Android代码混淆的实践
做Android开发的应该都知道,如果APK没有混淆打包,里面的代码反编译之后就跟明文没什么区别了,最近用proguard混淆用的比较多,这里记录下,以免以后忘了查看1. 基本配置
eclipse下建立android工程,就会生成proguard.cfg和project.properties,在后面的文件追加proguard.config=proguard.cfg即可让前面的配置文件在export时生效。默认的那个文件有一些内容,这里给一个更通用点的。
[html]
##---------------Begin: proguard configuration common for all Android apps ----------
-optimizationpasses 5
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-dontskipnonpubliclibraryclassmembers
-dontpreverify
-verbose
-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*
-keepattributes *Annotation*
-renamesourcefileattribute SourceFile
-keepattributes SourceFile,LineNumberTable
# 以下两个命令配合让类的路径给删除了
-allowaccessmodification
-repackageclasses ''
# 记录生成的日志数据,在proguard目录下
-dump class_files.txt
-printseeds seeds.txt
-printusage unused.txt
-printmapping mapping.txt
# 异常都可以忽略就打开
#-dontwarn
-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
-keepnames class * implements java.io.Serializable
# Explicitly preserve all serialization members. The Serializable inte易做图ce
# is only a marker inte易做图ce, 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$* {
public static <fields>;
}
# Preserve the special static methods that are required in all enumeration classes.
-keepclassmembers enum * {
public static **[] values();
public static ** valueOf(java.lang.String);
}
-keep class * implements android.os.Parcelable {
public static final android.os.Parcelable$Creator *;
}
# 如果你的工程是对外提供方法调用就打开
#-keep public class * {
# public protected *;
#}
##---------------End: proguard configuration common for all Android apps ----------
2. 解决export打包的报错
这个时候export提示“conversion to Dalvik format failed with error 1”错误,网上说法有好多种,最后我还是把proguard从4.4升级到4.8就解决了。官方地址是http://proguard.sourceforge.net。上面的配置文件参数可以在这里查阅。
升级办法很简单,就是把android sdk目录下的tool/proguard目录覆盖一下即可。
3. 打包出来的程序如何调试
一旦打包出来,就不能用eclipse的logcat去看了,这里可以用android sdk中ddms.bat的tool来看,一用就发现和logcat其实还是一个东西,就是多了个设备的选择。
在android上最好去下载一个logcat阅读器,这样在手机上运行崩溃了,不用连电脑也能查看日志了。可以再这里下载http://static.apk.hiapk.com/html/2012/03/438120.html。
4. 使用 gson 需要的配置
当Gson用到了泛型就会有报错,这个真给郁闷了半天,提示“Missing type parameter”。最后找到一个资料给了一个解决办法,参考:http://stackoverflow.com/questions/8129040/proguard-missing-type-parameter。
另外我又用到了JsonObject,提交的Object里面的members居然被改成了a。所以上面给的东西还不够,还要加上
[html]
# 用到自己拼接的JsonObject
-keep class com.google.gson.JsonObject { *; }
我个人建议减少这些依赖包混淆带来的麻烦,干脆都全部保留不混淆。例如
[html]
-keep class com.badlogic.** { *; }
-keep class * implements com.badlogic.gdx.utils.Json*
-keep class com.google.** { *;
注意:就算这样配置了,在混淆打包的时候,gson依然可能会报错,如果还报错,请加上如下代码:
[html] www.zzzyk.com
##---------------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.** { *; }
&n
补充:移动开发 , Android ,