Android之——代碼混淆

Android自身可以實現代碼的混淆功能，Android集成了代碼混淆的功能，這些功能在Android SDK的tools有個proguard目錄，這個目錄下就是提供了Andoid代碼的混淆功能，我們只需要在Android項目中進行簡單的配置即可。最初的配置文件為proguard.cfg文件，後來adt升級以後，文件改為了proguard-project.txt，所以，這裡，我們以兩種方式來講解如何進行代碼混淆

方式一、配置文件為proguard.cfg

1、proguard.cfg文件

創建Android項目之後，在Android項目根目錄下有個proguard.cfg文件，這個文件中就是描述了Android的混淆配置。

具體如下:

-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 * extends android.app.backup.BackupAgentHelper
-keep public class * extends android.preference.Preference
-keep public class com.android.vending.licensing.ILicensingService

-keepclasseswithmembernames class * {
    native ;
}

-keepclasseswithmembers class * {
    public (android.content.Context, android.util.AttributeSet);
}

-keepclasseswithmembers class * {
    public (android.content.Context, android.util.AttributeSet, int);
}

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

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

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

2、project.properties文件

這個文件是整個項目的環境配置文件，我們只需要在這個文件中指定代碼混淆的配置即可。只需要在代碼中加入一行配置

proguard.config=proguard.cfg

這樣就實現了代碼的混淆功能

方式二、配置文件為proguard-project.txt

1、proguard-project.txt文件

這個時候，項目生成的是proguard-project.txt

如下代碼所示:

# To enable ProGuard in your project, edit project.properties
# to define the proguard.config property as described in that file.
#
# Add project specific ProGuard rules here.
# By default, the flags in this file are appended to flags specified
# in ${sdk.dir}/tools/proguard/proguard-android.txt
# You can edit the include path and order by changing the ProGuard
# include property in project.properties.
#
# For more details, see
#   http://developer.android.com/guide/developing/tools/proguard.html

# Add any project specific keep options here:

# If your project uses WebView with JS, uncomment the following
# and specify the fully qualified class name to the JavaScript interface
# class:
#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
#   public *;
#}

2、project.properties

在這個文件中需要我們指定sdk的安裝路徑sdk.dir，然後再指定proguard的配置proguard.config，我自己sdk的目錄是E:androidadt-bundle-windows-x86_64-20131030sdk，

所以，我在project.properties文件中新增的兩項配置是

sdk.dir=E:androidadt-bundle-windows-x86_64-20131030sdk
proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt

好了，這樣就完成了代碼混淆的配置

總結：

兩種方式都只是通過配置project.properties文件實現代碼混淆的。