[Android] Abstract classes can't be instantiated when using full R8 mode after AGP 8.0 upgrade

[David Trpchevski]

Hello everyone,

I am working on a project that supports VAST ADs on the Video Player via Google IMA. Recently we’ve upgraded to AGP 8.0 which enforces full R8 mode (android.enableR8.fullMode flag is set to true by default). When building a release version of the app with obfuscation, the following errors pop up:

  com.google.ads.interactivemedia.v3.internal.zzse: Abstract classes can't be instantiated! Register an InstanceCreator or a TypeAdapter for this type. Class name: com.google.ads.interactivemedia.v3.impl.data.JavaScriptMsgDataWebViewCompat

Full error log is in the attachments. 

If I keep classes and interfaces from R8 and add this to proguard-rules it works fine:

-keep interface com.google.ads.interactivemedia.v3.** { *; }
-keep class com.google.ads.interactivemedia.v3.** { *; }

[IMA SDK]

Hi David,

Thank you for raising your concern to the IMA SDK forum.

For us to have a better understanding of your issue, kindly provide the following information below:

1. Is the issue reproducible using our sample app? [https://developers.google.com/interactive-media-ads/docs/sdks/android/client-side/download] Please specify
2. Kindly provide a sample project implementation where the issue is reproducible
3. Steps to reproduce the issue
4. Screen recording of issue

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Looking forward to your response.

Regards,

IMA SDK Team

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[David Trpchevski]

This can be closed. In the sample app, the same proguard rules are applied so I guess this is intended. 

[IMA SDK]

Hi David,

Let us know if you still have any IMA SDK concerns for us to address. We're happy to assist.

Regards,