[Solved] Adding in-app unity service to a game already including admob causes error

a-tauzzi · December 21, 2015, 8:32am

I have a game already serving interstitial ads using Google mobile ads plugin. Then, I decided to include Unity in-app purchase service (available in Unity 5.3) but I get an error during the build phase (see below). If I delete the Google Mobile Ads everything start to work.

CommandInvokationFailure: Unable to convert classes into dex format. See the Console for details.
/Library/Java/JavaVirtualMachines/jdk1.7.0_67.jdk/Contents/Home/bin/java -Xmx2048M -Dcom.android.sdkmanager.toolsdir=“/Applications/android-sdk/tools” -Dfile.encoding=UTF8 -jar “/Applications/Unity/PlaybackEngines/AndroidPlayer/Tools/sdktools.jar” -

stderr[
Uncaught translation error: java.lang.IllegalArgumentException: already added: Lcom/android/vending/billing/IInAppBillingService$Stub$Proxy;
Uncaught translation error: java.lang.IllegalArgumentException: already added: Lcom/android/vending/billing/IInAppBillingService$Stub;
Uncaught translation error: java.lang.IllegalArgumentException: already added: Lcom/android/vending/billing/IInAppBillingService;
3 errors; aborting
]
stdout[
processing archive bin/classes.jar…
processing com/unity3d/player/a$1.class…
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processing archive plugins/./android-support-v4.jar…
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nicholasr · December 22, 2015, 1:28am

@a-dibacco The plugin looks like it includes a problematic file, a purchasing (a.k.a. billing) JAR which itself contains Java classes from the package “com/android/vending/billing/IInAppBillingService”. These same Java classes are included by Unity IAP to support in-app purchasing. This duplication confuses the Android build, and so to successfully build the Java classes must be made unique.

I do not have the Google Mobile Ads package (is there a link? I found a repo that might be the source) but I can suggest an untested workaround experiment: (NOTE: Back up your code first!) Try finding the billing JAR in the Google Mobile Ads Plugin folder of your project, and moving the JAR completely out of Assets. I guess the JAR filename could be “in-app-billing-service-aidl.jar” or possibly “billingaidl.jar”. Then rebuild for Android.

a-tauzzi · December 22, 2015, 11:27pm

I deleted in-app-billing-service-aidl.jar under Assets/Plugins/Android/GoogleMobileAdsPlugin/libs and now I’m able to build an APK without problems.

Thank you very much,
Antonio.

beppim · December 30, 2015, 10:53am

@a-dibacco Does this workaround break AdMob or does it still work?

a-tauzzi · February 16, 2016, 10:21pm

AdMob still works fine