使用 proguard Retrofit2 和 GSON Converter 时出错

Question

我正在创建一个原生 Android 应用程序，我想发布它。

我正在使用改装和 Gson 转换器。也是一个搜索视图。 对于该版本，我已经按照改造的建议设置了混淆器规则：

# Add project specific ProGuard rules here.
-dontwarn javax.**
-keep class android.support.v7.widget.SearchView { *; }

# Retrofit
-dontwarn okhttp3.**
-dontwarn okio.**
# Platform calls Class.forName on types which do not exist on Android to determine platform.
-dontnote retrofit2.Platform
# Platform used when running on Java 8 VMs. Will not be used at runtime.
-dontwarn retrofit2.Platform$Java8
# 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

在改造中我使用： ApiUtils.java

 public static PBTService getPBTService(String BASE_URL) {
        return RetrofitClient.getClient(BASE_URL).create(PBTService.class);
    }

服务.java

import br.com.adley.ipubg.data.Player;
import retrofit2.Call;
import retrofit2.http.GET;
import retrofit2.http.Headers;
import retrofit2.http.Path;

public interface PBTService {
    String API_KEY = "MYKEY";
    @Headers(API_KEY)
    @GET("profile/pc/{nickname}")
    Call<Player> getPlayerStatsByNickname(@Path("nickname") String nickname);

}

RetrofitClient.java

import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;

public class RetrofitClient {

    private static Retrofit retrofit = null;

    public static Retrofit getClient(String baseUrl) {
        if (retrofit==null) {
            retrofit = new Retrofit.Builder()
                    .baseUrl(baseUrl)
                    .addConverterFactory(GsonConverterFactory.create())
                    .build();
        }

        return retrofit;
    }
}

在调试模式下或当 proguard 离线时它可以完美工作。 但是，当我使用 proguard 生成签名应用程序并使用改造执行 GET 时，出现以下错误：

java.lang.IllegalArgumentException: Unable to create converter for class br.com.adley.ipubg.a.a for method a.a

我尝试了很多混淆器配置。我可能认为该错误与 GSON 转换器有关。

我已经尝试过：

#My retrofit service package
-keep public class br.com.adley.ipubg.data.** {public private protected *;}
-keep public class br.com.adley.ipubg.activities.MainActivity.** {public private protected *;}
#others configs
-keep class com.google.gson.** { ; }
-keep class sun.misc.Unsafe { *; }
-keep class com.google.gson.stream.** { *; }:
-keep public class com.google.gson.**
-keep public class com.google.gson.** {public private protected *;}

更新

我已将 GSON 配置添加到 pro-guard：

##---------------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 br.com.adley.ipubg.data.models.MatchHistory.** { *; }
-keep class br.com.adley.ipubg.data.models.Player.** { *; }
-keep class br.com.adley.ipubg.data.models.Season.** { *; }
-keep class br.com.adley.ipubg.data.models.Stats.** { *; }

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

##---------------End: proguard configuration for Gson  ----------

但仍然出现错误：

java.lang.IllegalArgumentException: Unable to create converter for class br.com.adley.ipubg.data.models.Player for method a.a

Answer 1

查看评论后，我添加了 GSON proguard 规则并进行了改造。

另外，如果你有一个使用你的模型的包装器，请小心，它会导致转换错误。

我的最终支持后卫规则，现在正在运行，是：

# Add project specific ProGuard rules here.
-assumenosideeffects class android.util.Log {
    public static boolean isLoggable(java.lang.String, int);
    public static int v(...);
    public static int i(...);
    public static int w(...);
    public static int d(...);
    public static int e(...);
}

-dontwarn org.ini4j.** # Ignore warning for missing classes in ini4j
-dontwarn javax.**
-keep class android.support.v7.widget.SearchView { *; }

# Retrofit
-dontwarn okhttp3.**
-dontwarn okio.**
-dontnote retrofit2.Platform
-dontwarn retrofit2.Platform$Java8
-keepattributes Signature
-keepattributes Exceptions

##---------------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 br.com.adley.ipubg.data.** { *; }
-keep class br.com.adley.ipubg.wrapper.** { *; }

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

##---------------End: proguard configuration for Gson  ----------

谢谢大家的评论。

Answer 2

我和OP有同样的问题，在研究了多个来源之后，我将这3行添加到我的pro-guard配置文件中，他们解决了我的问题：

-keep class com.squareup.** { *; }
-keep class retrofit2.** { *; }
-keep class com.google.gson.** { *; }