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。

我已经研究了ProGuard配置与GSON和Android的兼容性，并遇到了由google-gson
https://code.google.com/p/google-gson/source/browse/trunk/examples/android-
proguard-
提供的示例示例/proguard.cfg。

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. 我看到该文件自2011年以来就没有更新过，是否仍建议使用？我问，因为从那时起Android / GSON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. 如果不建议这样做，那么在Android中是否有针对GSON的新推荐ProGuard配置？

Answer 1

我认为默认情况下，Android SDK中已包含您拥有的大多数设置。

因此，您可以删除其中的大多数，仅保留GSON专用部分。

我正在使用Android SDK Tools 22.6.3及更高版本的ProGuard在Eclipse中进行开发。

这是我用于GSON
2.2.4的内容（按照他们的示例）：

##---------------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.** { *; }

它看起来和您所拥有的完全一样，只是我不需要有关注释的内容。

您可以看到我已经注释掉了一些自己添加的类。如果要序列化/反序列化自己的类，则需要在此处声明它们以代替对的引用mypersonalclass.data.model。这一点非常重要，因为您不希望ProGuard混淆GSON用于序列化的字段或类名。

我总是在其中保留这些类型的注释，因此我知道如何配置下一个库或应用程序。