因为各类反编译工具的泛滥,做为Android程序员在2.3版本之前只能经过手动添加proguard来实现代码混淆 java
proguard这个工具是一个java代码混淆的工具 android
在2.3版本的sdk中 咱们能够看到在android-sdk-windows/tools/下面多了一个proguard文件夹 程序员
google已经把proguard技术放在了android sdk里面 能够经过正常的编译方式也能实现代码混淆了 windows
能够看见新建一个工程里面有default.properties和proguard.cfg app
默认的default.properties代码以下 ide
- # 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
咱们能够看到proguard.cfg已经帮咱们写好了优化代码脚本 函数
- -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 *;
- }
从脚本中能够看到,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 工具
并保留了全部的Native变量名及类名,全部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。) 优化
接下来 按照google帮助文档里说的 ui
- 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.
因此咱们修改default.properties file
加上一句
proguard.config=proguard.cfg
以下
- # 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
而后正常的编译签名便可
而后用Android Tools生成一个发布的apk便可
而后用反编译工具查看dex文件
最后导出反编译以后的混淆代码以下图
是否是很轻松加愉快!但愿各位程序员都能保护好本身的Android代码!