Android studio混淆

看了一篇关于Android studio混淆的文章http://blog.csdn.net/qq_23547831/article/details/51581491，感觉有必要总结一个简单的混淆版本设置，所以有了以下文章：

1.首先需要在app下的build.gradle下配置，true表示编译时会混淆代码

<span style="font-size:18px;">buildTypes {
        release {

            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }</span>

2.在proguard-rules.pro中配置，以下是基本配置

<span style="white-space:pre">        </span><pre name="code" class="html"><span style="white-space:pre">        </span>-dontshrink
            #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

             #不做预校验
            -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

            #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

            #如果不想混淆 keep 掉
            -keep class com.lippi.recorder.iirfilterdesigner.** {*; }
            #项目特殊处理代码

            #忽略警告
            -dontwarn com.lippi.recorder.utils**
            #保留一个完整的包
            -keep class com.lippi.recorder.utils.** {
                *;
             }

            -keep class  com.lippi.recorder.utils.AudioRecorder{*;}

            #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 <init>(android.content.Context);
                public <init>(android.content.Context, android.util.AttributeSet);
                public <init>(android.content.Context, android.util.AttributeSet, int);
                public void set*(...);
            }

            #保持 native 方法不被混淆
#            -keepclasseswithmembernames class * {
#                native <methods>;
#            }

            # Keep names - Native method names. Keep all native class/method names.
            -keepclasseswithmembers,allowshrinking class * {
                native <methods>;
            }

            #保持自定义控件类不被混淆
            -keepclasseswithmembers class * {
                public <init>(android.content.Context, android.util.AttributeSet);
            }

            #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 Serializable 不被混淆并且enum 类也不被混淆
            -keepclassmembers class * implements java.io.Serializable {
                static final long serialVersionUID;
                private static final java.io.ObjectStreamField[] serialPersistentFields;
                !static !transient <fields>;
                !private <fields>;
                !private <methods>;
                private void writeObject(java.io.ObjectOutputStream);
                private void readObject(java.io.ObjectInputStream);
                java.lang.Object writeReplace();
                java.lang.Object readResolve();
            }

            #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 <fields>;
            }

如果有H5交互页面配置如下

<span style="white-space:pre">    </span>    #不混淆H5交互
            -keepattributes *JavascriptInterface*

<span style="white-space:pre">    </span>    #ClassName是类名，H5_Object是与javascript相交互的object，建议以内部类形式书写
            -keepclassmembers   class **.ClassName$H5_Object{
                *;
            }

如果使用GSON，则添加如下配置

<span style="white-space:pre">    </span>   -keepattributes Signature
           
            -keepattributes *Annotation*<pre name="code" class="html"><span style="white-space:pre">    </span>    -keep class sun.misc.Unsafe { *; } 

<span style="white-space:pre">    </span>     #下面需要填写自己bean对象对应的包名，所以建议将使用Gson解析的都放在同一包下<pre name="code" class="html"><span style="white-space:pre">    </span>    -keep class com.dingyan.students.javabean.** { *; }

如果使用了其它的第三方包，则需要参照文档进行配置，否则会有莫名其妙的错误。

最后贴上我项目中实际的混淆方案：

# Glide图片库的混淆处理
-keep public class * implements com.bumptech.glide.module.GlideModule
-keep public enum com.bumptech.glide.load.resource.bitmap.ImageHeaderParser$** {
    **[] $VALUES;
    public *;
}

-optimizationpasses 5
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-dontpreverify
-verbose
-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*

# 高德地图混淆脚本
-keep class com.Android.support.**{ *; }
-keep interface Android.support.v4.app.**{ *; }
-keep public class * extends Android.support.v4.**
-keep public class * extends Android.app.Fragment

-dontwarn com.amap.api.**
-dontwarn com.a.a.**
-dontwarn com.autonavi.**
-keep class com.amap.api.** {*;}
-keep class com.autonavi.** {*;}
-keep class com.a.a.** {*;}

# Gson混淆脚本
-keep class com.google.gson.stream.** {*;}
-keep class com.youyou.uuelectric.renter.Network.user.** {*;}

# butterknife混淆脚本
-dontwarn butterknife.internal.**
-keep class **$$ViewInjector { *; }
-keepnames class * { @butterknife.InjectView *;}

# -------------系统类不需要混淆 --------------------------
-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 * extends Android.support.**
-keep public class com.Android.vending.licensing.ILicensingService

-keepclasseswithmembernames class * { # 保持native方法不被混淆
    native <methods>;
}
-keepclasseswithmembernames class * { # 保持自定义控件不被混淆
    public <init>(Android.content.Context, Android.util.AttributeSet);
}
-keepclasseswithmembernames class * { # 保持自定义控件不被混淆
    public <init>(Android.content.Context, Android.util.AttributeSet, int);
}
-keepclassmembers enum * { # 保持枚举enum类不被混淆
    public static **[] values();
    public static ** valueOf(java.lang.String);
}
-keep class * implements Android.os.Parcelable { # 保持Parcelable不被混淆
  public static final Android.os.Parcelable$Creator *;
}

# --------- 忽略异常提示 --------------------
-dontwarn butterknife.internal.**
-dontwarn com.alipay.**
-dontwarn com.mikepenz.**
-dontwarn org.apache.**
-dontwarn com.amap.**
-dontwarn com.Android.volley.**
-dontwarn com.rey.**
-dontwarn com.testin.**
-dontwarn jp.wasabeef.**

# ---------- 保持代码 --------------
-keep class com.youyou.uuelectric.renter.Utils.** {*;}
-keep class it.neokree.** {*;}
-keep class org.apache.** {*;}
-keep class com.iflytek.** {*;}
-keep class com.google.protobuf.** { *; }
-keep class com.youyou.uuelectric.renter.pay.** {*;}

# ---------------- eventbus避免混淆 ------------
-keepclassmembers class ** {
    public void onEvent*(**);
    void onEvent*(**);
}

# --------------- 友盟统计避免混淆 -------------------------
-dontwarn Android.support.v4.**
-dontwarn org.apache.commons.net.**
-dontwarn com.tencent.**
-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$Creator *;
}
-keepclasseswithmembers class * {
    public <init>(Android.content.Context);
}
-dontshrink
-dontoptimize
-dontwarn com.google.Android.maps.**
-dontwarn Android.webkit.WebView
-dontwarn com.umeng.**
-dontwarn com.tencent.weibo.sdk.**
-dontwarn com.facebook.**
-keep enum com.facebook.**
-keepattributes Exceptions,InnerClasses,Signature
-keepattributes *Annotation*
-keepattributes SourceFile,LineNumberTable
-keep public interface com.facebook.**
-keep public interface com.tencent.**
-keep public interface com.umeng.socialize.**
-keep public interface com.umeng.socialize.sensor.**
-keep public interface com.umeng.scrshot.**
-keep public class com.umeng.socialize.* {*;}
-keep public class javax.**
-keep public class Android.webkit.**
-keep class com.facebook.**
-keep class com.umeng.scrshot.**
-keep public class com.tencent.** {*;}
-keep class com.umeng.socialize.sensor.**
-keep class com.tencent.mm.sdk.openapi.WXMediaMessage {*;}
-keep class com.tencent.mm.sdk.openapi.** implements com.tencent.mm.sdk.openapi.WXMediaMessage$IMediaObject {*;}
-keep class im.yixin.sdk.api.YXMessage {*;}
-keep class im.yixin.sdk.api.** implements im.yixin.sdk.api.YXMessage$YXMessageData{*;}
-keep public class [your_pkg].R$*{
    public static final int *;
}

# 热修复混淆
-keep class * extends java.lang.annotation.Annotation
-keep class com.alipay.euler.andfix.** { *; }
-keepclasseswithmembernames class * {
    native <methods>;
}

除了apk源代码的混淆之外还有资源文件的混淆：

微信推出了一款apk资源混淆方案，该方案的具体原理见：安装包立减1M–微信Android资源混淆打包工具