实现Android项目代码混淆三步走战略：
一、修改工程下的project.properties文件如下：
# 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 edit
# "ant.properties", and override values to adapt the script to your
# project structure.
#
# To enable ProGuard to shrink and obfuscate your code, uncomment this (available properties: sdk.dir, user.home):
#proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt
# Project target.
target=android-10
proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt
其中最后一行为自行添加的 混淆脚本路径，具体脚本编写在 proguard-project.txt 脚本文件内进行。
二、修改脚本文件
为什么说事修改呢？ 很简单因为Google已经替我们完成了大部分功能，只需按自己需要增加规则就OK，我得 proguard-project.txt 文件如下：
# This is a configuration file for ProGuard.
# #manual/usage.html
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-verbose
# ignorewarnings
-ignorewarnings
# 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).
-dontoptimize
-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.
-keepattributes *Annotation*
-keep public class com.google.vending.licensing.ILicensingService
-keep public class com.android.vending.licensing.ILicensingService
# For native methods, see #native
-keepclasseswithmembernames class * {
native <methods>;
}
# keep setters in Views so that animations can still work.
# see #beans
-keepclassmembers public class * extends android.view.View {
void set*(***);
*** get*();
}
# We want to keep methods in Activity that could be used in the XML attribute onClick
-keepclassmembers class * extends android.app.Activity {
public void *(android.view.View);
}
# For enumeration classes, see #enumerations
-keepclassmembers enum * {
public static **[] values();
public static ** valueOf(java.lang.String);
}
-keep class * implements android.os.Parcelable {
public static final android.os.Parcelable$Creator *;
}
-keepclassmembers class **.R$* {
public static <fields>;
}
# 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.
-dontwarn android.support.**
# -keep class android.support.v4.**{*;}
-keep class org.phprpc.**{*;}
-keep class com.google.gson.**{*;}
-keep class com.baidu.**{*;}
-keep class com.novell.sasl.client.**{*;}
-keep class org.**{*;}
-keep class com.hp.hpl.**{*;}
-keep class net.sourceforge.**{*;}
-keep class pinyindb.**{*;}
-keep class demo.**{*;}
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