1
打開項目中的proguard-rules.pro，將下面的代碼複製進去。我的思路是將混淆分爲2個主要部分
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定製化區域。這裏邊的內容是我們主要需要補充的部分，大致分爲4個小部分，我們接下來的步驟主要是補充這4個部分的東西。
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基本不用動區域。顧名思義，基本不用動。這塊的內容我已經寫好了，除非有特殊的需求，基本不用改動。。。請叫我雷鋒。。。。。
#-------------------------------------------定製化區域----------------------------------------------#---------------------------------1.實體類---------------------------------#-------------------------------------------------------------------------#---------------------------------2.第三方包-------------------------------#-------------------------------------------------------------------------#---------------------------------3.與js互相調用的類------------------------#-------------------------------------------------------------------------#---------------------------------4.反射相關的類和方法-----------------------#----------------------------------------------------------------------------#---------------------------------------------------------------------------------------------------#-------------------------------------------基本不用動區域--------------------------------------------#---------------------------------基本指令區-----------------------------------optimizationpasses 5-dontusemixedcaseclassnames-dontskipnonpubliclibraryclasses-dontskipnonpubliclibraryclassmembers-dontpreverify-verbose-printmapping proguardMapping.txt-optimizations !code/simplification/cast,!field/*,!class/merging/*-keepattributes *Annotation*,InnerClasses-keepattributes Signature-keepattributes SourceFile,LineNumberTable#----------------------------------------------------------------------------#---------------------------------默認保留區----------------------------------keep public class * extends android.app.Activity-keep public class * extends android.app.Appliction-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.view.View-keep public class com.android.vending.licensing.ILicensingService-keep class android.support.** {*;}-keepclasseswithmembernames class * { native <methods>;}-keepclassmembers class * extends android.app.Activity{ public void *(android.view.View);}-keepclassmembers enum * { public static **[] values(); public static ** valueOf(java.lang.String);}-keep public class * extends android.view.View{ *** get*(); void set*(***); public <init>(android.content.Context); public <init>(android.content.Context, android.util.AttributeSet); public <init>(android.content.Context, android.util.AttributeSet, int);}-keepclasseswithmembers class * { public <init>(android.content.Context, android.util.AttributeSet); public <init>(android.content.Context, android.util.AttributeSet, int);}-keep class * implements android.os.Parcelable { public static final android.os.Parcelable$Creator *;}-keepclassmembers class * implements java.io.Serializable { static final long serialVersionUID; private static final java.io.ObjectStreamField[] serialPersistentFields; private void writeObject(java.io.ObjectOutputStream); private void readObject(java.io.ObjectInputStream); java.lang.Object writeReplace(); java.lang.Object readResolve();}-keep class **.R$* { *;}-keepclassmembers class * { void *(**On*Event);}#----------------------------------------------------------------------------#---------------------------------webview-------------------------------------keepclassmembers class fqcn.of.javascript.interface.for.webview { public *;}-keepclassmembers class * extends android.webkit.webViewClient { public void *(android.webkit.WebView, java.lang.String, android.graphics.Bitmap); public boolean *(android.webkit.WebView, java.lang.String);}-keepclassmembers class * extends android.webkit.webViewClient { public void *(android.webkit.webView, jav.lang.String);}#----------------------------------------------------------------------------#---------------------------------------------------------------------------------------------------
2
理解完戰略級思想後，我們開始第一部分補充-實體類。實體類由於涉及到與服務端的交互，各種gson的交互如此等等，是要保留的。將你項目中實體類都拎出來，用以下語法進行保留。
-keep class 你的實體類所在的包.** { *; }
如我的項目下類User的完整路徑爲：com.demo.login.bean.User, 那我的混淆如下
#---------------------------------1.實體類----------------------------------keep class com.demo.login.bean.** { *; }#-------------------------------------------------------------------------
當然你的實體類肯定不止這一個，請用上邊的方式一一添加，如果你的實體類都在一個包下，那你就幸福了。
3
第2部分是第三方包。打開你的build.gradle文件，查看你用了哪些第三方的包。
dependencies { compile 'com.github.bumptech.glide:glide:3.7.0' compile 'org.greenrobot:eventbus:3.0.0'
}
我這裏用了glide，eventbus。我去他們的官網把已經寫好的混淆copy下來。
#---------------------------------2.第三方包-------------------------------#eventBus-keepattributes *Annotation*-keepclassmembers class ** { @org.greenrobot.eventbus.Subscribe <methods>;}-keep enum org.greenrobot.eventbus.ThreadMode { *; }-keepclassmembers class * extends org.greenrobot.eventbus.util.ThrowableFailureEvent { <init>(java.lang.Throwable);}#glide-keep public class * implements com.bumptech.glide.module.GlideModule-keep public enum com.bumptech.glide.load.resource.bitmap.ImageHeaderParser$** { **[] $VALUES; public *;}#-------------------------------------------------------------------------
一般官網都是有混淆的，沒有的話就google，也沒有的話自己按照上面的寫法自己寫，還不會的話。。。。。只能換個包。。。。。如果你是直接包含的jar包的話，你這樣寫
#---------------------------------2.第三方包-------------------------------#log4j-libraryjars log4j-1.2.17.jar-dontwarn org.apache.log4j.**-keep class org.apache.log4j.** { *;}#-------------------------------------------------------------------------
大致意思就是不混淆，不報warn。如果gradle報錯的話，可以考慮註釋掉-libraryjars log4j-1.2.17.jar這句。
4
第三部分與js互調的類，工程中沒有直接跳過。一般你可以這樣寫
-keep class 你的類所在的包.** { *; }
如果是內部類的話，你可以這樣
-keepclasseswithmembers class 你的類所在的包.父類$子類 { <methods>; }
例如
-keepclasseswithmembers class com.demo.login.bean.ui.MainActivity$JSInterface { <methods>; }
5
第四部分與反射有關的類，工程中沒有直接跳過。類的話直接這樣
-keep class 你的類所在的包.** { *; }
熟練後不用五分鐘就能搞定。大家可以把自己寫完混淆所用的時間寫在評論裏（0，0）
附：完整的混淆
#-------------------------------------------定製化區域----------------------------------------------#---------------------------------1.實體類----------------------------------keep class com.demo.login.bean.** { *; }-keep class com.demo.main.bean.** { *; }#-------------------------------------------------------------------------#---------------------------------2.第三方包-------------------------------#eventBus-keepattributes *Annotation*-keepclassmembers class ** { @org.greenrobot.eventbus.Subscribe <methods>;}-keep enum org.greenrobot.eventbus.ThreadMode { *; }-keepclassmembers class * extends org.greenrobot.eventbus.util.ThrowableFailureEvent { <init>(java.lang.Throwable);}#glide-keep public class * implements com.bumptech.glide.module.GlideModule-keep public enum com.bumptech.glide.load.resource.bitmap.ImageHeaderParser$** { **[] $VALUES; public *;}#log4j-libraryjars log4j-1.2.17.jar-dontwarn org.apache.log4j.**-keep class org.apache.log4j.** { *;}#-------------------------------------------------------------------------#---------------------------------3.與js互相調用的類-------------------------keepclasseswithmembers class com.demo.login.bean.ui.MainActivity$JSInterface { <methods>; }#-------------------------------------------------------------------------#---------------------------------4.反射相關的類和方法-----------------------#TODO 我的工程裏沒有。。。#----------------------------------------------------------------------------#---------------------------------------------------------------------------------------------------#-------------------------------------------基本不用動區域--------------------------------------------#---------------------------------基本指令區-----------------------------------optimizationpasses 5-dontusemixedcaseclassnames-dontskipnonpubliclibraryclasses-dontskipnonpubliclibraryclassmembers-dontpreverify-verbose-printmapping proguardMapping.txt-optimizations !code/simplification/cast,!field/*,!class/merging/*-keepattributes *Annotation*,InnerClasses-keepattributes Signature-keepattributes SourceFile,LineNumberTable#----------------------------------------------------------------------------#---------------------------------默認保留區----------------------------------keep public class * extends android.app.Activity-keep public class * extends android.app.Appliction-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.view.View-keep public class com.android.vending.licensing.ILicensingService-keep class android.support.** {*;}-keepclasseswithmembernames class * { native <methods>;}-keepclassmembers class * extends android.app.Activity{ public void *(android.view.View);}-keepclassmembers enum * { public static **[] values(); public static ** valueOf(java.lang.String);}-keep public class * extends android.view.View{ *** get*(); void set*(***); public <init>(android.content.Context); public <init>(android.content.Context, android.util.AttributeSet); public <init>(android.content.Context, android.util.AttributeSet, int);}-keepclasseswithmembers class * { public <init>(android.content.Context, android.util.AttributeSet); public <init>(android.content.Context, android.util.AttributeSet, int);}-keep class * implements android.os.Parcelable { public static final android.os.Parcelable$Creator *;}-keepclassmembers class * implements java.io.Serializable { static final long serialVersionUID; private static final java.io.ObjectStreamField[] serialPersistentFields; private void writeObject(java.io.ObjectOutputStream); private void readObject(java.io.ObjectInputStream); java.lang.Object writeReplace(); java.lang.Object readResolve();}-keep class **.R$* { *;}-keepclassmembers class * { void *(**On*Event);}#----------------------------------------------------------------------------#---------------------------------webview-------------------------------------keepclassmembers class fqcn.of.javascript.interface.for.webview { public *;}-keepclassmembers class * extends android.webkit.webViewClient { public void *(android.webkit.WebView, java.lang.String, android.graphics.Bitmap); public boolean *(android.webkit.WebView, java.lang.String);}-keepclassmembers class * extends android.webkit.webViewClient { public void *(android.webkit.webView, jav.lang.String);}#----------------------------------------------------------------------------#---------------------------------------------------------------------------------------------------
後言
將build.gradle中minifyEnabled設置爲true打個包試試吧
release {
minifyEnabled true proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' }