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I updated Android studio to 3.2.1 and run 'flutter build apk' in terminal of Mac, it shows below error. I was able to build apk successfully before updated Android studio.

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease'.
> Job failed, see logs for details

here with my proguard-rules.pro

#Flutter Wrapper
-keep class io.flutter.app.** { *; }
-keep class io.flutter.plugin.**  { *; }
-keep class io.flutter.util.**  { *; }
-keep class io.flutter.view.**  { *; }
-keep class io.flutter.**  { *; }
-keep class io.flutter.plugins.**  { *; }
-keep class com.google.firebase.** { *; }
Cœur
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GPH
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2 Answers2

1

This fixed my issue,

 #Flutter Wrapper
-keep class io.flutter.app.** { *; }
-keep class io.flutter.plugin.**  { *; }
-keep class io.flutter.util.**  { *; }
-keep class io.flutter.view.**  { *; }
-keep class io.flutter.**  { *; }
-keep class io.flutter.plugins.**  { *; }
-dontwarn android.**

Check explanation here: https://github.com/flutter/flutter/issues/40218#issuecomment-531047713

Pekama
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0

Goto android/app/build.gradle and try minifyEnabled false it should work

Denis John
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