开启混淆后Flutter应用找不到org.pytorch.PyTorchAndroid类崩溃求助

我在开发Flutter应用时使用了pytorch_mobile插件，当把minifyEnabled和shrinkResources设置为true后，应用启动时出现以下崩溃报错：

F/xxx(25186): java_vm_ext.cc:594] JNI DETECTED ERROR IN APPLICATION: JNI NewGlobalRef called with pending exception java.lang.ClassNotFoundException: Didn't find class "org.pytorch.PyTorchAndroid" on path: DexPathList[[zip file "/data/app/~~hrC1Awe0qTN_lMvYeHVsZQ==/xxx-iLzf33Fatdto0s-3rgbmzA==/base.apk"],nativeLibraryDirectories=[/data/app/~~hrC1Awe0qTN_lMvYeHVsZQ==/xxx-iLzf33Fatdto0s-3rgbmzA==/lib/arm64, /data/app/~~hrC1Awe0qTN_lMvYeHVsZQ==/xxx-iLzf33Fatdto0s-3rgbmzA==/base.apk!/lib/arm64-v8a, /system/lib64, /system/system_ext/lib64]]

为了在正式发布前调试解决这个问题，我在android/app/build.gradle的android.buildTypes中给debug模式也配置了混淆：

...
debug {
    minifyEnabled true
    shrinkResources true
    proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
...

我在proguard-rules.pro中尝试了多种规则，包括保留PyTorch相关类、接口，保留插件包内容等，具体规则如下：

-optimizationpasses 1
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-dontskipnonpubliclibraryclassmembers
-dontpreverify
-verbose
-dump class_files.txt
-printseeds seeds.txt
-printusage unused.txt
-printmapping mapping.txt
-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*

-allowaccessmodification
-keepattributes *Annotation*
-renamesourcefileattribute SourceFile
-keepattributes SourceFile,LineNumberTable
-repackageclasses ''

-keep class org.pytorch.** { *; }
-keep interface org.pytorch.** { *; }
-keep class io.fynn.pytorch_mobile.** { *; }
-keep interface io.fynn.pytorch_mobile.** { *; }
-keep class io.fynn.** { *; }
-keep interface io.fynn.** { *; }
-keep class libpytorch.** { *; }
-keep interface libpytorch.** { *; }
-keep class libpytorch*.** { *; }
-keep interface libpytorch*.** { *; }

-keep class org.pytorch.proguard.UsedBy*
-keep @org.pytorch.proguard.UsedBy* class * {
  <init>();
}
-keepclassmembers class * {
  @org.pytorch.proguard.UsedBy* *;
}

-keep class org.pytorch.*
-keep @org.pytorch.* class * { *; }
-keepclassmembers class * {
  @org.pytorch.* *;
}

-keep class * {
    *;
}

-keep class org.pytorch.** { *; }
-keep class com.facebook.jni.** { *; }
-keep interface org.pytorch.** { *; }
-keep interface com.facebook.jni.** { *; }
-keep class org.pytorch.PyTorchAndroid** { *; }
-keep interface org.pytorch.PyTorchAndroid** { *; }
-keep class org.pytorch.PyTorchAndroid.** { *; }
-keep interface org.pytorch.PyTorchAndroid.** { *; }
-keep class org.pytorch.pytorchandroid** { *; }
-keep interface org.pytorch.pytorchandroid** { *; }
-keep class org.pytorch.pytorchandroid.** { *; }
-keep interface org.pytorch.pytorchandroid.** { *; }
-keep class org.pytorch.jni.** { *; }
-keep interface org.pytorch.jni.** { *; }
-keep class org.pytorch.**
-keep class org.pytorch.*

#-keep class org.pytorch.PyTorchAndroid

#@keep class org.pytorch.** { *; }
#@keep class com.facebook.jni.** { *; }
#@keep interface org.pytorch.** { *; }
#@keep interface com.facebook.jni.** { *; }
#@keep class org.pytorch.PyTorchAndroid** { *; }
#@keep interface org.pytorch.PyTorchAndroid** { *; }
#@keep class org.pytorch.PyTorchAndroid.** { *; }
#@keep interface org.pytorch.PyTorchAndroid.** { *; }
#@keep class org.pytorch.pytorchandroid** { *; }
#@keep interface org.pytorch.pytorchandroid** { *; }
#@keep class org.pytorch.pytorchandroid.** { *; }
#@keep interface org.pytorch.pytorchandroid.** { *; }
#@keep class org.pytorch.jni.** { *; }
#@keep interface org.pytorch.jni.** { *; }
#@keep class org.pytorch.**
#@keep class org.pytorch.*
#@keep class org.pytorch.PyTorchAndroid

-keeppackagenames *pytorch*,*PyTorch*,**pytorch**,**PyTorch**

-libraryjars pytorch_android-1.8.0.aar

但应用依然会出现上述报错并崩溃，目前该插件的相关讨论中还没有可行的优化方案，求解决办法。

内容的提问来源于stack exchange，提问作者luvzfootball