Retrofit 2.3.0 生成签名 APK 时出错答案

【问题标题】：Retrofit 2.3.0 Error while generating signed APKRetrofit 2.3.0 生成签名 APK 时出错
【发布时间】：2017-10-15 09:38:07
【问题描述】：

我已经更新了 Retrofit v 2.3.0 和 okhttp 3.8.0 和 okio 1.13.0 但现在当我尝试生成签名的 APK 时出现以下错误：

Warning:retrofit2.OkHttpCall: can't find referenced class javax.annotation.concurrent.GuardedBy
Warning:there were 3 unresolved references to classes or interfaces.
Warning:Exception while processing task java.io.IOException: Please correct the above warnings first.
Error:Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease'.

Job failed, see logs for details

以下是他们建议的我用于 Retrofit 和 OKHTTP 的 proguard 规则

# 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
-dontwarn org.xmlpull.v1.**
-dontwarn okhttp3.**
-keep class okhttp3.** { *; }
-dontwarn okio.**
-dontwarn javax.annotation.Nullable
-dontwarn javax.annotation.ParametersAreNonnullByDefault

我还需要补充什么？任何帮助将不胜感激。

【问题讨论】：

尝试添加这些：-dontwarn retrofit2.** -keep class retrofit2.** { ; } -keepattributes 签名 -keepattributes 例外 -keepclasseswithmembers 类 * { @retrofit2.http. ; }

标签： android proguard retrofit2

【解决方案1】：

正如 JakeWharton 在 GitHub 上所说，我们只需要添加以下行：

-dontwarn javax.annotation.**

不需要这个

-keep class okhttp3.** { *; }

【讨论】：

【解决方案2】：

确保在 Proguard 中包含以下行以使用 Retrofit 2

-dontwarn retrofit2.**
-keep class retrofit2.** { *; }
-keepattributes Signature
-keepattributes Exceptions

-keepclasseswithmembers class * {
    @retrofit2.http.* <methods>;
}
-keepclasseswithmembers interface * {
    @retrofit2.http.* <methods>;
}

【讨论】：