Android 签名 APK 使用改造加载 json 数据

Question

我有一个应用程序使用改装从服务器上的 json 文件加载数据。当我运行真实设备或 AVD 上的应用程序加载 json 到我的 recyclerview 的项目时，一切都很好。但是当我构建一个签名的 APK 然后安装应用程序时，它不会加载 json 的数据，比如我的图片 url 和 ...

    # 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

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


-dontwarn javax.annotation.**
-dontwarn okhttp3.**
-dontwarn okio.**
-dontwarn javax.annotation.**
-dontwarn org.conscrypt.**
# A resource is loaded with a relative path so the package of this class must be preserved.
-keepnames class okhttp3.internal.publicsuffix.PublicSuffixDatabase
-dontwarn retrofit2.Platform$Java8


# 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


# Retrofit
-keep class com.google.gson.** { *; }
-keep public class com.google.gson.** {public private protected *;}
-keep class com.google.inject.** { *; }
-keep class org.apache.http.** { *; }
-keep class org.apache.james.mime4j.** { *; }
-keep class javax.inject.** { *; }
-keep class javax.xml.stream.** { *; }
-keep class retrofit.** { *; }
-keep class com.google.appengine.** { *; }
-keepattributes *Annotation*
-keepattributes Signature
-dontwarn com.squareup.okhttp.*
-dontwarn rx.**
-dontwarn javax.xml.stream.**
-dontwarn com.google.appengine.**
-dontwarn java.nio.file.**

# Retrofit 2.X
## https://square.github.io/retrofit/ ##

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

-keepclasseswithmembers class * {
    @retrofit2.http.* <methods>;
}
-keep class io.plaidapp.data.api.dribbble.model.** { *; }

-keep public class android.support.design.widget.BottomNavigationView { *; }
-keep public class android.support.design.internal.BottomNavigationMenuView { *; }
-keep public class android.support.design.internal.BottomNavigationPresenter { *; }
-keep public class android.support.design.internal.BottomNavigationItemView { *; }

Answer 1

当您生成已签名的应用程序时，ProGuard 会针对您的代码执行其缩小规则。你提到你正在使用 Retrofit。 Retrofit 的文档包括您的应用程序中也需要包含的 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

此外，由于 Retrofit 构建于 Okio 之上，您可能还需要包含 Okio proguard 规则：

-dontwarn okio.**

Answer 2

在您的 build.gradle 文件中将 minifyEnabled 设置为 false。

buildTypes {
    release {
        minifyEnabled false

Answer 3

在使用 proguard 时，您需要保持模型类用于 Retrofit。

使用 -keepclass 并指定所有 model/pojo 类.

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

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

Android 签名 APK 使用改造加载 json 数据

Android signed APK loading json data using retrofit

android

android-studio

retrofit2

okhttp3