Progurd詳解

一、理論知識  
ProGuard是一款免費的Java類文件壓縮器、優化器和混淆器。它能發現並刪除無用類、字段（field）、方法和屬性值（attribute）。它也能優化字節碼並刪除無用的指令。最後，它使用簡單無意義的名字來重命名你的類名、字段名和方法名。經過以上操作的jar文件會變得更小，並很難進行逆向工程。
二、基本使用
  在Android應用程序也可以使用ProGuard來進行混洗打包，大大的優化Apk包的大小。但是注意ProGuard對文件路徑的名名很有講究，不支持括號，也不支持空格。在混淆過後，可以在工程目錄的proguard中的mapping.txt看到混淆後的類名，方法名，變量名和混淆前的類名，方法名，變量名。
   在使用Eclipse或Ant打包應用程序時，都是使用Android工程目錄的project.properties文件來指定配置。關於Android中如何使用ant打包請參考《Android中使用Ant編譯打包》
在使用Eclipse新建一個工程，都會在工程目錄下生產配置project.properties和proguard-project.tx。
文件如下所示：
例1
# To enable ProGuard to shrink and obfuscate your code, uncomment this (available properties: sdk.dir, user.home):
#proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt


# Project target.
target=android-10
project.properties用於配置Android工程的一些屬性，#號的話表示當前行是註釋，這裏的proguard.config就用於指定ProGuard的混淆配置文件，並對使用release方式打包應用程序時開啓代碼混淆功能。對於是否是使用release方式打包，和AndroidManifest.xml中application的android:debuggable屬性有很多關係。如果該值爲android:debuggable="true"，那麼最終就是debug方式打包。最明智的方式就是在AndroidManifest.xml並不顯示的指定它，而是是打包工具在打包時來決定它最終的值。對於ant就是ant release或ant debug。而對於直接在Eclipse中使用run 或debgu來打包的話就是debug,使用export的話就是release.
proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt


這裏的話指定了混淆的基本配置文件proguard-android.txt，和混淆的個性化配置文件proguard-project.txt。這裏proguard-project.txt文件用於對前面的基本的混淆配置文件proguard-android.txt的配置進行override和添加。
混淆的基本配置文件proguard-android.txt如下：
文件1
# This is a configuration file for ProGuard.
# http://proguard.sourceforge.net/index.html#manual/usage.html


-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-verbose


# Optimization is turned off by default. Dex does not like code run
# through the ProGuard optimize and preverify steps (and performs some
# of these optimizations on its own).
-dontoptimize
-dontpreverify
# Note that if you want to enable optimization, you cannot just
# include optimization flags in your own project configuration file;
# instead you will need to point to the
# "proguard-android-optimize.txt" file instead of this one from your
# project.properties file.


-keepattributes *Annotation*
-keep public class com.google.vending.licensing.ILicensingService
-keep public class com.android.vending.licensing.ILicensingService


# For native methods, see http://proguard.sourceforge.net/manual/examples.html#native
-keepclasseswithmembernames class * {
    native <methods>;
}


# keep setters in Views so that animations can still work.
# see http://proguard.sourceforge.net/manual/examples.html#beans
-keepclassmembers public class * extends android.view.View {
   void set*(***);
   *** get*();
}


# We want to keep methods in Activity that could be used in the XML attribute onClick
-keepclassmembers class * extends android.app.Activity {
   public void *(android.view.View);
}


# For enumeration classes, see http://proguard.sourceforge.net/manual/examples.html#enumerations
-keepclassmembers enum * {
    public static **[] values();
    public static ** valueOf(java.lang.String);
}


-keep class * implements android.os.Parcelable {
  public static final android.os.Parcelable$Creator *;
}

#指定某些成員變量不被混淆
-keepclassmembers class **.R$* {
    public static <fields>;
}


# The support library contains references to newer platform versions.
# Don't warn about those in case this app is linking against an older
# platform version.  We know about them, and they are safe.
-dontwarn android.support.**


以下則個是我們項目混淆的個性化配置文件proguard-project.txt
# 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 *;
#}


-renamesourcefileattribute SourceFile
-keepattributes SourceFile,LineNumberTable
-dontwarn android.**
-dontwarn edu.edut.lsf.payment.link.**
-libraryjars ..\Download_Install\lib\classes.jar


-keep class org.jboss.netty.util.internal.AtomicFieldUpdaterUtil
-keep class org.jboss.netty.util.internal.AtomicFieldUpdaterUtil$Node
-keep class org.jboss.netty.util.internal.LinkedTransferQueue$Node
-keep class edu.edut.robin.activities.LeWebJsActivity$AppStoreInterface
-keepclasseswithmembers class * {
    public static void main(java.lang.String[]);
}
-keepclasseswithmembers class org.jboss.netty.util.internal.AtomicFieldUpdaterUtil$Node {
    *;
}


-keepclasseswithmembers class edu.edut.robin.activities.LeWebActionActivity$AppstoreWebInterface {
    *;
}
-keepclasseswithmembers class edu.edut.robin.utils.SilentInstallAssistant$* {
    *;
}
-keepclasseswithmembers class edu.edut.robin.silentinstaller.utils.SilentInstallAssistant$* {
    *;
}
-keepclasseswithmembers class edu.edut.robin.utils.Pm$* {
    *;
}
-keepclasseswithmembers class org.jboss.netty.util.internal.LinkedTransferQueue {
    volatile transient org.jboss.netty.util.internal.LinkedTransferQueue$Node head;
    volatile transient org.jboss.netty.util.internal.LinkedTransferQueue$Node tail;
    volatile transient int sweepVotes;


}
-keepclasseswithmembers class org.jboss.netty.util.internal.LinkedTransferQueue$Node {
    *;
}
-keepclasseswithmembers class edu.edut.robin.activities.LeWebJsActivity$AppStoreInterface {
    *;
}
-keepclasseswithmembers class * extends edu.edut.lsf.payment.WebSubmitInterface {
    *;
}
-keepclasseswithmembers class edu.edut.lsf.payment.WebSubmitInterface {
    *;
}
-keep public class com.unionpay.** {*; }
-keep public class edu.edut.lsf.** {*; }


注：由於牽扯到保密的問題，一些關於項目的東西換成了edu.edut或edu.edut.robin
三、混淆配置詳解
另外以下是關於混淆配置文件的一些說明：
-renamesourcefileattribute SourceFile
-keepattributes SourceFile,LineNumberTable 保留原代碼的行號信息
-injars  androidtest.jar【jar包所在地址】 
-outjars  out【輸出地址】
-libraryjars    'D:\android-sdk-windows\platforms\android-9\android.jar' 【引用的庫的jar，用於解析injars所指定的jar類】
 
-optimizationpasses 5
-dontusemixedcaseclassnames 【混淆時不會產生形形色色的類名 】puzzle
-dontskipnonpubliclibraryclasses 【指定不去忽略非公共的庫類。 】 puzzle
-dontpreverify 【不預校驗】
-verbose
-optimizations !code/simplification/arithmetic,!field/*,!class/merging/* 【優化】puzzle
-keep public class * extends android.app.Activity　　【不進行混淆類名的類，保持其原類名和包名】


-keep public abstract interface com.asqw.android.Listener{
public protected <methods>;  【所有public protected的方法名不進行混淆】
}
-keep public class com.asqw.android{
public void Start(java.lang.String); 【對該方法不進行混淆】
}
-keepclasseswithmembernames class * { 【對所有類的native方法名不進行混淆】
native <methods>;
}
-keepclasseswithmembers class * { 【對所有類的指定方法的方法名不進行混淆】
public <init>(android.content.Context, android.util.AttributeSet);
}
-keepclassmembers class * extends android.app.Activity {【對所有類的指定方法的方法名不進行混淆】
public void *(android.view.View);
}
-keepclassmembers enum * {【對枚舉類型enum的所有類的以下指定方法的方法名不進行混淆】
public static **[] values();
public static ** valueOf(java.lang.String);
}
-keep class * implements android.os.Parcelable {【對實現了Parcelable接口的所有類的類名不進行混淆，對其成員變量爲Parcelable$Creator類型的成員變量的變量名不進行混淆】
public static final android.os.Parcelable$Creator *;
}
-keepclasseswithmembers class org.jboss.netty.util.internal.LinkedTransferQueue {【對指定類的指定變量的變量名不進行混淆】 volatile transient org.jboss.netty.util.internal.LinkedTransferQueue$Node head; volatile transient org.jboss.netty.util.internal.LinkedTransferQueue$Node tail; volatile transient int sweepVotes;}
-keep public class com.unionpay.** {*; }【對com.unionpay包下所有的類都不進行混淆，即不混淆類名，也不混淆方法名和變量名】