《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。
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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
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2、创建Ant打包方式
项目 –> properties –> builders –> new –> ant builder
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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
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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
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- <property?name="proguard-home"?value="D:\\Program?Files\\proguard4.2\\lib\\"/>??
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- ????<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="${outdir-classes}"/>??
- ????????<delete?file="optimized.jar"/>??
- ????</target>??
<property name="proguard-home" value="D:\\Program Files\\proguard4.2\\lib\\"/> <target name="optimize" depends="compile"> <jar basedir="${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>
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注意:keep public class com.iwidsets.WidsetsActivity需改成你的主Activity
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?并修改target dex
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- <!--?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>??