android混淆(Obfuscate)

android混淆(Obfuscate)

《Obfuscate an Android application》 这篇文章的作者介绍了如何在Android平台下混淆程序，并且给出ant的build.xml文件，经过自己的测试，发现里面少了一些target项，在Eclips会出错，后来结合zxing开源项目的build.xml文件，终于混淆成功，项目包减少了不少。

 

这里主要提一些注意事项，不提供源代码

1、创建build.xml文件

 直接在项目的目录下新建一个名为build.xml的文件

 

 

2、创建Ant打包方式

项目 –> properties –> builders –> new –> ant builder

 

 

接着Buildfile选择项目build.xml文件，Base Dir选择项目目录就行了，记得勾上你的builders

 

 

 

3、build.xml文件修改

zxing这个文件没有加入混淆包选项，所以得做一些修改，如下示例

 

Xml代码

1. <property name="proguard-home" value="D://Program Files//proguard4.2//lib//"/>  
2.   
3.     <target name="optimize" depends="compile">  
4.         <jar basedir="${outdir-classes}" destfile="temp.jar"/>  
5.         <java jar="${proguard-home}/proguard.jar" fork="true" failonerror="true">  
6.             <jvmarg value="-Dmaximum.inlined.code.length=32"/>  
7.             <arg value="-injars temp.jar"/>  
8.             <arg value="-outjars optimized.jar"/>  
9.             <arg value="-libraryjars ${android-jar}"/>  
10.             <!-- <arg value="-libraryjars ${library-jar}/some_lib_used.jar"/> -->  
11.             <arg value="-dontpreverify"/>  
12.             <arg value="-dontoptimize"/>  
13.             <arg value="-dontusemixedcaseclassnames"/>  
14.             <arg value="-repackageclasses ''"/>  
15.             <arg value="-allowaccessmodification"/>  
16.             <arg value="-keep public class com.iwidsets.WidsetsActivity"/>  
17.             <!-- <arg value="-keep public class com.just2me.obfapp.receiver.*"/> -->  
18.             <arg value="-optimizationpasses 7"/>  
19.             <arg value="-verbose"/>  
20.             <arg value="-dontskipnonpubliclibraryclasses"/>  
21.             <arg value="-dontskipnonpubliclibraryclassmembers"/>  
22.         </java>  
23.         <delete file="temp.jar"/>  
24.         <delete dir="${outdir-classes}"/>  
25.         <mkdir dir="${outdir-classes}"/>  
26.         <unzip src="optimized.jar" dest="${outdir-classes}"/>  
27.         <delete file="optimized.jar"/>  
28.     </target>  

<property name="proguard-home" value="D://Program Files//proguard4.2//lib//"/><target name="optimize" depends="compile"><jar basedir="${outdir-classes}" destfile="temp.jar"/><java jar="${proguard-home}/proguard.jar" fork="true" failonerror="true"><jvmarg value="-Dmaximum.inlined.code.length=32"/><arg value="-injars temp.jar"/><arg value="-outjars optimized.jar"/><arg value="-libraryjars ${android-jar}"/><!-- <arg value="-libraryjars ${library-jar}/some_lib_used.jar"/> --><arg value="-dontpreverify"/><arg value="-dontoptimize"/><arg value="-dontusemixedcaseclassnames"/><arg value="-repackageclasses ''"/><arg value="-allowaccessmodification"/><arg value="-keep public class com.iwidsets.WidsetsActivity"/><!-- <arg value="-keep public class com.just2me.obfapp.receiver.*"/> --><arg value="-optimizationpasses 7"/><arg value="-verbose"/><arg value="-dontskipnonpubliclibraryclasses"/><arg value="-dontskipnonpubliclibraryclassmembers"/></java><delete file="temp.jar"/><delete dir="${outdir-classes}"/><mkdir dir="${outdir-classes}"/><unzip src="optimized.jar" dest="${outdir-classes}"/><delete file="optimized.jar"/></target>

 

注意：keep public class com.iwidsets.WidsetsActivity需改成你的主Activity

 

 并修改target dex

 

Xml代码

1. <!-- Convert this project's .class files into .dex files. -->  
2. <target name="dex" depends="compile,optimize">  
3.     <echo>Converting compiled files and external libraries into ${out-folder}/${dex-file}...</echo>  
4.     <apply executable="${dx}" failonerror="true" parallel="true">  
5.         <arg value="--dex" />  
6.         <arg value="--output=${intermediate-dex-location}" />  
7.         <arg path="${outdir-classes-location}" />  
8.         <fileset dir="${external-libs-folder}" includes="*.jar"/>  
9.     </apply>  
10. </target>  

<!-- Convert this project's .class files into .dex files. --><target name="dex" depends="compile,optimize"><echo>Converting compiled files and external libraries into ${out-folder}/${dex-file}...</echo><apply executable="${dx}" failonerror="true" parallel="true"><arg value="--dex" /><arg value="--output=${intermediate-dex-location}" /><arg path="${outdir-classes-location}" /><fileset dir="${external-libs-folder}" includes="*.jar"/></apply></target>