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android - Moshi Json 注释不适用于 proguard

问题描述

我按照https://github.com/square/moshi添加了对 moshi 和 proguard 规则的 gradle 依赖，然后我编写代码进行验证。

data class Car(
    @Json(name = "low_speed")  val lowSpeed: Int,
    @Json(name = "high_speed") val highSpeed: Int
)

val moshi = Moshi.Builder()
            .add(KotlinJsonAdapterFactory())
            .build()
val jsonAdapter = moshi.adapter(Car::class.java)

val json = "{\"low_speed\": 10, \"high_speed\": 20}"
val car = jsonAdapter.fromJson(json)

if (car != null) {
    Toast.makeText(this, "${car.lowSpeed}+${car.highSpeed}", Toast.LENGTH_LONG).show()
}

当我在调试模式下运行它时，它显示“10+20”，这是预期的，但是当我在发布模式下运行（启用了 proguard）时，我看到了“0+0”。

我的 proguard-rules.pro 文件：

# Retain generic type information for use by reflection by converters     and adapters.
-keepattributes Signature
# Retain declared checked exceptions for use by a Proxy instance.
-keepattributes Exceptions

# Common Stuff to Keep
-keepattributes *Annotation*
-keepattributes JavascriptInterface

# OkHttp
-dontwarn javax.annotation.**
-keepnames class okhttp3.internal.publicsuffix.PublicSuffixDatabase
-dontwarn org.codehaus.mojo.animal_sniffer.*
-dontwarn okhttp3.internal.platform.ConscryptPlatform

# okIo
-dontwarn okio.**

#moshi
# JSR 305 annotations are for embedding nullability information.
-keepclasseswithmembers class * {
    @com.squareup.moshi.* <methods>;
}

-keep @com.squareup.moshi.JsonQualifier interface *

# Enum field names are used by the integrated EnumJsonAdapter.
# values() is synthesized by the Kotlin compiler and is used by EnumJsonAdapter indirectly
# Annotate enums with @JsonClass(generateAdapter = false) to use them with Moshi.
-keepclassmembers @com.squareup.moshi.JsonClass class * extends java.lang.Enum {
    <fields>;
    **[] values();
}

#moshi-kotlin
-keep class kotlin.reflect.jvm.internal.impl.builtins.BuiltInsLoaderImpl

-keepclassmembers class kotlin.Metadata {
    public <methods>;
}

我的 build.gradle 依赖：

// moshi
implementation("com.squareup.moshi:moshi:1.9.2")
implementation("com.squareup.moshi:moshi-kotlin:1.9.2")

// okhttp
implementation "com.squareup.okhttp3:okhttp:3.10.0"

我想我错过了 moshi 和 proguard 的一些东西，但我真的不知道它是什么

标签： androidjsonmoshi

解决方案

尝试添加：

@JsonClass(generateAdapter = false)

并将这些行添加到 proguard ：

-keepclassmembernames @com.squareup.moshi.JsonClass class * extends java.lang.Enum {
    <fields>;
}

信用-> https://github.com/square/moshi/issues/689

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