Android gradle build failing after migrating to v28.0.0 support libraries

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After upgrading to the v28.0.0 Android support libraries (from 27.1.1), my build is failing with the following exception:

org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease'

caused by:

Warning: androidx.media.AudioAttributesCompatParcelizer: can't find referenced field 'android.support.v4.media.AudioAttributesImpl mImpl' in program class android.support.v4.media.AudioAttributesCompat
Warning: androidx.media.AudioAttributesImplApi21Parcelizer: can't find referenced field 'android.media.AudioAttributes mAudioAttributes' in program class android.support.v4.media.AudioAttributesImplApi21
Warning: androidx.media.AudioAttributesImplApi21Parcelizer: can't find referenced field 'int mLegacyStreamType' in program class android.support.v4.media.AudioAttributesImplApi21
Warning: androidx.media.AudioAttributesImplBaseParcelizer: can't find referenced field 'int mUsage' in program class android.support.v4.media.AudioAttributesImplBase
Warning: androidx.media.AudioAttributesImplBaseParcelizer: can't find referenced field 'int mContentType' in program class android.support.v4.media.AudioAttributesImplBase
Warning: androidx.media.AudioAttributesImplBaseParcelizer: can't find referenced field 'int mFlags' in program class android.support.v4.media.AudioAttributesImplBase
Warning: androidx.media.AudioAttributesImplBaseParcelizer: can't find referenced field 'int mLegacyStream' in program class android.support.v4.media.AudioAttributesImplBase

I've tried adding

-keep class android.support.v4.media.** { *; }

to my Gradle config but the error persists.

Can anyone offer any assistance?

Thanks,

Josh

android java
1 Answers

I don't know if it's the best solution, but after adding these lines to my proguard-rules.pro file, it solve the problem :

-dontwarn androidx.**
-keep class androidx.** { *; }
-keep interface androidx.** { *; }
user_9685380
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