如何实现AndroidStudio（简称AS），代码混淆：操作很简单：
第一步：
在build.grandle,的以下位置进行修改：
buildTypes { release { minifyEnabled true //minifyEnabled true 之前为false,修改为true proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' }}
第二步：
在proguard-rules.pro中加入以下代码，基本可以涵盖所有：
# Add project specific ProGuard rules here.# By default, the flags in this file are appended to flags specified# in C:\Users\Administrator\AppData\Local\Android\sdk/tools/proguard/proguard-android.txt# You can edit the include path and order by changing the proguardFiles# directive in build.gradle.## 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 *;#}#指定代码的压缩级别-optimizationpasses 5#包明不混合大小写-dontusemixedcaseclassnames#不去忽略非公共的库类-dontskipnonpubliclibraryclasses #优化 不优化输入的类文件-dontoptimize #预校验-dontpreverify #混淆时是否记录日志-verbose # 混淆时所采用的算法-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*#保护注解-keepattributes *Annotation*# 保持哪些类不被混淆-keep public class * extends android.app.Fragment-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#如果有引用v4包可以添加下面这行-keep public class * extends android.support.v4.app.Fragment#忽略警告-ignorewarning#####################记录生成的日志数据,gradle build时在本项目根目录输出#################apk 包内所有 class 的内部结构-dump class_files.txt#未混淆的类和成员-printseeds seeds.txt#列出从 apk 中删除的代码-printusage unused.txt#混淆前后的映射-printmapping mapping.txt#####################记录生成的日志数据，gradle build时 在本项目根目录输出-end################################混淆保护自己项目的部分代码以及引用的第三方jar包library##########################-libraryjars libs/umeng-analytics-v5.2.4.jar#-libraryjars libs/alipaysdk.jar#-libraryjars libs/alipaysecsdk.jar#-libraryjars libs/alipayutdid.jar#-libraryjars libs/wup-1.0.0-SNAPSHOT.jar#-libraryjars libs/weibosdkcore.jar#三星应用市场需要添加:sdk-v1.0.0.jar,look-v1.0.1.jar#-libraryjars libs/sdk-v1.0.0.jar#-libraryjars libs/look-v1.0.1.jar#我是以libaray的形式引用了一个图片加载框架,如果不想混淆 keep 掉-keep class com.nostra13.universalimageloader.** { *; }#友盟-keep class com.umeng.**{*;}#百度-keep class com.baidu.**{*;}#自己项目特殊处理代码#忽略警告-dontwarn net.sfox.mastart.remember.**#保留一个完整的包-keep class net.sfox.mastart.remember.** { *; }#如果引用了v4或者v7包-dontwarn android.support.**############混淆保护自己项目的部分代码以及引用的第三方jar包library-end##################-keep public class * extends android.view.View { public (android.content.Context); public (android.content.Context, android.util.AttributeSet); public (android.content.Context, android.util.AttributeSet, int); public void set*(...);}#保持 native 方法不被混淆-keepclasseswithmembernames class * { native ;}#保持自定义控件类不被混淆-keepclasseswithmembers class * { public (android.content.Context, android.util.AttributeSet);}#保持自定义控件类不被混淆-keepclasseswithmembers class * { public (android.content.Context, android.util.AttributeSet, int);}#保持自定义控件类不被混淆-keepclassmembers class * extends android.app.Activity { public void *(android.view.View);}#保持 Parcelable 不被混淆-keep class * implements android.os.Parcelable { public static final android.os.Parcelable$Creator *;}#保持 Serializable 不被混淆-keepnames class * implements java.io.Serializable#保持枚举 enum 类不被混淆 如果混淆报错，建议直接使用上面的 -keepclassmembers class * implements java.io.Serializable即可#-keepclassmembers enum * {# public static **[] values();# public static ** valueOf(java.lang.String);#}-keepclassmembers class * { public void *ButtonClicked(android.view.View);}#不混淆资源类-keepclassmembers class **.R$* { public static ;}#避免混淆泛型 如果混淆报错建议关掉#–keepattributes Signature#移除log 测试了下没有用还是建议自己定义一个开关控制是否输出日志#-assumenosideeffects class android.util.Log {# public static boolean isLoggable(java.lang.String, int);# public static int v(...);# public static int i(...);# public static int w(...);# public static int d(...);# public static int e(...);#}
注：
当你自己不太熟悉AS的那些需要混淆，那些不需要，添加这个代码就可以，当运行出错时，你自己觉得没什么大问题，就把，出错的类，不混淆了。