2017 May 27 Android

Android-SDK默认混淆配置ProGuard

一.介绍

通常情况下编译后的字节码包含了大量调试信息(如源类名/行号等)
混淆代码就能删除这些调试信息，并用无意义字符替换所有名字，增加反编译难度！

ProGuard是一个混淆Java代码的开源项目，主要作用如下：
	混淆Obfuscate 用无意义字符替换类名/字段名/属性名/方法名等
	压缩Shrink 移除无用类/字段/属性/方法
	优化Optimize 移除无用字节码指令
	预检preverify 预检字节码,确保可执行

二.混淆配置

在Android studio/build.gradle中
android {
	...
	buildTypes {
		release {
			//开启混淆/压缩
			minifyEnabled true

			//proguard-android.txt是Android SDK默认混淆配置文件，
			//proguard-rules.pro是我们自定义混淆配置文件
			proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
		}
	}
}	

1.自定义混淆文件proguard-rules.pro

#基本指令----------------------------------
-printmapping proguardMapping.txt #输出混淆前后代码映射关系
-keepattributes Signature #保留泛型
# -renamesourcefileattribute XXX.java #崩溃抛出异常时,源码文件名自定义
-keepattributes SourceFile, LineNumberTable #崩溃抛出异常时,保留源码文件名和源码行号
 
#移除log代码
#确保没有开启--dontoptimize选项
#默认混淆文件不要用proguard-android.txt,应该用proguard-android-optimize.txt
#assume no side effects假定无效, 标识无效代码
-assumenosideeffects class android.util.Log {
	public static int v(...);
	public static int d(...);
	public static int i(...);
}

2.Android SDK默认混淆文件proguard-android.txt

AndroidSDK\tools\proguard\proguard-android.txt
                         \proguard-android-optimize.txt							 
其中proguard-android是不开启优化的配置文件
    proguard-android-optimize.tx是开启优化的配置文件

#1.在proguard-android-optimize.txt中——————————————————————————————
#开启优化
-optimizations !code/simplification/arithmetic,!code/simplification/cast,!field/*,!class/merging/*
-optimizationpasses 5
-allowaccessmodification

......剩下部分同proguard-android.txt

#2.在proguard-android.txt中———————————————————————————————————————
#不开启优化, 会导致-assumenosideeffects无法去除log代码
#如果要用-assumenosideeffects去除log代码,默认混淆文件应该选proguard-android-optimize.txt
-dontoptimize 

-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-verbose
-dontpreverify
-keepattributes *Annotation* #注解

-keep public class com.google.vending.licensing.ILicensingService
-keep public class com.android.vending.licensing.ILicensingService

-keepclasseswithmembernames class * {
	native <methods>;
}

-keepclassmembers public class * extends android.view.View {
   void set*(***);
   *** get*();
}

-keepclassmembers class * extends android.app.Activity {
   public void *(android.view.View);
}

-keepclassmembers enum * {
	public static **[] values();
	public static ** valueOf(java.lang.String);
}

-keepclassmembers class * implements android.os.Parcelable {
  public static final android.os.Parcelable$Creator CREATOR;
}

-keepclassmembers class **.R$* {
	public static <fields>;
}

-dontwarn android.support.**

-keep class android.support.annotation.Keep

-keep @android.support.annotation.Keep class * {*;}

-keepclasseswithmembers class * {
	@android.support.annotation.Keep <methods>;
}

-keepclasseswithmembers class * {
	@android.support.annotation.Keep <fields>;
}

-keepclasseswithmembers class * {
	@android.support.annotation.Keep <init>(...);
}

简书: http://www.jianshu.com/p/c667764f1f3a
CSDN博客: http://blog.csdn.net/qq_32115439/article/details/72785344
GitHub博客：http://lioil.win/2017/05/27/Android_ProGuard.html
Coding博客：http://c.lioil.win/2017/02/27/Android_ProGuard.html