042android初级篇之android混淆代码ProGuard

混淆代码能有效防止被反编译,防止自己的劳动成果被别人窃取;

混淆配置文件及开关的设置

配置文件的位置以及开关的设置位置,android studio 和eclipse稍微有些差异,这里以android sudio为例:

android工程中混淆配置文件:proguard-rules.pro (默认文件名)

混淆开关:

在 build.gradle

buildTypes {
    release {
        minifyEnabled true
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}

如上在buildTypes为release版本时,设置minifyEnabled为true,即使用proguard-rules.pro混淆脚本进行混淆。

解读一个混淆配置

proguard的语法规则可参考参考链接ProGuard在线说明手册

下面是我对一个配置加上了注释,详细看过了之后,便可以打造自己的简单配置了。

# To enable ProGuard in your project, edit project.properties  
# to define the proguard.config property as described in that file.  
#  
# Add project specific ProGuard rules here.  
# By default, the flags in this file are appended to flags specified  
# in ${sdk.dir}/tools/proguard/proguard-android.txt  
# You can edit the include path and order by changing the ProGuard  
# include property in project.properties.  
#  
# For more details, see  
#   http://developer.android.com/guide/developing/tools/proguard.html  
  
# Add any project specific keep options here:  
  
# 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 *;  
#}  

#optimizationpasses表示对代码进行迭代优化的次数,optimization可以对代码进行各种优化,每次优化后还可以继续优化,故称之迭代优化;
-optimizationpasses 5  
#混淆时不产生混合大小写的类名
-dontusemixedcaseclassnames  
#指定不去忽略非公共的库类
-dontskipnonpubliclibraryclasses  
#不预校验
-dontpreverify  

#显示混淆的log,帮助排错
-verbose  

#代码混淆采用的算法,一般不改变,使用谷歌默认算法即可
-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*  

#如果项目中有用到注释,则加入
-keepattributes *Annotation*  
-keepattributes Signature  
  
#用到的相关支持包
-libraryjars libs/apns_1.0.6.jar  
-libraryjars libs/armeabi/libBaiduMapSDK_v2_3_1.so  
-libraryjars libs/armeabi/liblocSDK4.so  
-libraryjars libs/baidumapapi_v2_3_1.jar  
-libraryjars libs/core.jar  
-libraryjars libs/gesture-imageview.jar  
-libraryjars libs/gson-2.0.jar  
-libraryjars libs/infogracesound.jar  
-libraryjars libs/locSDK_4.0.jar  
-libraryjars libs/ormlite-android-4.48.jar  
-libraryjars libs/ormlite-core-4.48.jar  
-libraryjars libs/universal-image-loader-1.9.0.jar

-keep class org.bouncycastle.** {*;}
-keep class com.android.signapk.** {*;}

  
#指定类不进行混淆,保持原样
-keep class com.baidu.** { *; }   
-keep class vi.com.gdi.bgl.android.**{*;}  
  
-keep public class * extends android.app.Fragment    
-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 * extends android.support.v4.**  
-keep public class com.android.vending.licensing.ILicensingService  
  
-keep class com.google.gson.stream.** { *; }  
-keep class com.google.gson.examples.android.model.** { *; }  
-keep class com.uuhelper.Application.** { *; }  
-keep class net.sourceforge.zbar.** { *; }  
-keep class com.google.android.gms.** { *; }   
  
-keep class com.bank.pingan.model.** { *; }  
  
-keep public class * extends com.j256.ormlite.android.apptools.OrmLiteSqliteOpenHelper  
-keep public class * extends com.j256.ormlite.android.apptools.OpenHelperManager  
   
-keep class com.android.vending.licensing.ILicensingService  
-keep class android.support.v4.** { *; }    
-keep class org.apache.commons.net.** { *; }    
-keep class com.tencent.** { *; }    
   
-keep class com.umeng.** { *; }    
-keep class com.umeng.analytics.** { *; }    
-keep class com.umeng.common.** { *; }    
-keep class com.umeng.newxp.** { *; }    
   
-keep class com.j256.ormlite.** { *; }    
-keep class com.j256.ormlite.android.** { *; }    
-keep class com.j256.ormlite.field.** { *; }    
-keep class com.j256.ormlite.stmt.** { *; }   
  

#这些有警告也不去处理
-dontwarn android.support.v4.**    
-dontwarn org.apache.commons.net.**   
-dontwarn com.tencent.**    

#如果用到了webview的复杂操作,则加入
-keepclassmembers class * extends android.webkit.WebViewClient {
     public void *(android.webkit.WebView,java.lang.String,android.graphics.Bitmap);
     public boolean *(android.webkit.WebView,java.lang.String);
}

-keepclassmembers class * extends android.webkit.WebChromeClient {
     public void *(android.webkit.WebView,java.lang.String);
}
 
#保持native方法不被混淆 
-keepclasseswithmembernames class * {  
    native ;  
}  
#保持自定义控件类,不被混淆
-keepclasseswithmembernames class * {  
    public (android.content.Context, android.util.AttributeSet);  
}  
  
-keepclasseswithmembernames class * {  
    public (android.content.Context, android.util.AttributeSet, int);  
}  

-keepclasseswithmembers class * {  
    public (android.content.Context);  
} 
#保持枚举类不进行混淆  
-keepclassmembers enum * {  
    public static **[] values();  
    public static ** valueOf(java.lang.String);  
}  
#保持 Parcelable 类不被混淆
-keep class * implements android.os.Parcelable {  
  public static final android.os.Parcelable$Creator *;  
}  
  
 
  
-dontshrink  
-dontoptimize  
-dontwarn com.google.android.maps.**  
-dontwarn android.webkit.WebView  
-dontwarn com.umeng.**  
-dontwarn com.tencent.weibo.sdk.**  
-dontwarn com.facebook.**  
  
-keep enum com.facebook.**  
-keepattributes Exceptions,InnerClasses,Signature  
-keepattributes *Annotation*  
-keepattributes SourceFile,LineNumberTable  
  
-keep public interface com.facebook.**  
-keep public interface com.tencent.**  
-keep public interface com.umeng.socialize.**  
-keep public interface com.umeng.socialize.sensor.**  
-keep public interface com.umeng.scrshot.**  
  
#不混淆该类及其成员变量
-keep public class com.umeng.socialize.* {*;}  
-keep public class javax.**  
-keep public class android.webkit.**  
  
-keep class com.facebook.**  
-keep class com.umeng.scrshot.**  
-keep public class com.tencent.** {*;}  
-keep class com.umeng.socialize.sensor.**  
  
-keep class com.tencent.mm.sdk.openapi.WXMediaMessage {*;}  
  
-keep class com.tencent.mm.sdk.openapi.** implements com.tencent.mm.sdk.openapi.WXMediaMessage$IMediaObject {*;}  
  
-keep class im.yixin.sdk.api.YXMessage {*;}  
-keep class im.yixin.sdk.api.** implements im.yixin.sdk.api.YXMessage$YXMessageData{*;}  
  
-keep public class [your_pkg].R$*{  
    public static final int *;  
}  

混淆产生的文件

1. mapping.txt

表示混淆前后代码的对照表,这个文件非常重要。如果你的代码混淆后会产生bug的话,log提示中是混淆后的代码,希望定位到源代码的话就可以根据mapping.txt反推。
每次发布都要保留它方便该版本出现问题时调出日志进行排查,它可以根据版本号或是发布时间命名来保存或是放进代码版本控制中。

2. dump.txt

描述apk内所有class文件的内部结构。

3. seeds.txt

列出了没有被混淆的类和成员。

4. usage.txt

列出了源代码中被删除在apk中不存在的代码。

主要事项

  1. 上一句保护,下一句启用modifers, 启用无效; 上一句启用modifiers,下一句保护,保护有效。 重在保护
  2. 使用了-dontshrink|dontoptimize|dontobfuscate 这些全局选项后,那么再使用相应的kepp modifiers 无效
  3. 当不使用-dontoptimize选项时,则-optimizations optimization_filter才有效

参考链接

  1. ProGuard在线说明手册
  2. 位于sdk中的目录: sdk/tools/proguard
  3. Android 混淆代码总结
  4. Android 代码混淆 选项说明
  5. 使用proguard混淆android代码

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