android代碼的混淆

代碼的混淆
好處：
1 防止反編譯  
2 可以壓縮代碼大小 
如果需要對項目進行全局混碼，只需要進行一步操作：
將project.properties的中
“#  proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt”的“#”去掉就可以

project.properties

# 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-19

如果有一些代碼不能被混淆，比如需要加入了so文件，需要調用裏面的方法，
那麼調用JNI訪問so文件的方法就不能被混碼。在導出的時候，可能不會報錯。
但是在手機上運行的時候，需要調用so文件的時候，就會報某某方法無法找到。
這個時候就需要用到proguard-project.txt。

在老版本中，創建項目的時候，會給出proguard.cfg，但是在的新版中創建項目則不會有任何提示。
這個時候需要只要將proguard.cfg的內容加入到proguard-project.txt中，
再根據自己的需要進行編輯即可。

proguard-project.txt

# 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:
-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 <methods>;
}

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

-keepclasseswithmembers class * {
    public <init>(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 *;
}
-keep class MD5

# 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 *;
#}

/**
配置解釋


*/


-optimizationpasses 5   壓縮的級別
-dontusemixedcaseclassnames   Ab  Fe    A      a  adb  adc 不使用大小寫混合
-dontskipnonpubliclibraryclasses  三方.jar  
-dontpreverify  要不要使用預校驗
-verbose   在混淆的時候是否記錄日誌
-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*   壓縮的算法  


保持那些類不被混淆  四大組件都不能被混淆
-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 <methods>;   jni  java nativew interface 
}




自定義控件也不能被混淆
-keepclasseswithmembers class * {
    public <init>(android.content.Context, android.util.AttributeSet);
}


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


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


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


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


-keep class MD5