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Moshi KotlinJsonAdapterFactoryは、minifyを有効にするとJsonを解析できません

Androidアプリを開発しました。依存関係の1つとしてMoshiを使用しています。

今日、私はこのプロジェクトのミニファイを有効にしたいと思います。だから私は_minifyEnabled true_に_build.gradle_を設定しました。

その後、サーバーからのすべての応答がnullになることがわかりました。

まず、Retrofit2を使用してAPIを呼び出しています。 Response.body()のJSON本文はnullではなく、正しい値を持っています。

応答本文は以下のとおりです（簡略化）。

_{"status":"success","data":{"user": "I am a user"}}_

そして、私はそれを自分のオブジェクトに変換するために以下のコードを使用しています：

val someResponse = Moshi.Builder().add(KotlinJsonAdapterFactory()).build().adapter(SomeResponse::class.Java).fromJson(theJsonString)

SomeResponseのコード：

_class SomeResponse {
    @Json(name="status")
    var status: String? = null

    @Json(name="data")
    var data: User? = null
}
_

そして、単純に_Log.i("Moshi", "${someResponse.status}"_を使用して値を確認すると、結果はnullになります。

私はすでにMoshi GithubのREADMEセクションで指定されているプロガードルール、つまり this one および this one ）を含めています。

なぜ、どうすればこれを解決できますか？

参考までに、以下は私の完全な_proguard-rules.pro_です。

_# 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, *Annotation*

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


#Crashlytics: https://docs.fabric.io/Android/crashlytics/dex-and-proguard.html
-keepattributes *Annotation*
-keep public class * extends Java.lang.Exception


#https://stackoverflow.com/questions/36816521/is-the-format-of-the-data-held-in-kotlin-metadata-documented-anywhere
-dontwarn kotlin.**
-dontwarn kotlin.reflect.jvm.internal.**
-keep class kotlin.reflect.jvm.internal.** { *; }
-keep class kotlin.Metadata { *; }
-keepclassmembers public class com.example.app.** {
    public synthetic <methods>;
}
-keepclassmembers class kotlin.Metadata {
    public <methods>;
}
-keepclassmembers class **$WhenMappings {
    <fields>;
}
-keep class kotlin.reflect.jvm.internal.impl.builtins.BuiltInsLoaderImpl

#All models
-keep class com.example.app.models.**

#######Retrofit#######
#https://github.com/square/retrofit/blob/master/retrofit/src/main/resources/META-INF/proguard/retrofit2.pro
# 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

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

# Ignore annotation used for build tooling.
-dontwarn org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement

# 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

# 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>



#######OkHttp3######
#https://github.com/square/okhttp/blob/master/okhttp/src/main/resources/META-INF/proguard/okhttp3.pro
# JSR 305 annotations are for embedding nullability information.
-dontwarn javax.annotation.**

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

# 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 dependency is available.
-dontwarn okhttp3.internal.platform.ConscryptPlatform




######Okio######
#https://github.com/square/okio/blob/master/okio/src/jvmMain/resources/META-INF/proguard/okio.pro
# Animal Sniffer compileOnly dependency to ensure APIs are compatible with older versions of Java.
-dontwarn org.codehaus.mojo.animal_sniffer.*





####Moshi####
#https://github.com/square/moshi/blob/master/moshi/src/main/resources/META-INF/proguard/moshi.pro
#https://github.com/square/moshi/blob/master/kotlin/reflect/src/main/resources/META-INF/proguard/moshi-kotlin.pro
# JSR 305 annotations are for embedding nullability information.
-dontwarn javax.annotation.**

-keepclasseswithmembers class * {
    @com.squareup.moshi.* <methods>;
}

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

# Enum field names are used by the integrated EnumJsonAdapter.
# Annotate enums with @JsonClass(generateAdapter = false) to use them with Moshi.
-keepclassmembers @com.squareup.moshi.JsonClass class * extends Java.lang.Enum {
    <fields>;
}

# The name of @JsonClass types is used to look up the generated adapter.
-keepnames @com.squareup.moshi.JsonClass class *

# Retain generated JsonAdapters if annotated type is retained.
-if @com.squareup.moshi.JsonClass class *
-keep class <1>JsonAdapter {
    <init>(...);
    <fields>;
}
-if @com.squareup.moshi.JsonClass class **$*
-keep class <1>_<2>JsonAdapter {
    <init>(...);
    <fields>;
}
-if @com.squareup.moshi.JsonClass class **$*$*
-keep class <1>_<2>_<3>JsonAdapter {
    <init>(...);
    <fields>;
}
-if @com.squareup.moshi.JsonClass class **$*$*$*
-keep class <1>_<2>_<3>_<4>JsonAdapter {
    <init>(...);
    <fields>;
}
-if @com.squareup.moshi.JsonClass class **$*$*$*$*
-keep class <1>_<2>_<3>_<4>_<5>JsonAdapter {
    <init>(...);
    <fields>;
}
-if @com.squareup.moshi.JsonClass class **$*$*$*$*$*
-keep class <1>_<2>_<3>_<4>_<5>_<6>JsonAdapter {
    <init>(...);
    <fields>;
}
-keep class kotlin.reflect.jvm.internal.impl.builtins.BuiltInsLoaderImpl

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






####Mp4 Marser####
-keep class com.coremedia.iso.** {*;}
-keep class com.googlecode.mp4parser.** {*;}
-keep class com.mp4parser.** {*;}

-dontwarn com.coremedia.**
-dontwarn com.googlecode.mp4parser.**



####Picasso#####
#https://github.com/square/picasso/blob/master/picasso/consumer-proguard-rules.txt
# Platform calls Class.forName on types which do not exist on Android to determine platform.
-dontnote okhttp3.internal.Platform
# Java.nio.file.* usage which cannot be used at runtime. Animal sniffer annotation.
-dontwarn okio.Okio
# JDK 7-only method which is @hide on Android. Animal sniffer annotation.
-dontwarn okio.DeflaterSink



#Ignore all other 3rd party libraries for now as we don't really care about the size but more about code obfuscation.
-keep class de.hdodenhof.**
-keep class io.github.luizgrp.sectionedrecyclerviewadapter.**
-keep class q.rorbin.badgeview.**
-keep class com.theartofdev.edmodo.**
-keep class me.relex
-keep class com.tbruyelle.rxpermissions2.**
-keep class com.github.pwittchen.reactivenetwork.**
-keep class com.minimize.Android.rxrecycleradapter.**
-keep class at.blogc.Android.**
-keep class com.yarolegovich.**
-keep class cn.trinea.Android.view.autoscrollviewpager.**
-keep class com.apkfuns.logutils.**
_
androidkotlinminifymoshi
11
Sira Lam
-keepclasseswithmembers class * {
    @com.squareup.moshi.* <methods>;
}
-keep @com.squareup.moshi.JsonQualifier interface *
-dontwarn org.jetbrains.annotations.**
-keep class kotlin.Metadata { *; }
-keepclassmembers class kotlin.Metadata {
    public <methods>;
}

-keepclassmembers class * {
    @com.squareup.moshi.FromJson <methods>;
    @com.squareup.moshi.ToJson <methods>;
}

-keepnames @kotlin.Metadata class (Change with Yourpackagename) com.myapp.packagename.model.**
-keep class (Change with Yourpackagename) com.myapp.packagnename.model.** { *; }
-keepclassmembers class (Change with Yourpackagename) com.myapp.packagename.model.** { *; }

Com.myapp.packagnenameをパッケージ名に変更します

[〜＃〜]または[〜＃〜]

Moshi-kotlinを kotshi に置き換えます。これは、特別なルールなしでProguardで正常に機能し、最終的なAPKで数百キロバイトをドロップします。

1
Sachin Kasaraddi

これをproguard-rules.proファイルに追加してみてください。これがお役に立てば幸いです。

# Moshi
-keepclassmembers class ** {
  @com.squareup.moshi.FromJson *;
  @com.squareup.moshi.ToJson *;
}
0
ArbenMaloku

ここでの解決策は簡単だと思います。@ Keep-注釈をモデル（一部の応答）に追加し、マーシャリング名を難読化しないようにします。 :-)

0
Zholoth

Moshiの「codegen」注釈プロセッサを使用することもできます。

依存関係を追加します。

kapt "com.squareup.moshi:moshi-kotlin-codegen:1.9.2"

次に、@JsonClassを使用してモデルに注釈を付けます。

@JsonClass(generateAdapter = true)
data class MyModel(...)

また、モデルで使用される列挙型クラスに注釈を付ける必要がありますが、それらにはアダプターは必要ありません。

@JsonClass(generateAdapter = false)
enum class MyEnumClass { ... }

前述の here および here のMoshi Proguardルールも必要です。

0
Philio