启用 Proguard 时 Gson 会导致枚举字段崩溃

Question

就我而言

启用 Proguard 时 Proguard Gson 在枚举字段崩溃。

我的整个代码都在 kotlin 中。我通过将枚举保留在如下混淆器规则中得到了解决方案。

-keepclassmembers enum * {
   public *;
}

But I want to apply proguard to enum then How Can I do that? Below is my code.

data class Notification(
        @SerializedName("createdate")
        val createdate: String = "",
        @SerializedName("lastupdate")
        val lastupdate: String? = null,
        @SerializedName("member_id")
        val memberId: Int = 0,
        @SerializedName("notification_source")
        val notificationSource: PushType,
    ): Serializable

enum class

enum class PushType {
   Calendar,
   Reminder,
   Friend,
   Timeline,
   Savings,
   Email,
   MemoryBox,
   InstantMessage;
}

I also tried with below Enum

enum class PushType {
   @SerializedName("Calendar")
   Calendar,
   @SerializedName("Reminder")
   Reminder,
   @SerializedName("Friend")
   Friend,
   @SerializedName("Timeline")
   Timeline,
   @SerializedName("Savings")
   Savings,
   @SerializedName("Email")
   Email,
   @SerializedName("MemoryBox")
   MemoryBox,
   @SerializedName("InstantMessage")
   InstantMessage;
 }

I have tried below 2 solution

1. https://medium.com/@hanru.yeh/gson-will-crash-at-enum-fields-in-custom-class-with-proguard-bbcf5ad1b623

2. https://medium.com/@hanru.yeh/custom-typeadapterfactory-for-enum-ignores-annotation-serializedname-3a3be550b6a8

After trying above solution crash issue fix but again when I trying to get detail it's giving me below error.

java.lang.NullPointerException: 尝试在空对象引用

上调用虚拟方法'int java.lang.Enum.ordinal()'

Answer 1

将 "notification_source" 的数据类型更改为字符串并像这样使用枚举

@StringDef(Calendar, Reminder, Friend, Timeline, Savings, Email, MemoryBox, InstantMessage)
@Retention(AnnotationRetention.SOURCE)
annotation class PushType {
    companion object {
        const val Calendar = "Calendar"
        const val Reminder = "Reminder"
        const val Friend = "Friend"
        const val Timeline = "Timeline"
        const val Savings = "Savings"
        const val Email = "Email"
        const val MemoryBox = "MemoryBox"
        const val InstantMessage = "InstantMessage"
    }
}