Android打正式的release包混淆是必备的，避免APP被反编译，使项目中隐秘的技术或信息被别人查看。

Android studio则写在proguard-rules.pro中，当然写在proguard-android.txt中也可以。

buildTypes {
release {
buildConfigField "boolean", "LOG_DEBUG", "false" //不显示log
zipAlignEnabled true //Zipalign优化
shrinkResources true // 移除无用的resource文件
minifyEnabled true //混淆
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}

经常用第三方SDK的时候会忘了顺手把混淆加进来，到了打包的时候又去找，很是麻烦，因此在这里总结一下

-optimizationpasses 5 # 指定代码的压缩级别
-dontusemixedcaseclassnames # 是否使用大小写混合
-dontpreverify # 混淆时是否做预校验
-verbose # 混淆时是否记录日志
-optimizations !code/simplification/arithmetic,!field/*,!class/merging/* # 混淆时所采用的算法
-keep public class * extends android.app.Activity # 保持哪些类不被混淆
-keep public class * extends android.app.Application # 保持哪些类不被混淆
-keep public class * extends android.app.Service # 保持哪些类不被混淆
-keep public class * extends android.content.BroadcastReceiver # 保持哪些类不被混淆
-keep public class * extends android.content.ContentProvider # 保持哪些类不被混淆
-keep public class * extends android.app.backup.BackupAgentHelper # 保持哪些类不被混淆
-keep public class * extends android.preference.Preference # 保持哪些类不被混淆
-keep public class com.android.vending.licensing.ILicensingService # 保持哪些类不被混淆
-keepclasseswithmembernames class * { # 保持 native 方法不被混淆
native ;
}
-keepclasseswithmembers class * { # 保持自定义控件类不被混淆
public (android.content.Context, android.util.AttributeSet);
}
-keepclasseswithmembers class * { # 保持自定义控件类不被混淆
public (android.content.Context, android.util.AttributeSet, int);
}
-keepclassmembers class * extends android.app.Activity { # 保持自定义控件类不被混淆
public void *(android.view.View);
}
-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 *;
}

Explicitly preserve all serialization members. The Serializable interface

is only a marker interface, so it wouldn't save them.

# 显式保留所有序列化成员。可序列化接口只是一个标记接口，因此不会保存它们。
-keep public class * implements java.io.Serializable {*;}
-keepclassmembers class * implements java.io.Serializable {
static final long serialVersionUID;
private static final java.io.ObjectStreamField[] serialPersistentFields;
private void writeObject(java.io.ObjectOutputStream);
private void readObject(java.io.ObjectInputStream);
java.lang.Object writeReplace();
java.lang.Object readResolve();
}
-keepclassmembers class * {
public (org.json.JSONObject);
}
#com.demo.demo 是你的包名
-keep public class com.demo.demo.R$*{
public static final int *;
}

# removes such information by default, so configure it to keep all of it.
-keepattributes Signature

Gson specific classes

-keep class sun.misc.Unsafe { *; }
-keep class com.google.gson.stream.** { *; }

Application classes that will be serialized/deserialized over Gson

-keep class com.google.gson.examples.android.model.** { *; }
-keep class com.google.gson.** { *;}
#这句非常重要，主要是滤掉 com.demo.demo.bean包下的所有.class文件不进行混淆编译,com.demo.demo是你的包名
-keep class com.demo.demo.bean.** {*;}

2. Butterknife GitHub地址

-keep class butterknife.** { *; }
-dontwarn butterknife.internal.**
-keep class **$$ViewBinder { *; }
-keepclasseswithmembernames class * {
@butterknife.* ;
}
-keepclasseswithmembernames class * {
@butterknife.* ;
}

-dontwarn com.jeremyfeinstein.slidingmenu.lib.**
-keep class com.jeremyfeinstein.slidingmenu.lib.**{*;}

#Universal Image Loader
-keep class com.nostra13.universalimageloader.** { *; }
-keepattributes Signature

-keep class cn.sharesdk.**{*;}
-keep class com.sina.**{*;}
-keep class **.R$* {*;}
-keep class **.R{*;}
-dontwarn cn.sharesdk.**
-dontwarn **.R$*
-dontwarn com.tencent.**
-keep class com.tencent.** {*;}

#okhttp
-dontwarn okhttp3.**
-keep class okhttp3.**{*;}

#okio
-dontwarn okio.**
-keep class okio.**{*;}

# RX
-dontwarn rx.**
-keepclassmembers class rx.** { *; }

retrolambda

-dontwarn java.lang.invoke.*

-keep public class * implements com.bumptech.glide.module.GlideModule
-keep public enum com.bumptech.glide.load.resource.bitmap.ImageHeaderParser$** {
**[] $VALUES;
public *;
}

-keep class com.easemob.** {*;}
-keep class org.jivesoftware.** {*;}
-keep class org.apache.** {*;}
-dontwarn com.easemob.**
#2.0.9后的不需要加下面这个keep
#-keep class org.xbill.DNS.** {*;}
#另外，demo中发送表情的时候使用到反射，需要keep SmileUtils
-keep class com.easemob.chatuidemo.utils.SmileUtils {*;}
#注意前面的包名，如果把这个类复制到自己的项目底下，比如放在com.example.utils底下，应该这么写(实际要去掉#)
#-keep class com.example.utils.SmileUtils {*;}
#如果使用easeui库，需要这么写
-keep class com.easemob.easeui.utils.EaseSmileUtils {*;}
#2.0.9后加入语音通话功能，如需使用此功能的api，加入以下keep
-dontwarn ch.imvs.**
-dontwarn org.slf4j.**
-keep class org.ice4j.** {*;}
-keep class net.java.sip.** {*;}
-keep class org.webrtc.voiceengine.** {*;}
-keep class org.bitlet.** {*;}
-keep class org.slf4j.** {*;}
-keep class ch.imvs.** {*;}