将 Gradle 从 7.4.2 升级到 Gradle 8.0.0 时发布应用程序时出现错误 - java.lang.ClassCastException

很可能您正在使用与 Gradle 8.0 不兼容的插件。如果没有必要升级到 Gradle 8.0，我建议您降级回 7.4.2，直到这些插件变得兼容。另一种方法是检查不兼容的插件，并在可以添加时尝试替换它们。

由于 Parcelize 插件，我遇到了这个问题。我正在使用 Parcelize 插件在活动之间传递自定义对象 ArrayList。

经过多次尝试，终于找到了更改 proguard-rules.pro 文件的解决方案。

这是我 proguard-rules.pro 文件的内容

# Add project specific ProGuard rules here.
# You can control the set of applied configuration files using the
# proguardFiles setting in build.gradle.
#
# For more details, see
#   http://developer.android.com/guide/developing/tools/proguard.html

# If your project uses WebView with JS, uncomment the following
# and specify the fully qualified class name to the JavaScript interface
# class:
#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
#   public *;
#}

# Uncomment this to preserve the line number information for
# debugging stack traces.
#-keepattributes SourceFile,LineNumberTable

# If you keep the line number information, uncomment this to
# hide the original source file name.
#-renamesourcefileattribute SourceFile

-dontwarn rx.**

-dontwarn okio.**

-dontwarn com.squareup.okhttp.**
-keep class com.squareup.okhttp.** { *; }
-keep interface com.squareup.okhttp.** { *; }

-dontwarn retrofit.**
-keep class retrofit.** { *; }
-keepclasseswithmembers class * {
    @retrofit.http.* <methods>;
}

-keepattributes Signature
-keepattributes *Annotation*


-dontwarn javax.annotation.**

# A resource is loaded with a relative path so the package of this class must be preserved.
-adaptresourcefilenames okhttp3/internal/publicsuffix/PublicSuffixDatabase.gz

# Animal Sniffer compileOnly dependency to ensure APIs are compatible with older versions of Java.
-dontwarn org.codehaus.mojo.animal_sniffer.*

# OkHttp platform used only on JVM and when Conscrypt and other security providers are available.
-dontwarn okhttp3.internal.platform.**
-dontwarn org.conscrypt.**
-dontwarn org.bouncycastle.**
-dontwarn org.openjsse.**

-repackageclasses
-ignorewarnings

# Retrofit does reflection on generic parameters. InnerClasses is required to use Signature and
# EnclosingMethod is required to use InnerClasses.
-keepattributes Signature, InnerClasses, EnclosingMethod

# Retrofit does reflection on method and parameter annotations.
-keepattributes RuntimeVisibleAnnotations, RuntimeVisibleParameterAnnotations

# Keep annotation default values (e.g., retrofit2.http.Field.encoded).
-keepattributes AnnotationDefault

# Retain service method parameters when optimizing.
-keepclassmembers,allowshrinking,allowobfuscation interface * {
    @retrofit2.http.* <methods>;
}

# Ignore JSR 305 annotations for embedding nullability information.
-dontwarn javax.annotation.**

# Guarded by a NoClassDefFoundError try/catch and only used when on the classpath.
-dontwarn kotlin.Unit

# Top-level functions that can only be used by Kotlin.
-dontwarn retrofit2.KotlinExtensions
-dontwarn retrofit2.KotlinExtensions$*

# With R8 full mode, it sees no subtypes of Retrofit interfaces since they are created with a Proxy
# and replaces all potential values with null. Explicitly keeping the interfaces prevents this.
-if interface * { @retrofit2.http.* <methods>; }
-keep,allowobfuscation interface <1>

# Keep inherited services.
-if interface * { @retrofit2.http.* <methods>; }
-keep,allowobfuscation interface * extends <1>

# Keep generic signature of Call, Response (R8 full mode strips signatures from non-kept items).
-keep,allowobfuscation,allowshrinking interface retrofit2.Call
-keep,allowobfuscation,allowshrinking class retrofit2.Response

# With R8 full mode generic signatures are stripped for classes that are not
# kept. Suspend functions are wrapped in continuations where the type argument
# is used.
-keep,allowobfuscation,allowshrinking class kotlin.coroutines.Continuation


# Animal Sniffer compileOnly dependency to ensure APIs are compatible with older versions of Java.
-dontwarn org.codehaus.mojo.animal_sniffer.*

#-keep public class com.itextpdf.**
-keep class com.itextpdf.** { *; }
-dontwarn com.itextpdf.*

-renamesourcefileattribute SourceFile

-dontwarn retrofit2.**
-keep class retrofit2.** {*;}

##---------------Begin: proguard configuration for Gson  ----------
# Gson uses generic type information stored in a class file when working with fields. Proguard
# removes such information by default, so configure it to keep all of it.
-keepattributes Signature

# For using GSON @Expose annotation
-keepattributes *Annotation*

# Gson specific classes
-dontwarn sun.misc.**
#-keep class com.google.gson.stream.** { *; }

# Application classes that will be serialized/deserialized over Gson
-keep class com.google.gson.examples.android.model.** { <fields>; }

# Prevent proguard from stripping interface information from TypeAdapter, TypeAdapterFactory,
# JsonSerializer, JsonDeserializer instances (so they can be used in @JsonAdapter)
-keep class * extends com.google.gson.TypeAdapter
-keep class * implements com.google.gson.TypeAdapterFactory
-keep class * implements com.google.gson.JsonSerializer
-keep class * implements com.google.gson.JsonDeserializer

# Prevent R8 from leaving Data object members always null
-keepclassmembers,allowobfuscation class * {
  @com.google.gson.annotations.SerializedName <fields>;
}


-keep class com.google.gson.reflect.TypeToken
-keep class * extends com.google.gson.reflect.TypeToken
-keep public class * implements java.lang.reflect.Type


# Retain generic signatures of TypeToken and its subclasses with R8 version 3.0 and higher.
-keep,allowobfuscation,allowshrinking class com.google.gson.reflect.TypeToken
-keep,allowobfuscation,allowshrinking class * extends com.google.gson.reflect.TypeToken

##---------------End: proguard configuration for Gson  ----------
-dontwarn org.slf4j.**

-keepdirectories src/main/res/font/*



-dontusemixedcaseclassnames
-verbose
-keepattributes *Annotation*

# For native methods, see http://proguard.sourceforge.net/manual/examples.html#native
-keepclasseswithmembernames class * {
    native <methods>;
}

# keep setters in Views so that animations can still work.
# see http://proguard.sourceforge.net/manual/examples.html#beans
-keepclassmembers public class * extends android.view.View {
   void set*(***);
   *** get*();
}

# We want to keep methods in Activity that could be used in the XML attribute onClick
-keepclassmembers class * extends android.app.Activity {
   public void *(android.view.View);
}

# For enumeration classes, see http://proguard.sourceforge.net/manual/examples.html#enumerations
-keepclassmembers enum * {
    public static **[] values();
    public static ** valueOf(java.lang.String);
}

-keep class * implements android.os.Parcelable {
  public static final android.os.Parcelable$Creator *;
}

-keepclassmembers class **.R$* {
    public static <fields>;
}

# Firebase
-keep class com.google.android.gms.** { *; }
-keep class com.google.firebase.** { *; }

# in order to provide the most meaningful crash reports, add the following line:
-keepattributes SourceFile,LineNumberTable
# If you are using custom exceptions, add this line so that custom exception types are skipped during obfuscation:
-keep public class * extends java.lang.Exception

-keep class com.crashlytics.** { *; }
-dontwarn com.crashlytics.**

# Jackson
-keep @com.fasterxml.jackson.annotation.JsonIgnoreProperties class * { *; }
-keep class com.fasterxml.** { *; }
-keep class org.codehaus.** { *; }
-keepnames class com.fasterxml.jackson.** { *; }
-keepclassmembers public final enum com.fasterxml.jackson.annotation.JsonAutoDetect$Visibility {
    public static final com.fasterxml.jackson.annotation.JsonAutoDetect$Visibility *;
}

# General
-keepattributes SourceFile,LineNumberTable,*Annotation*,EnclosingMethod,Signature,Exceptions,InnerClasses

此代码用于 parcelize 插件

# For enumeration classes, see http://proguard.sourceforge.net/manual/examples.html#enumerations
    -keepclassmembers enum * {
        public static **[] values();
        public static ** valueOf(java.lang.String);
    }
    
    -keep class * implements android.os.Parcelable {
      public static final android.os.Parcelable$Creator *;
    }
    
    -keepclassmembers class **.R$* {
        public static <fields>;
    }

升级到 AGP 8.0.1 后，发布的解决方案对我不起作用。我仍然收到 Retrofit 创建并通过 Dagger 模块提供的接口的 ClassCastException。

我能够使用注释来修复它。这将告诉编译器将接口保留在生成的字节码中，即使它未在代码中的其他任何地方使用。java.lang.ClassCastException@Keep

例如：

@Keep
interface MyApi {
  ...
}

我认为禁用 R8 全模式是解决方案，直到所有库都更新到 Gradle 8 并考虑 R8 全模式规则。

在 gradle.properties 中添加以下行：

android.enableR8.fullMode=false