Android 2.3 代码混淆proguard技术.docxVIP

由于各种反编译工具的泛滥，作为Android程序员在2.3版本以前只能通过手动添加proguard来实现代码混淆proguard这个工具是一个java代码混淆的工具在2.3版本的sdk中 我们可以看到在android-sdk-windows\tools\下面多了一个proguard文件夹google已经把proguard技术放在了android sdk里面 可以通过正常的编译方式也能实现代码混淆了可以看见新建一个工程里面有default.properties和proguard.cfg默认的default.properties代码如下view plaincopy to clipboardprint?#?This?file?is?automatically?generated?by?Android?Tools.??#?Do?not?modify?this?file?--?YOUR?CHANGES?WILL?BE?ERASED!??#??#?This?file?must?be?checked?in?Version?Control?Systems.??#??#?To?customize?properties?used?by?the?Ant?build?system?use,??#?build.properties,?and?override?values?to?adapt?the?script?to?your??#?project?structure.??#?Project?target.??target=android-9???我们可以看到proguard.cfg已经帮我们写好了优化代码脚本view plaincopy to clipboardprint?-optimizationpasses?5??-dontusemixedcaseclassnames??-dontskipnonpubliclibraryclasses??-dontpreverify??-verbose??-optimizations?!code/simplification/arithmetic,!field/*,!class/merging/*??-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?com.android.vending.licensing.ILicensingService??-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);??}??-keepclassmembers?enum?*?{??????public?static?**[]?values();??????public?static?**?valueOf(java.lang.String);??}??-keep?class?*?implements?android.os.Parcelable?{????public?static?final?android.os.Parcelable$Creator?*;??}???从脚本中可以看到，混淆中保留了继承自Activity、Service、Application、BroadcastReceiver、 ContentProvider等基本组件以及com.android.vending.licensing.ILicensingService并保留了所有的Native变量名及类名，所有类中部分以设定了固定参数格式的构造函数，枚举等等。(详细信息请参考proguard_path\examples