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
# 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
-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。
所以我们修改default.properties file
proguard.config=proguard.cfg
如下
# 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 proguard.config=proguard.cfg
正常编译签名即可
主要摘自http://www.pin5i.com/showtopic-android-2.3-code-obfuscation-proguard.html