android 的混淆打包

混淆：類名和方法名的映射轉化關係    優點：減小代碼大小，提高效率
在project.properties文件中寫入：proguard.config=proguard.cfg


混淆的原理-> 類名和方法名的映射轉化
ContentProvider.getuserinfo.getchineselikemeetmale();
a.b.c();


native -> 類名_方法名


proguard.cfg文件：
-optimizationpasses 5  設置混淆的壓縮比率 0 ~ 7 
-dontusemixedcaseclassnames -> Aa aA 是否保留大小寫
-dontskipnonpubliclibraryclasses ->如果應用程序引入的有jar包,並且想混淆jar包裏面的class 
-dontpreverify 
-verbose ->混淆後生產映射文件 map 類名->轉化後類名的映射


-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*
#混淆採用的算法.


-keep public class * extends android.app.Activity 所有activity的子類不要去混淆 
-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>;    所有native的方法不能去混淆. 
}


-keepclasseswithmembers class * {
    public <init>(android.content.Context, android.util.AttributeSet);
    //某些構造方法
}


-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 *;
}