android 代码混淆
1 proguard.cfg，这就是混淆所需的proguard脚本啊。
其代码如下：
view plain-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。
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中的例子及注释。)
2 在工程的"default.properties"中添加这样一句话“proguard.config=proguard.cfg”
打包签名后的.apk就是混淆的，其实我们只要做一步就可以了就是在"default.properties"中添加这样一句话“proguard.config=proguard.cfg”就可以了。
出现错误：
[INFO] Warning: there were 294 unresolved references to classes or interfaces.
[INFO] You may need to specify additional library jars (using '-library
jars').
[INFO] Warning: there were 3 unresolved references to program class members.
You should consider explicitly keeping the mentioned class members
(using '-keep' or '-keepclassmembers').
[INFO] Your input classes appear to be inconsistent.
[INFO] You may need to recompile them and try again.
[INFO] Alternatively, you may have to specify the option
[INFO] '-dontskipnonpubliclibraryclassmembers'.
[INFO] java.io.IOException: Please correct the above warnings first.
[INFO] at proguard.Initializer.execute(Initializer.java:321)
[INFO] at proguard.ProGuard.initialize(ProGuard.java:211)
[INFO] at proguard.ProGuard.execute(ProGuard.java:86)
[INFO] at proguard.ProGuard.main(ProGuard.java:492)
解决方法如下：解决方法找到了，在proguard.cfg文件中加入-ignorewarnings就可以跳过这个错误了。
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