java - 适用于 Android 和 GSON 的 ProGuard

Question

我正在为我的 Android 项目设置 ProGuard。我的项目也使用 GSON。

我研究了与 GSON 和 Android 兼容的 ProGuard 配置，并遇到了 google-gson https://code.google.com/p/google-gson/source/browse/trunk/examples/android-proguard-example/proguard.cfg 提供的这个示例.

ProGuard 配置复制如下:

##---------------Begin: proguard configuration common for all Android apps ----------
-optimizationpasses 5
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-dontskipnonpubliclibraryclassmembers
-dontpreverify
-verbose
-dump class_files.txt
-printseeds seeds.txt
-printusage unused.txt
-printmapping mapping.txt
-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*

-allowaccessmodification
-keepattributes *Annotation*
-renamesourcefileattribute SourceFile
-keepattributes SourceFile,LineNumberTable
-repackageclasses ''

-keep public class * extends android.app.Activity
-keep public class * extends android.app.Application
-keep public class * extends android.app.Service
-keep public class * extends android.content.BroadcastReceiver
-keep public class * extends android.content.ContentProvider
-keep public class * extends android.app.backup.BackupAgentHelper
-keep public class * extends android.preference.Preference
-keep public class com.android.vending.licensing.ILicensingService
-dontnote com.android.vending.licensing.ILicensingService

# Explicitly preserve all serialization members. The Serializable interface
# is only a marker interface, so it wouldn't save them.
-keepclassmembers class * implements java.io.Serializable {
    static final long serialVersionUID;
    private static final java.io.ObjectStreamField[] serialPersistentFields;
    private void writeObject(java.io.ObjectOutputStream);
    private void readObject(java.io.ObjectInputStream);
    java.lang.Object writeReplace();
    java.lang.Object readResolve();
}

# Preserve all native method names and the names of their classes.
-keepclasseswithmembernames class * {
    native <methods>;
}

-keepclasseswithmembernames class * {
    public <init>(android.content.Context, android.util.AttributeSet);
}

-keepclasseswithmembernames class * {
    public <init>(android.content.Context, android.util.AttributeSet, int);
}

# Preserve static fields of inner classes of R classes that might be accessed
# through introspection.
-keepclassmembers class **.R$* {
  public static <fields>;
}

# Preserve the special static methods that are required in all enumeration classes.
-keepclassmembers enum * {
    public static **[] values();
    public static ** valueOf(java.lang.String);
}

-keep public class * {
    public protected *;
}

-keep class * implements android.os.Parcelable {
  public static final android.os.Parcelable$Creator *;
}
##---------------End: proguard configuration common for all Android apps ----------

##---------------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
-keep class sun.misc.Unsafe { *; }
#-keep class com.google.gson.stream.** { *; }

# Application classes that will be serialized/deserialized over Gson
-keep class com.google.gson.examples.android.model.** { *; }

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

问题:

1. 我看到这个文件从 2011 年就没有更新过了，还推荐使用吗？我问是因为 Android/GSON 从那时起发生了很大变化，所以我不知道上面有多少是不必要的或不正确的。

2. 如果不推荐，是否有新的推荐用于 Android 中的 GSON 的 ProGuard 配置？

Answer 1

我认为您的大部分设置已经默认包含在 Android SDK 中。

因此您可以删除其中的大部分，只留下专门介绍 GSON 的部分。

---

我正在使用 Android SDK Tools 22.6.3 和任何版本的 ProGuard 在 Eclipse 中进行开发。

这是我用于 GSON 2.2.4 (as per their example) 的内容:

##---------------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

# Gson specific classes
-keep class sun.misc.Unsafe { *; }
#-keep class com.google.gson.stream.** { *; }

# Application classes that will be serialized/deserialized over Gson
# -keep class mypersonalclass.data.model.** { *; }

它看起来和你的完全一样，除了我不需要关于注释的那一行。

---

你可以看到我已经注释掉了一些我自己添加的类。如果您对自己的类进行序列化/反序列化，则需要在此处声明它们以代替对 mypersonalclass.data.model 的引用。这非常重要，因为您不希望 ProGuard 混淆 GSON 用于序列化的字段或类名。

我总是在那里留下这些类型的评论，所以我知道如何配置下一个库或应用程序。