Android代码混淆

代码混淆步骤：

1，project.properties中打开代码混淆功能proguard.config=proguard.cfg

2，编辑proguard.cfg文件，内容如下

-optimizationpasses 5-dontusemixedcaseclassnames-dontskipnonpubliclibraryclasses-dontpreverify-verbose-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*-ignorewarnings-libraryjars libs/android-support-v4.jar-dontwarn android.support.v4.**    -keep class android.support.v4.** { *; }  -keep interface android.support.v4.app.** { *; }  -keep public class * extends android.support.v4.**  -keep public class * extends android.app.Fragment-libraryjars libs/asmack.jar-libraryjars libs/aws-android-sdk-1.7.1.1-core.jar-libraryjars libs/aws-android-sdk-1.7.1.1-s3.jar-libraryjars libs/LibFrameWidget.jar-libraryjars libs/LibFramework.jar-libraryjars libs/locSDK_4.0.jar-libraryjars libs/umeng_sdk.jar-libraryjars libs/zxing-core.jar-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 com.android.vending.licensing.ILicensingService-keepclasseswithmembernames class * {    native <methods>;}-keepclasseswithmembernames class * {    public <init>(android.content.Context, android.util.AttributeSet);}-keepclasseswithmembernames class * {    public <init>(android.content.Context, android.util.AttributeSet, int);}-keepclassmembers enum * {    public static **[] values();    public static ** valueOf(java.lang.String);}-keep class * implements android.os.Parcelable {  public static final android.os.Parcelable$Creator *;}

应该注意的地方如下：

1，android-support-v4.jar报错的话，要加上下面的代码

-ignorewarnings

-dontwarn android.support.v4.**    
-keep class android.support.v4.** { *; }  
-keep interface android.support.v4.app.** { *; }  
-keep public class * extends android.support.v4.**  
-keep public class * extends android.app.Fragment

2，所有的*.jar包都要加上

-libraryjars libs/*.jar

3，混淆代码除了可以更安全还有一个好处是：你的APK文件变得更小，大概为混淆之前的1/2吧。