9 com.digits.sdk.android.concurrent
136 com.digits.sdk.vcard
2074 com.everyplay.Everyplay
19 com.everyplay.Everyplay.a
16 com.everyplay.Everyplay.b
155 com.everyplay.Everyplay.c
67 com.everyplay.Everyplay.c.a
117 com.everyplay.Everyplay.communication
13 com.everyplay.Everyplay.communication.a
19 com.everyplay.Everyplay.communication.b
26 com.everyplay.Everyplay.communication.c
1 com.everyplay.Everyplay.communication.d
15 com.everyplay.Everyplay.communication.socialnetworks
40 com.everyplay.Everyplay.communication.upload
27 com.everyplay.Everyplay.d
29 com.everyplay.Everyplay.e
85 com.everyplay.Everyplay.encoding
30 com.everyplay.Everyplay.f
4 com.everyplay.Everyplay.unity
252 com.everyplay.Everyplay.view
12 com.everyplay.Everyplay.view.a
24 com.everyplay.Everyplay.view.auth
38 com.everyplay.Everyplay.view.browser
153 com.everyplay.Everyplay.view.videoplayer
284 com.everyplay.Everyplay.view.videoplayer.a
55 com.everyplay.external.aspectj.internal.lang.reflect
13 com.everyplay.external.aspectj.lang
19 com.everyplay.external.aspectj.lang.reflect
1 com.everyplay.external.aspectj.runtime
5 com.everyplay.external.aspectj.runtime.internal
5 com.everyplay.external.aspectj.runtime.internal.cflowstack
46 com.everyplay.external.aspectj.runtime.reflect
16 com.everyplay.external.iso
476 com.everyplay.external.iso.boxes
48 com.everyplay.external.iso.boxes.apple
6 com.everyplay.external.iso.boxes.dece
142 com.everyplay.external.iso.boxes.fragment
8 com.everyplay.external.iso.boxes.mdat
105 com.everyplay.external.iso.boxes.sampleentry
25 com.everyplay.external.iso.boxes.threegpp26244
24 com.everyplay.external.iso.boxes.vodafone
39 com.everyplay.external.iso14496.part12
178 com.everyplay.external.iso14496.part15
53 com.everyplay.external.iso23001.part7
22 com.everyplay.external.iso23009.part1
50 com.everyplay.external.mp4parser
40 com.everyplay.external.mp4parser.authoring
25 com.everyplay.external.mp4parser.authoring.builder
25 com.everyplay.external.mp4parser.authoring.samples
138 com.everyplay.external.mp4parser.authoring.tracks
128 com.everyplay.external.mp4parser.boxes
3 com.everyplay.external.mp4parser.boxes.adobe
175 com.everyplay.external.mp4parser.boxes.apple
10 com.everyplay.external.mp4parser.boxes.basemediaformat
15 com.everyplay.external.mp4parser.boxes.cenc
46 com.everyplay.external.mp4parser.boxes.dece
15 com.everyplay.external.mp4parser.boxes.mp4
109 com.everyplay.external.mp4parser.boxes.mp4.objectdescriptors
40 com.everyplay.external.mp4parser.boxes.mp4.samplegrouping
32 com.everyplay.external.mp4parser.boxes.piff
26 com.everyplay.external.mp4parser.boxes.threegpp26244
6 com.everyplay.external.mp4parser.boxes.threegpp26245
9 com.everyplay.external.mp4parser.contentprotection
2 com.everyplay.external.mp4parser.h264
122 com.everyplay.external.mp4parser.h264.model
7 com.everyplay.external.mp4parser.h264.read
36 com.everyplay.external.mp4parser.util
2441 com.facebook
2040 com.facebook.android
169 com.facebook.appevents
39 com.facebook.appevents.internal
46 com.facebook.applinks
9 com.facebook.devicerequests.internal
563 com.facebook.internal
183 com.facebook.login
81 com.facebook.login.widget
32 com.facebook.messenger
51 com.facebook.share
360 com.facebook.share.internal
113 com.facebook.share.model
124 com.facebook.share.widget
53 com.facebook.unity
107 com.gameanalytics.sdk
6 com.gameanalytics.sdk.android
13 com.gameanalytics.sdk.device
22 com.gameanalytics.sdk.events
22 com.gameanalytics.sdk.http
11 com.gameanalytics.sdk.logging
33 com.gameanalytics.sdk.state
7 com.gameanalytics.sdk.store
13 com.gameanalytics.sdk.threading
1 com.gameanalytics.sdk.utilities
46 com.google.android.gcm
2034 com.google.android.gms
20 com.google.android.gms.actions
13 com.google.android.gms.ads.identifier
2090 com.google.android.gms.auth
36 com.google.android.gms.auth.api.signin
6 com.google.android.gms.auth.api.signin.internal
2034 com.google.android.gms.base
37 com.google.android.gms.clearcut
96 com.google.android.gms.common
101 com.google.android.gms.common.api
42 com.google.android.gms.common.data
46 com.google.android.gms.common.images
185 com.google.android.gms.common.internal
1 com.google.android.gms.common.internal.safeparcel
4 com.google.android.gms.common.server
12 com.google.android.gms.common.server.converter
33 com.google.android.gms.common.server.response
63 com.google.android.gms.common.stats
22 com.google.android.gms.common.util
2160 com.google.android.gms.drive
60 com.google.android.gms.drive.events
13 com.google.android.gms.drive.events.internal
373 com.google.android.gms.drive.internal
11 com.google.android.gms.drive.metadata
24 com.google.android.gms.drive.metadata.internal
41 com.google.android.gms.drive.query
61 com.google.android.gms.drive.query.internal
39 com.google.android.gms.drive.realtime.internal
69 com.google.android.gms.drive.realtime.internal.event
7 com.google.android.gms.drive.widget
27 com.google.android.gms.dynamic
2 com.google.android.gms.dynamite.descriptors.com.google.android.gms.flags
16 com.google.android.gms.flags.impl
2229 com.google.android.gms.games
26 com.google.android.gms.games.achievement
78 com.google.android.gms.games.appcontent
15 com.google.android.gms.games.event
263 com.google.android.gms.games.internal
252 com.google.android.gms.games.internal.api
1 com.google.android.gms.games.internal.constants
3 com.google.android.gms.games.internal.data
7 com.google.android.gms.games.internal.events
17 com.google.android.gms.games.internal.experience
9 com.google.android.gms.games.internal.game
3 com.google.android.gms.games.internal.multiplayer
1 com.google.android.gms.games.internal.notification
59 com.google.android.gms.games.internal.player
8 com.google.android.gms.games.internal.request
61 com.google.android.gms.games.leaderboard
64 com.google.android.gms.games.multiplayer
41 com.google.android.gms.games.multiplayer.realtime
50 com.google.android.gms.games.multiplayer.turnbased
58 com.google.android.gms.games.quest
36 com.google.android.gms.games.request
50 com.google.android.gms.games.snapshot
9 com.google.android.gms.games.social
16 com.google.android.gms.games.stats
50 com.google.android.gms.games.video
2135 com.google.android.gms.gcm
2081 com.google.android.gms.iid
1623 com.google.android.gms.internal
2041 com.google.android.gms.nearby
6 com.google.android.gms.nearby.bootstrap
46 com.google.android.gms.nearby.bootstrap.request
31 com.google.android.gms.nearby.connection
132 com.google.android.gms.nearby.internal.connection
74 com.google.android.gms.nearby.messages
26 com.google.android.gms.nearby.messages.devices
141 com.google.android.gms.nearby.messages.internal
18 com.google.android.gms.phenotype
32 com.google.android.gms.playlog.internal
6 com.google.android.gms.security
26 com.google.android.gms.signin.internal
2082 com.google.android.gms.tasks
2118 com.google.android.youtube.player
80 com.google.android.youtube.player.internal
6 com.google.appengine.api.urlfetch
2034 com.google.example.games.mainlibproj
2062 com.google.firebase
13 com.google.firebase.auth
35 com.google.games.bridge
68 com.google.gson
83 com.google.gson.internal
115 com.google.gson.internal.bind
3 com.google.gson.reflect
72 com.google.gson.stream
2034 com.jungleegames.eatme.io
10 com.onevcat.unirate
40 com.prime31
2034 com.prime31.IAB
13 com.prime31.InAppBilling
112 com.prime31.util
291 com.squareup.picasso
708 com.tapjoy
6 com.tapjoy.advertising
6 com.tapjoy.android
2 com.tapjoy.common.android
6 com.tapjoy.core
16 com.tapjoy.http
2078 com.tapjoy.internal
5 com.tapjoy.internal.gms
8 com.tapjoy.mediation
6 com.tapjoy.mraid
84 com.tapjoy.mraid.controller
19 com.tapjoy.mraid.listener
29 com.tapjoy.mraid.util
90 com.tapjoy.mraid.view
6 com.tapjoy.nativeapi
11 com.tapjoy.sdk
14 com.threatmetrix.TrustDefenderMobile
14 com.twitter.sdk.android
2137 com.twitter.sdk.android.core
72 com.twitter.sdk.android.core.identity
27 com.twitter.sdk.android.core.internal
56 com.twitter.sdk.android.core.internal.oauth
83 com.twitter.sdk.android.core.internal.scribe
210 com.twitter.sdk.android.core.models
8 com.twitter.sdk.android.core.services.params
18 com.twitter.sdk.android.tweetcomposer
196 com.twitter.sdk.android.tweetui
38 com.twitter.sdk.android.tweetui.internal.util
2080 com.unity3d.ads.android
7 com.unity3d.ads.android.cache
6 com.unity3d.ads.android.campaign
7 com.unity3d.ads.android.data
8 com.unity3d.ads.android.item
163 com.unity3d.ads.android.properties
19 com.unity3d.ads.android.unity3d
44 com.unity3d.ads.android.video
25 com.unity3d.ads.android.view
74 com.unity3d.ads.android.webapp
10 com.unity3d.ads.android.zone
190 com.unity3d.player
2 com.voxelbusters
2034 com.voxelbusters.androidnativeplugin
1 com.voxelbusters.nativeplugins
323 com.voxelbusters.nativeplugins.defines
22 com.voxelbusters.nativeplugins.features.notification
25 com.voxelbusters.nativeplugins.features.notification.core
5 com.voxelbusters.nativeplugins.features.notification.serviceprovider.gcm
4 com.voxelbusters.nativeplugins.features.notification.shortcutbadger
52 com.voxelbusters.nativeplugins.features.notification.shortcutbadger.impl
28 com.voxelbusters.nativeplugins.features.ui
5 com.voxelbusters.nativeplugins.features.utility
8 com.voxelbusters.nativeplugins.utilities
2034 com.voxelbusters.utility
71 io.fabric.sdk.android
2 io.fabric.sdk.android.services.cache
174 io.fabric.sdk.android.services.common
58 io.fabric.sdk.android.services.concurrency
35 io.fabric.sdk.android.services.events
98 io.fabric.sdk.android.services.network
9 io.fabric.sdk.android.services.persistence
181 io.fabric.sdk.android.services.settings
2 java.io
16 java.lang
11 java.lang.annotation
6 java.net
2 java.nio
1 java.nio.channels
6 java.util
4 java.util.concurrent
6 java.util.logging
20 org.fmod
1 org.json
170 retrofit
3 retrofit.android
1 retrofit.appengine
22 retrofit.client
4 retrofit.converter
18 retrofit.mime
]
stdout[
processing archive /Users/calvinchan/Documents/Junglee Games/eatme/eat-me-client/EatMe/Temp/StagingArea/android-libraries/IAB_lib/libs/./IABPlugin.jar...
ignored resource META-INF/
ignored resource META-INF/MANIFEST.MF
ignored resource com/
ignored resource com/android/
ignored resource com/android/vending/
ignored resource com/android/vending/billing/
ignored resource com/android/vending/billing/IInAppBillingService.aidl
processing com/android/vending/billing/IInAppBillingService.class...
processing com/android/vending/billing/IInAppBillingService$Stub.class...
processing com/android/vending/billing/IInAppBillingService$Stub$Proxy.class...
ignored resource com/prime31/
processing com/prime31/GoogleIABPlugin.class...
processing com/prime31/GoogleIABPlugin$1.class...
processing com/prime31/GoogleIABPlugin$2.class...
processing com/prime31/GoogleIABPlugin$3.class...
processing com/prime31/GoogleIABPlugin$4.class...
processing com/prime31/GoogleIABPlugin$5.class...
processing com/prime31/GoogleIABPluginBase.class...
processing com/prime31/GoogleIABPluginBase$1.class...
processing com/prime31/GoogleIABProxyActivity.class...
processing com/prime31/IABConstants.class...
ignored resource com/prime31/InAppBilling/
processing com/prime31/InAppBilling/BuildConfig.class...
processing com/prime31/InAppBilling/R.class...
processing com/prime31/InAppBilling/R$attr.class...
processing com/prime31/InAppBilling/R$drawable.class...
processing com/prime31/InAppBilling/R$id.class...
processing com/prime31/InAppBilling/R$layout.class...
processing com/prime31/InAppBilling/R$menu.class...
processing com/prime31/InAppBilling/R$string.class...
processing com/prime31/InAppBilling/R$style.class...
ignored resource com/prime31/util/
processing com/prime31/util/Base64.class...
processing com/prime31/util/Base64DecoderException.class...
processing com/prime31/util/IabException.class...
processing com/prime31/util/IabHelper.class...
processing com/prime31/util/IabHelper$1.class...
processing com/prime31/util/IabHelper$2.class...
processing com/prime31/util/IabHelper$2$1.class...
processing com/prime31/util/IabHelper$3.class...
processing com/prime31/util/IabHelper$3$1.class...
processing com/prime31/util/IabHelper$3$2.class...
processing com/prime31/util/IabHelper$OnConsumeFinishedListener.class...
processing com/prime31/util/IabHelper$OnConsumeMultiFinishedListener.class<message truncated>

 

The root cause for your issue is this (from the log):

You can read more about this issue type here: https://developer.android.com/studio/build/multidex.html

In short - you're limited by the number of methods / fields that you can include into your .apk.
If you include too many native Android libraries, you'll exceed that limit and the build fails.

The error log you posted shows the method count per package name. You can use that to see exactly which package takes a high number from the max count you can have (which is 65536).

To solve this issue you can try to reduce the number of plugins you use on Android (for example - Google play services now come as a set of separate .AAR files. You can use only those that are actually needed).

This can be tricky sometimes, but is the simplest way of fixing this issue. Other options are more "involved" than this.

NOTE: you can use this service to fix exactly this sort of errors.