在2.3版本的sdk中可以看到在ANDROID_SDK _PATH/tools/下面多了一个proguard文件夹,google把proguard技术放在了android sdk里面,现在已经可以通过正常的编译方式实现代码混淆了。
在2.3版本以后,无论开发用的是哪一个版本的SDK,新建一个工程里面都会有default.properties和proguard.cfg两个文件。(http://www.my400800.cn )
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
默认的proguard.cfg中也已经有了混淆代码的脚本:
-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:
详细信息参考<proguard_path>/examples中的例子及注释。
依据官方文档所说:
To enable ProGuard so that it runs as part of an Ant or Eclipse build, set the proguard.config property in the <project_root>/default.properties file. The path can be an absolute path or a path relative to the project's root.
修改default.properties文件,加上一句:
proguard.config=proguard.cfg
加完后如下面的样子:
proguard.config=proguard.cfg # 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
然后正常的编译签名即可生成一个经过代码混淆的apk。
如果编译出现警告可以在【proguard.cfg】文件中添加【-ignorewarnings】忽略警告项目进行混淆处理。
如果运行上面的代码出现错误请下载 proguard4.6.rar解压后把目录下面的 lib 目录中的文件复制到 【androidsdk的Developer目录下的lib目录下面就可以了】