即使使用 -keep，kotlin 类的构造函数中的参数名称也会被 proguard 删除

Question

我有一个具有以下构造函数的类：

class Configuration @JvmOverloads constructor(val applicationId: String, typesToAutomaticallyLoad: List<AutoLoadableType>,
                                                    val isTestMode: Boolean = false, var userId: String? = null,
                                                    private var videoNetworks: List<MDNetwork> = MDNetwork.values().toMutableList(),
                                                    private var networks: List<MDAdNetwork> = MDNetwork.values().toMutableList(),
                                                    var loadingTimeoutMs: Long = 20000) 

我的 proguard 文件：

-keep class mypackage.** {
    <init>(...);
    *;
}

禁用 minify 后我得到：

   @JvmOverloads
   public Configuration(@NotNull String applicationId, @NotNull List typesToAutomaticallyLoad, boolean isTestMode, @Nullable String userId, @NotNull List videoNetworks, @NotNull List networks) {
      this(applicationId, typesToAutomaticallyLoad, isTestMode, userId, videoNetworks, networks, 0L, 64, (DefaultConstructorMarker)null);
   }

   @JvmOverloads
   public Configuration(@NotNull String applicationId, @NotNull List typesToAutomaticallyLoad, boolean isTestMode, @Nullable String userId, @NotNull List videoNetworks) {
      this(applicationId, typesToAutomaticallyLoad, isTestMode, userId, videoNetworks, (List)null, 0L, 96, (DefaultConstructorMarker)null);
   }

   @JvmOverloads
   public Configuration(@NotNull String applicationId, @NotNull List typesToAutomaticallyLoad, boolean isTestMode, @Nullable String userId) {
      this(applicationId, typesToAutomaticallyLoad, isTestMode, userId, (List)null, (List)null, 0L, 112, (DefaultConstructorMarker)null);
   }

   @JvmOverloads
   public Configuration(@NotNull String applicationId, @NotNull List typesToAutomaticallyLoad, boolean isTestMode) {
      this(applicationId, typesToAutomaticallyLoad, isTestMode, (String)null, (List)null, (List)null, 0L, 120, (DefaultConstructorMarker)null);
   }

   @JvmOverloads
   public Configuration(@NotNull String applicationId, @NotNull List typesToAutomaticallyLoad) {
      this(applicationId, typesToAutomaticallyLoad, false, (String)null, (List)null, (List)null, 0L, 124, (DefaultConstructorMarker)null);
   }

启用 minify 后我得到：

   @JvmOverloads
   public Configuration(@NotNull String var1, @NotNull List var2, boolean var3, @Nullable String var4, @NotNull List var5, @NotNull List var6) {
      this(var1, var2, var3, var4, var5, var6, 0L, 64, (DefaultConstructorMarker)null);
   }

   @JvmOverloads
   public Configuration(@NotNull String var1, @NotNull List var2, boolean var3, @Nullable String var4, @NotNull List var5) {
      this(var1, var2, var3, var4, var5, (List)null, 0L, 96, (DefaultConstructorMarker)null);
   }

   @JvmOverloads
   public Configuration(@NotNull String var1, @NotNull List var2, boolean var3, @Nullable String var4) {
      this(var1, var2, var3, var4, (List)null, (List)null, 0L, 112, (DefaultConstructorMarker)null);
   }

   @JvmOverloads
   public Configuration(@NotNull String var1, @NotNull List var2, boolean var3) {
      this(var1, var2, var3, (String)null, (List)null, (List)null, 0L, 120, (DefaultConstructorMarker)null);
   }

   @JvmOverloads
   public Configuration(@NotNull String var1, @NotNull List var2) {
      this(var1, var2, false, (String)null, (List)null, (List)null, 0L, 124, (DefaultConstructorMarker)null);
   }

所以这个 proguard 配置保留了类名、构造函数名称，但不保留参数名称。

如何让它也保留参数名称？

Answer 1

您必须添加 @SerializedName("...") 以及所有参数，

数据类SyncUser( @SerializedName(“用户”) 有效用户：用户 )

Answer 2

这都是关于 Kotlin 元数据的。我在这里建议两件事：

• 为 ProGuard/R8 添加该元数据文件的规则：

    -keep class kotlin.Metadata
    -keep,allowobfuscation class kotlin.Metadata { *; }

• 确保保持 Kotlin 版本、AGP 和 D8/R8 版本之间的兼容性。 D8/R8 中的重大更改会破坏元数据文件，使其无法被 Kotlin 解释。参考：https://developer.android.com/build/kotlin-support