android 代码混淆

参考上图：

1.buildTypes -> minifyEnabled = true

2.添加如下代码

task makeJar(type: Copy) {

delete 'build/libs/myjar.jar' //删除存在的

from('build/intermediates/aar_main_jar/release/') //设置拷贝的文件

into('build/libs/') //打进jar包后的文件目录

include('classes.jar')//将classes.jar放入build/libs/目录下 //include ,exclude参数来设置过滤

//（我们只关心classes.jar这个文件）

rename ('classes.jar', 'myjar.jar') //重命名

}

makeJar.dependsOn(build)

3.proguard-android.txt说明

学习自定义proguard-rules.pro之前，我们先来看看系统默认的代码混淆规则proguard-android.txt文件。假如proguard-rules.pro文件没用配置任何混淆规则，系统将以proguard-android.txt里的规则为准开启混淆

#混淆时不使用大小写混合类名

-dontusemixedcaseclassnames

#不跳过library中非public的类

-dontskipnonpubliclibraryclasses

#打印混淆的详细信息-verbose

# Optimization is turned off by default. Dex does not like code run# through the ProGuard optimize and preverify steps (and performs some# of these optimizations on its own).

#不进行优化

-dontoptimize

#不进行预校验，能加快混淆速度

-dontpreverify# Note that if you want to enable optimization, you cannot just# include optimization flags in your own project configuration file;

# instead you will need to point to the

# "proguard-android-optimize.txt" file instead of this one from your# project.properties file.

#不混淆注解中的参数-keepattributes *Annotation*

#不混淆特定的类-keep public classcom.google.vending.licensing.ILicensingService-keep public classcom.android.vending.licensing.ILicensingService

# For native methods, see http://proguard.sourceforge.net/manual/examples.html

#native#不混淆包含native方法的类和native方法

-keepclasseswithmembernames class * { native ;}

# keep setters in Views so that animations can still work.

# see http://proguard.sourceforge.net/manual/examples.html#beans

#不混淆继承View类的getXX()和setXX()方法以保证属性动画正常运行。

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

# We want to keep methods in Activity that could be used in the XML attribute onClick

#不混淆Activity中public void修饰的含有View参数的方法以保证在xml配置的onclick正常使用-keepclassmembers class * extends android.app.Activity{ public void *(android.view.View);}

# For enumeration classes, see http://proguard.sourceforge.net/manual/examples.html#enumerations

#不混淆枚举类的values()和valueOf()方法

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

#不混淆实现Parcelable接口的类的CREATOR成员

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

#不混淆R文件的所有public类成员，如android.R类

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

# The support library contains references to newer platform versions.# Don't warn about those in case this app is linking against an older

# platform version. We know about them, and they are safe.

#不对android.support包下的代码警告。例如，app使用了低于某些类的support包版本导致出现警告问题。

-dontwarn android.support.**# Understand the @Keep support annotation.

#不混淆Keep注解-keep class android.support.annotation.Keep

#不混淆带Keep注解的类

-keep @android.support.annotation.Keepclass * {*;}

#如果类的方法使用了Keep注解，不混淆类与类方法

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

#如果类的属性使用了Keep注解，不混淆类与类成员

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

#如果类的构造方法使用了Keep注解，不混淆类与类成员

-keepclasseswithmembers class * { @android.support.annotation.Keep(...);}。